Xcel 7 Report post Posted January 23, 2016 My E36 325i with M50B25TU has been misfiring a bit once the engine is getting hot (around the 3rd white marker and before the hot end of the scale) so it's still within safe operating temperature. The misfire only occurs at ~2000 rpm when you're accelerating from a stop and progressively gets worse the hotter the engine gets. It never occurs when cold. Gently accelerating can avoid it but it's most noticeable under wide open throttle. Quote Share this post Link to post Share on other sites
_ethrty-Andy_ 2132 Report post Posted January 23, 2016 check your fuel system from top to toe. Quote Share this post Link to post Share on other sites
HaNs 226 Report post Posted January 24, 2016 Coil packs? Quote Share this post Link to post Share on other sites
jom 98 Report post Posted January 24, 2016 Any of the sensors can start to malfunction when it gets hot. Clear the codes, drive it hot, scan again. Quote Share this post Link to post Share on other sites
Xcel 7 Report post Posted January 24, 2016 Any of the sensors can start to malfunction when it gets hot. Clear the codes, drive it hot, scan again. Yeah I'm thinking it is probably something to do with faulty sensors (wouldn't be the first time I've encountered that). Will definitely try that next time it's getting toasty. If it was ECU related wouldn't I be seeing the CEL though? Quote Share this post Link to post Share on other sites
