Knowledge (XXG)

Motronic

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computers in one package. One side of the ECU controlled the timing and fueling while the other side controlled the boost and knock control. Each side has its own Siemens SAB80C535 processor and its own EPROM for storing operating data. What made this ECU special was the use of two crank sensors and one cam sensor. The ECU used one crank sensor to count the teeth on the starter ring for its RPM signal, and the other read a pin on the back of the flywheel for TDC reference. This ECU was first seen when the 20V turbo 5-cylinder engine (RR Code) was installed into the Audi Quattro. It was then used in the Audi 200 20V turbo until 1991 when the Audi S4 was introduced and the ECU received several upgrades, including migration from a distributor-based ignition to coil on plug sequential ignition and an added overboost function. This ECU ended in 1997 when the last Audi S6 rolled off the assembly line. This ECU was also used in the legendary Audi RS2 Avant.
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mounted to the camshaft to detect which cylinders are approaching the top of their stroke, therefore which injector bank should be fired. During start-up (below 600 rpm), or if there is no signal from the cylinder ID sensor, all injectors are fired simultaneously once per engine revolution. In BMW vehicles, this Motronic version did not have a cylinder ID and as a result, both banks of injectors fired at once.
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injectors based on engine temperature. The idle speed is also fully controlled by the digital Motronic unit, including fast-idle during warm-up. Updated variants ML 2.10.1 through 2.5 add MAF Mass Air Flow sensor logic and direct fire ignition coils per cylinder. Motronic 2.1 is used in the Porsche 4 cyl 16V 944S/S2/968 and the 6 cyl Boxer Carrera 964 & 993, Opel/Vauxhall, FIAT & Alfa Romeo engines.
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Motronic 5.2.1 was used in Land Rover Discovery Series II and P38 Range Rovers that were built starting with late 1999. It was only used in cars equipped with V8 gasoline engines. This variant of the engine management system was adapted for off-road use. Unlike the Motronic system in BMW sedans, that
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The M4.4 was based on its predecessor and featured only a small number of improvements. Memory capacity was doubled and a few new functions were introduced such as immobilizer compatibility. OBD II was standard on all cars fitted with this system albeit the necessary protocols were not integrated for
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Fuel enrichment during cold-start is achieved by altering the timing of the main injectors based on engine temperature, no "cold start" injector is required. The idle speed is also fully controlled by the Motronic unit, including fast-idle during warm-up (therefore no thermo-time switch is required).
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The ML 2.1 system integrates an advanced engine management with 2 knock sensors, provision for adaptive fuel & timing adjustment, purge canister control, precision sequential fuel control and diagnostics (pre OBD-1). Fuel enrichment during cold-start is achieved by altering the timing of the main
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The Motronic 1.1 and 1.3 systems are largely similar, the main improvement being the increased diagnostic capabilities of Motronic 1.3. The 1.3 ECM can store many more detailed fault codes than 1.1, and has a permanent 12-volt feed from the vehicle's battery which allows it to log intermittent faults
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While the ML-Motronic is continuing and new ML-Motronic versions appear, Bosch launched the M-Motronic. There were many versions. While older versions were improved and further developed, new M-Motronic versions appear. So it makes no sense, to identify newer/older versions within the first counting
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Successor of the Motronic 2.5. Was used from 1992 at Opel C20XE engine. Major change was the introduction of DIS ignition. Was also at Opel V6 engine C25XE (1993, Opel Calibra (also X25XE), Opel Vectra A) used. Modified as M2.8.1 (1994) for X30XE and X25XE (Opel Omega B). M2.8.3 engine X25XE (Opel
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This system was used on some of General Motors engines (C20NE, 20NE, C20SE, 20SE, 20SEH, 20SER, C20NEF, C20NEJ, C24NE, C26NE, C30LE, C30NE, C30SE, C30SEJ, C30XEI...). The system is very reliable and problems encountered are usually caused by poor contact at the associated plug/socket combinations
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The systems have the option for a lambda sensor, enabling their use with catalytic converter-equipped vehicles. This feedback system allows the system to analyse exhaust emissions so that fuel and spark can be continually optimised to minimise emissions. Also present is adaptive circuitry, which
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The M2.3.2 system was made for Audi's turbo 20V 5-cylinder engines mainly, but a variant was also used on the Audi 32V 3.6L V8 and a few Audi 32V 4.2 V8 engines. The turbo 5 cylinder version was the first time knock and boost control had been introduced in one ECU, though the ECU was really two
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The Motronic units have 2 injection outputs, and the injectors are arranged in 2 "banks" which fire once every two engine revolutions. In an example 4-cylinder engine, one output controls the injectors for cylinders 1 and 3, and the other controls 2 and 4. The system uses a "cylinder ID" sensor
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ML-Motronic appears in 1979. BMW equipped the E32 732i with the Bosch ML-Motronic. This was a L-Jetronic (now in digital technology) with digital ignition control in the same housing. Data was stored in EPROM. ML-Motronic and M-Motronic must be keep apart. There is ML3.2 and M3.2, these a two
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The V8 version of the ECU was only single processor based while retaining all the same features of the turbo 5-cylinder ECU less the boost control. The 3.6 V8 version had a distributor-based ignition system and was upgraded around the same time to coil on plug as its 20V turbo counterpart in
479:) in October 1993 for model year 1994. Features included OBD I diagnostics, dual knock sensors and a lot more. For the 1996 model year OBD II diagnostics were introduced on some cars while M4.3 was beginning to be phased out. The last M4.3 equipped cars were made for model year 1997. 40:(commonly known as Bosch) which combined control of fuel injection and ignition in a single unit. By controlling both major systems in a single unit, many aspects of the engine's characteristics (such as power, fuel economy, drivability, and emissions) can be improved. 549:
uses a chassis accelerometer to differentiate between misfires and rough road, the Land Rover version used signal from ABS control unit to detect rough road conditions. This version of the system was integrated with body control module and anti-theft system.
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by connecting a calibrated resistor (taking the form of an "octane coding plug" in the vehicle's wiring loom) to one of the ECU pins, the resistance depending on the octane adjustment required. With no resistor attached the system would default to 98 octane.
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The key feature of Motronic 1.7 is the elimination of an ignition distributor, where instead each cylinder has its own electronically triggered ignition coil. Motronic 1.7 family has versions 1.7, 1.7.2, 1.7.3, all of them used on M42/M43 engines in
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The components of the Motronic ML1.x systems for the most part remained unchanged during production, although there are some differences in certain situations. The engine control module (ECM) receives information regarding engine speed,
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Was used since 1994 in the Opel Omega B with X20SE engine. (Modified successor of C20NE engine) Major change to the Motronic 1.5.2 was the use of DIS ignition system, knock sensor and EGR valve. Was also used in the Opel engine X22XE.
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all markets. The system was used for the five- and six-cylinder modular engined cars and was used on turbocharged and naturally aspirated models. Introduced in 1996 for 1997 model year it was first installed on some of the last
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Motronic 1.2 is the same as 1.1, but uses a hot-film MAF in place of the flapper-door style AFM. This version was used by BMW on the S38B36 engine in the E34 M5 and on the M70B50 engine in the 750il from 1988 until 1990.
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adjusts for changes in an engine's characteristics over time. Some PSA engines also include a knock sensor for ignition timing adjustment, perhaps this was achieved using an external Knock Control Regulator.
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There is a single output for the injectors, resulting in all injectors firing simultaneously. The injectors are opened once for every revolution of the engine, injecting half the required fuel each time.
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The ML4.1 system did not include provision for a knock sensor for timing adjustment. The ignition timing and fuel map could be altered to take account of fuels with different
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Motronic 1.1 was superseded in 1988 by the Motronic 1.3 system that was also used by PSA on some XU9J-series engines (which previously used Motronic 4.1). and by BMW.
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that link the various system sensors to the Electronic Control Unit (ECU). Predecessor of the ME Motronic. Also used in the Opel engines C16SEI
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Compared with ML1.3, this system adds knock sensor control, purge canister control and start-up diagnostics. Motronic 3.1 is used in non-
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angle, coolant temperature and throttle position. An air flow meter also measures the volume of air entering the induction system.
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derivatives made by Siemens, usually SAB80C515 or SAB80C535. Code/data is stored in DIL or PLCC EPROM and ranges from 32k to 128k.
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Was used since 1991 in the Opel Astra F with C20NE engine. Major change was the use of a MAF instead of AFM in the Motronic 1.5.
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engine. Compared to 1.7, Motronic 5.2 has OBD-II capability and uses a hot-wire MAF sensor in place of the flapper-door AFM.
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The M2.3 und M2.3.2 (used by Audi/VW) appears long before 1997. So the M1.5.5 is much more developed than the M2.3.2.
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5th injector is used to provide extra fuel enrichment during different cold-start conditions. (in some configurations)
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Often known as "Motronic basic", Motronic ML1.x was one of the first digital engine-management systems developed by
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Was introduced in 1988 in the Opel Kadett E GSi 16V C20XE engine. Sequential fuel injection and knock control.
1136:"BMW E30/E36 DME Motronic ECU Swap | 3-Series (1983-1999) | Pelican Parts DIY Maitenance Article" 151:. This version was also used by Volvo from 1982-1989 on the turbocharged B23ET, B230ET and B200ET engines. 1914: 1610: 1590: 1556: 426: 1848: 1822: 1655: 660:
ML-Motronic and M-Motronic must be keep apart. There is ML3.2 and M3.2, these are two different things.
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in memory across several trips. Motronic 1.1 can only advise of a few currently-occurring faults.
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Crank position and engine speed is determined by a pair of sensors reading from the flywheel.
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Motronic ML4.1 was used in the Opel engines: 20NE, 20SE, 20SEH, 20SER, C20NE, C30LE, C30NE.
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models like the 2.5 20V and AWD. A coil on plug variant existed for the six cylinder
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Separate constant idle speed system monitors and regulates base idle speed settings.
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Late '80s and early '90s, various Ferrari. Some Opel / Vauxhall (C20LET engine).
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up to 1995. The BMW M70 12 cylinder had the Motronic M1.7 and two distributors.
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fuel injection technology. It was originally developed and first used in the
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MED-Motronic - direct fuel injection is integrated in the Motronic System
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Motronic 3.3 is used by BMW M60B30/B40 V8's in the 5, 7 & 8 series.
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Motronic M4.x is powered by various i8051 derivatives made by Siemens.
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microcontroller with code in flash memory ranging from 128kB to 256kB.
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The Motronic 4.6 was used in Nissan Micra K11 from 2000 until 2003.
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ME-Motronic - drive by wire is integrated in the Motronic System
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MA-Motronic - load is calculated by angle of the throttle body
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Motronic M3.8x is used in many Volkswagen/Audi/Skoda vehicles
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derivatives made by Siemens, usually SAB80C515 or SAB80C535.
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Motronic 1.1 was used by BMW from 1987 on motors such as the
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eight-valve engines from 1987 to 1990, Alfa Romeo and some
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the system was used until the end of model year 1998.
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may be fitted (the system was originally designed for
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MP-Motronic - load is calculated by manifold pressure
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http://www.oocities.org/thevolvoaddict/article_4.htm
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Archived from 467:It was introduced with the launch of the 130:Depending on application and version, an 1348:"Motronic 4.4 - Summary of New Features" 1189:"BimCOM - supported BMW 5 control units" 1175:"BimCOM - supported BMW 3 control units" 662: 560: 118:incorporated into the same control unit. 992: 1130: 1128: 1126: 1124: 417:The Motronic ML4.1 system was used on 72:, before being implemented on several 1001:"The Bosch Group - Published in 2004" 640:numbers after the “M”. For example: 460:for their five-cylinder turbocharged 7: 1877: 251:Motronic M2.x is powered by various 114:Fuel delivery, ignition timing, and 48:Motronic M1.x is powered by various 1407:. Volvo Cars of North America. 1997 1327:. Volvo Cars of North America. 1996 1295:"850 T-5 Turbo – Press information" 302:Vectra B) and X30XE (Opel Sintra). 1300:. Volvo Car UK Ltd. pp. 6, 11 14: 1751:Digifant engine management system 977:Digifant Engine Management system 1925:Automotive technology tradenames 1876: 1865: 1864: 1681: 1464:(Brochure). 1997. pp. 12–13 1264:Lester Bravek (September 1998). 644:M1.5, introduced by Opel in 1988 1716:Japan Electronic Control System 373:Motronic 3.7.1 is used in the 80:engines throughout the 1980s. 1: 536:Motronic 5.2 was used in the 487:The Motronic 4.4 was used by 464:models from 1993 until 1996. 456:The Motronic 4.3 was used by 16:Series of engine control unit 1704:Broadcast Television Systems 1492:Motronic 1.1/1.3 information 357:Motronic 3.7 is used in the 310:Motronic M3.x is powered by 107:Main system characteristics 1946: 381:3.8.1, 3.8.2, 3.8.3, 3.8.4 377:in the 24 valve variants. 345:Motronic 3.3.1 is used in 1857: 1679: 553:short list of ML-Motronic 1027:"Bosch Motronic Secrets" 635:Short list of M-Motronic 239:This system was used by 1346:Volvo Car Corporation. 1070:"Motronic Chip Ugrades" 1905:Fuel injection systems 1695:of these are no longer 1591:Bosch Security Systems 491:from 1996 until 1998. 26: 1849:Robert Bosch Stiftung 1823:Robert-Bosch-Hospital 1273:www.mastertechmag.com 952:MP MA ME MED Motronic 429:XU9J-series engines. 24: 1668:Telex Communications 1405:"MY1998 VIN decoder" 1355:www.volvoclub.org.uk 1325:"MY1997 VIN decoder" 1266:"Motronic 4.3 - 4.4" 1140:www.pelicanparts.com 1076:on 15 September 2008 375:Alfa Romeo V6 engine 359:Alfa Romeo V6 engine 349:engines with VANOS. 34:engine control units 1220:on 8 December 2015. 427:PSA Peugeot CitroĂ«n 93:naturally aspirated 1693:shareholdings (any 1691:Joint ventures and 1625:Former and defunct 1596:Bosch Solar Energy 558:different things. 229:BMW 5 Series (E34) 225:BMW 3 Series (E36) 27: 1920:Engine technology 1892: 1891: 1677: 1676: 1377:"850 US brochure" 949: 948: 632: 631: 471:(also called the 91:If the engine is 38:Robert Bosch GmbH 1937: 1910:Embedded systems 1880: 1879: 1868: 1867: 1861: 1792:Franz Fehrenbach 1787:Robert Bosch Jr. 1731: 1685: 1684: 1580: 1573: 1566: 1559: 1541: 1521: 1514: 1507: 1498: 1488:official website 1474: 1473: 1471: 1469: 1463: 1455: 1449: 1448: 1446: 1444: 1438: 1431: 1423: 1417: 1416: 1414: 1412: 1401: 1392: 1391: 1389: 1387: 1382:(Sales brochure) 1381: 1373: 1367: 1366: 1364: 1362: 1352: 1343: 1337: 1336: 1334: 1332: 1321: 1310: 1309: 1307: 1305: 1299: 1290: 1284: 1283: 1281: 1279: 1270: 1261: 1255: 1254: 1252: 1250: 1241: 1233: 1222: 1221: 1216:. 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112: 109: 106: 105: 104: 102: 98: 94: 89: 87: 81: 79: 75: 71: 67: 63: 55: 53: 51: 43: 41: 39: 36:developed by 35: 31: 23: 19: 1882: 1869: 1782:Robert Bosch 1760: 1730:, disbanded) 1537:subsidiaries 1466:. Retrieved 1453: 1441:. Retrieved 1434:the original 1421: 1409:. Retrieved 1384:. Retrieved 1371: 1359:. Retrieved 1354: 1341: 1329:. Retrieved 1302:. Retrieved 1288: 1276:. Retrieved 1272: 1259: 1247:. Retrieved 1243: 1218:the original 1208: 1197: 1183: 1169: 1155: 1143:. Retrieved 1139: 1111:. Retrieved 1107: 1080:15 September 1078:. Retrieved 1074:the original 1047: 1035:. Retrieved 1031:the original 1021: 1009:. Retrieved 1005:the original 995: 659: 656: 653:M1.5.5, 1997 650:M1.5.4, 1994 647:M1.5.2, 1991 638: 556: 547: 535: 527:Motronic 5.X 522: 493: 486: 476: 472: 468: 466: 455: 447: 443: 435: 431: 416: 408: 400: 392: 389:Motronic 4.X 384: 372: 356: 344: 336: 321: 309: 306:Motronic 3.x 300: 292: 284: 275: 271: 262: 250: 247:Motronic 2.x 238: 221: 213: 204: 196: 187: 178: 175: 166: 157: 153: 146: 97:turbocharged 90: 82: 70:BMW 7 Series 59: 47: 44:Motronic 1.x 29: 28: 18: 1813:Bosch-Halle 1728:Samsung SDI 1722:SB LiMotive 1459:"Volvo S70" 1427:"Volvo V70" 1054:frwilk.com 277:1992–1993. 136:leaded fuel 116:dwell angle 101:intercooler 1899:Categories 1777:Anna Bosch 1746:Bosch 1886 1726:(50% with 1361:21 October 1278:21 October 988:References 538:BMW M44B19 363:L-Jetronic 347:BMW M50B25 327:BMW M50B25 86:crankshaft 1818:Gerlingen 1632:Blaupunkt 1611:Worcester 1486:Bosch.com 940:M 7.9.81 923:M 7.9.41 759:M 2.10.4 674:M 1.11.1 628:ML 6.1.4 513:Volvo C70 509:Volvo S70 505:Volvo V70 501:Volvo 960 469:850 Turbo 329:engines. 268:2.3/2.3.2 1871:Category 1761:Motronic 1756:Jetronic 1739:Products 1644:Indramat 1557:Gaggenau 1468:21 April 1443:21 April 1411:21 April 1386:21 April 1331:21 April 1304:21 April 982:Jetronic 971:See also 934:M 7.9.71 931:M 7.9.52 904:M 7.4.4 899:M 5.9.2 891:M 5.4.1 883:M 5.2.2 875:M 4.6.2 864:M 4.4.2 841:M 3.4.4 819:M 3.2.1 811:M 2.9.1 803:M 2.8.3 782:M 2.4.1 774:M 2.3.2 756:M 2.10.3 753:M 2.10.2 750:M 2.10.1 740:M 1.9.5 718:M 1.7.3 707:M 1.5.5 698:M 1.5.1R 687:M 1.3.1 423:Vauxhall 66:Jetronic 30:Motronic 1883:Commons 1710:Fernseh 1638:Fernseh 1544:Current 1249:19 July 1145:19 July 1113:19 July 1052:944 DME 1037:6 March 937:M 7.9.8 928:M 7.9.5 920:M 7.9.4 917:M 7.9.2 914:M 7.9.1 880:M 5.2.1 872:M 4.6.1 861:M 4.4.1 838:M 3.4.3 835:M 3.4.2 832:M 3.4.1 800:M 2.8.1 737:M 1.9.4 734:M 1.9.2 731:M 1.9.1 715:M 1.7.2 704:M 1.5.4 701:M 1.5.2 695:M 1.5.1 605:ML 5.3 582:ML 2.2 473:850 T-5 78:Porsche 1806:Places 1770:People 1724:  1601:Dremel 1578:Pitsos 1011:4 June 945:M 9.2 909:M 7.5 856:M 4.3 851:M 4.2 846:M 4.1 824:M 3.3 792:M 2.7 787:M 2.5 745:M 2.1 723:M 1.8 679:M 1.2 671:M 1.11 666:M 1.1 625:ML 6.1 622:ML 5.9 619:ML 5.7 616:ML 5.6 613:ML 5.5 610:ML 5.4 602:ML 5.2 599:ML 5.1 596:ML 4.1 593:ML 3.3 590:ML 3.2 587:ML 3.1 579:ML 2.1 573:ML 1.3 570:ML 1.2 567:ML 1.1 210:M1.5.5 1832:Other 1616:Zexel 1571:Balay 1528:Bosch 1462:(PDF) 1437:(PDF) 1430:(PDF) 1380:(PDF) 1351:(PDF) 1298:(PDF) 1269:(PDF) 1240:(PDF) 1104:(PDF) 896:M 5.9 888:M 5.4 869:M 4.6 829:M 3.4 816:M 3.2 808:M 2.9 797:M 2.8 779:M 2.4 771:M 2.3 764:M 2.2 728:M 1.9 712:M 1.7 692:M 1.5 684:M 1.3 544:5.2.1 489:Volvo 458:Volvo 369:3.7.1 341:3.3.1 324:VANOS 253:i8051 241:Volvo 201:1.5.4 193:1.5.2 74:Volvo 62:Bosch 50:i8051 1662:Skil 1606:ETAS 1564:NEFF 1470:2018 1445:2018 1413:2018 1388:2018 1363:2017 1333:2018 1306:2018 1280:2017 1251:2023 1244:OPEL 1147:2023 1115:2023 1108:OPEL 1082:2008 1039:2008 1013:2006 576:ML 2 564:ML 1 511:and 475:and 419:Opel 405:40.1 397:40.0 312:i196 76:and 532:5.2 519:4.6 497:850 483:4.4 462:850 452:4.3 413:4.1 409:?? 401:?? 353:3.7 333:3.3 318:3.1 297:2.8 289:2.7 281:2.5 259:2.1 235:1.8 218:1.7 184:1.5 172:1.3 163:1.2 149:M20 143:1.1 56:1.0 1901:: 1396:^ 1353:. 1314:^ 1271:. 1242:. 1226:^ 1138:. 1123:^ 1106:. 1090:^ 1059:^ 507:, 421:/ 365:. 138:). 1718:² 1712:² 1706:² 1670:Âą 1664:² 1658:Âą 1652:² 1646:Âą 1640:² 1634:² 1520:e 1513:t 1506:v 1472:. 1447:. 1415:. 1390:. 1365:. 1335:. 1308:. 1282:. 1253:. 1191:. 1177:. 1163:. 1149:. 1117:. 1084:. 1041:. 1015:.

Index


engine control units
Robert Bosch GmbH
i8051
Bosch
Jetronic
BMW 7 Series
Volvo
Porsche
crankshaft
naturally aspirated
turbocharged
intercooler
dwell angle
oxygen sensor
leaded fuel
M20
BMW 3 Series (E36)
BMW 5 Series (E34)
Volvo
i8051
i196
VANOS
BMW M50B25
BMW M50B25
Alfa Romeo V6 engine
L-Jetronic
Alfa Romeo V6 engine
Opel
Vauxhall

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