TheCowboy 4 Report post Posted April 8, 2019 (edited) My e36 2.8 is stalling when given any throttle and will cut out at idle randomly. Does anyone local (wellington) have a scan tool that they could pop round and scan my car with? It is not obd2, but it is the big circle diagnostic port. Or any ideas on the issue would be great. Tried a 2nd MAF sensor but no different, infact probably worse. Edited April 8, 2019 by TheCowboy Quote Share this post Link to post Share on other sites
KwS 2425 Report post Posted April 8, 2019 Have you checked the intake piping from the MAF to TB for cracks? Sounds like an intake leak. 1 Quote Share this post Link to post Share on other sites
TheCowboy 4 Report post Posted April 8, 2019 Will check that. Cheers Quote Share this post Link to post Share on other sites
TheCowboy 4 Report post Posted April 8, 2019 Forgot to note that car runs fine if MAF sensor is unplugged. Only when plugged in is there a issue. Quote Share this post Link to post Share on other sites
KwS 2425 Report post Posted April 8, 2019 2 hours ago, TheCowboy said: Forgot to note that car runs fine if MAF sensor is unplugged. Only when plugged in is there a issue. Difference between measured air, and what's actually going into engine. No MAF, no measured air. 1 Quote Share this post Link to post Share on other sites
TheCowboy 4 Report post Posted April 9, 2019 I thought with it disconnected would run worse though due to unmeasured air? Quote Share this post Link to post Share on other sites
M3AN 4016 Report post Posted April 9, 2019 Running MAF-less uses really tolerant maps so yeah, it can run better (although it's not likely to be economical). If it runs fine with the MAF disconnected then it's likely to be a faulty MAF or a vacuum leak. If the second MAF you used was known to be good then it's likely a vacuum leak and most of these won't throw a code. Have a good look at all the rubber (non-fluid) pipes you can see on the intake side of the engine, this will require removing the intake up to the throttle butterfly (pretty simple, just clamps) so you see right under there. Some cracks aren't noticeable by eye and the next step is a smoke test for leaks which you should be able to get done for under $100. 1 Quote Share this post Link to post Share on other sites
TheCowboy 4 Report post Posted April 9, 2019 Ok will try that. Thanks for the suggestions. Quote Share this post Link to post Share on other sites
