03-06-2024, 12:20 PM | #1 |
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2015 335 , Is my engine toast ?
I drove the car for about 1 hour straight car was running fine , i then stopped and to get food . when i went back to start the car it only cranked(almost turning on) but did not start. got the car towed home & had 2 mechanics come look at it . the first mechanic tested fuel pumps and they both seem to be working . Checked all fuses too . He did a spark test to the coils and they were not getting spark he said it might be the crankshaft sensor . BOTH MECHANICS SAID NO CODES SHOW UP , i also checked codes with bm3 and only code i get is
- 21a023 combustion engine : false start or engine stopped without driver influence 2nd mechanic said there was spark and did compression test and all cylinders came back to 60PSI and that i need a new engine i'm confused from both answers and my questions are would no spark cause engine to have low compression ? The car was driving fine before it wouldn't start . where else should i look or what other tests should i run before getting into buying a new motor . |
03-06-2024, 12:36 PM | #3 |
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Sorry i don’t have a direct answer. Mainly just questions.
-What is ur current mileage? -What Maintenance have you done? -When was the last time you changed Spark Plugs / Coils? -Did you take it to a dealer or an indie shop? Anymore info would help narrow down things. Hopefully someone will be able to give you an answer. |
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03-06-2024, 01:29 PM | #4 |
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yeah the i drove the car an hour and a half with no issues and soon as i turned it off to walk in the store for 10 mins came back out and it just cranked . thats true tho 2nd mechanic told me the same
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03-06-2024, 01:38 PM | #5 | |
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car is also on bm3 stage 2 tune fbo running 93 had some issues of the engine stalling out like 3 times in the past 3 years while cruising on the highway bout 80mph sometimes coming back on as im still on the gas pedal ( seemed like fuel pump but they both seem fine ) car always started back up , i can post bm3 logs of fuel pumps psi i have while cranking the car if that helps in any way . car takes a while to turn on sometimes in cold weather and has small valve cover leak https://youtube.com/shorts/VxVy4_sO0UQ?feature=share video of how it sounds when cranking Last edited by Skrrtt335; 03-06-2024 at 01:48 PM.. |
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03-07-2024, 07:58 PM | #6 |
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Bro weirdest shit ever, my F30 just did this same exact thing almost yesterday. I pulled in to get food and as I was driving away it turned off. I pulled codes and had 21A023, and I cleared it with MHD. Car started up and drove home about 4 miles w/o issue after that..... Strange...
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03-14-2024, 11:38 AM | #7 |
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For what it’s worth i don’t think your engine is toast. It sounds potentially electrical? Cam Sensor losing signal or something.
IMO it might be worth taking it over to a BMW dealer and seeing what they say. $250~ in Diagnostics is way better peace of mind than a autozone mechanic and a indie mechanic. Sorry i’m not more help. I personally take my car to a indie shop for all my work. Good luck man! |
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03-14-2024, 07:06 PM | #8 |
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thanks for all the advice guys , i have it at a bmw specialist rn he thinks its valvetronic issue . He said hes taking the valvecover off tmr . i did get valvetronic motor code when i checked for codes when car didnt start but i cleared it and never came back . He also said car was showing low compression on all cylinders . could that be bc of valvetronic stuck or not working ? car has spark / fuel .
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03-14-2024, 08:37 PM | #9 | |
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03-15-2024, 09:29 PM | #10 |
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yeah the mechanic just got back to me & said my eccentric shaft had all my valves closed & the valvetronic motor blew . Going to replace the valve cover aswell cause i had a leak
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03-15-2024, 10:16 PM | #11 |
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Well at least its not an entire engine. Glad to see that you at least came out on top. Good luck! Hopefully it wont be too much by the end.
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