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BMW 3-Series (E90 E92) Forum
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Errors: A0B4, 2ACC, 2ACB - Cranks, but doesn't start
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09-01-2024, 02:46 PM | #45 |
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Another update
Had DME repaired by The ECU Pro team - files were corrupt!
I now have tach reading and spark during crank - BUT still crank no start. So, last two issues to resolve are: injector wiring (continuity) since i have good fuel pressure at the rail - failing that, i will need to pull the valve cover to deal with a timing belt issue no doubt! |
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09-01-2024, 02:53 PM | #46 |
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Another update
Reconfirmed i had a good injector relay - clicked fine to the touch and tested well under load.
Pulled injector wiring diag from ISTA and was going to test all wires for continuity - in looking at the nightmare to get access to all the various points it occurred to me just to pull the injector rail and crank engine - yup, all injectors firing fine. |
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09-01-2024, 02:59 PM | #47 |
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09-01-2024, 03:04 PM | #48 |
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Hi no I gave over diagnosing I am going to swap the engine wiring with cas dme egs amd key also possibly cabin wiring because it’s a failure to communicate so maybe sort going to egs or cas but I will be starting to change wiring I got another doner car
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09-01-2024, 03:51 PM | #49 | |
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Noticed my cranking sounds different - with a sort of air blowout pop - will search YT to see if i get lucky with someone understanding what it could be! Best |
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09-20-2024, 01:17 AM | #50 | |
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Was about to buy an oscilloscope to check crank cam correlations for timing as I was getting no codes whatsoever when a YT video gave me the idea to check compression - had previously - couple years ago - been prefect, and they were all over the place, mostly low. Soaked them over 48hours with valve cleaner, approx 30 ml - then blew it out with compressor. Compression came back on all to be a very heathy 175 psi - with a couple up at 200! Started first time - smoked like a diesel locomotive for 5 mins burning off all the cleaner and then settled down to a purring within 10 mins. Trust this is of some help- best of luck. |
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10-19-2024, 08:24 PM | #51 | |
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Happy days you got it working But what did you do to get the communication back also I think you had codes that were coming up as preventing manipulation or something if I remeber correctly |
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