Hello everyone I have a 98 m52 e36. I've owned it since this February and ever since the first day I got it it just doesn't feel the same I remember when I took it for test drive I would floor it and it would respond asap and feel like from factory and when I would rev it up it would come back to normal idle quickly. Now that im dailying it in fourth gear I floor it and car doesn't rev past 3k rpms. Idk if it's my bad cats or maybe that stupid muffler delete. I really don't have any fuel or air related air leaks. So was wondering what kind of issues you guys could think of
I sometimes rev the car in neutral and when the rpm needle comes down it doesn't maintain a proper idle. Like it will come back down to 800 revs then in a couple seconds eventually fall back down to my normal 600 revs it just doesn't feel smooth when flooring it or maintain proper idle. I get bad mpg too and isn't smooth as from February. I've cleaned icv,replaced maf,vcg all types of things and I do have a sucking sound when removing the oil filler cap wonder what that's for I just put in a new ccv and hoses. Replaced all vaccum lines too any ideas. No shop is helping me out because they say car is too old.
Try pulling the codes. Did the car come with the straight pipe/muffler delete or is this something you did after purchasing it? If the latter, that's probably what is causing your less than ideal gas mileage. How are your injectors looking?
Your Trusted Source For DIY and Parts
FREE SHIPPING over $99 click here
BMW Parts | DIY Tech Articles | Facebook | Twitter | Instagram | YouTube | Promos
888.280.7799 | 6am - 5pm PST
yeah it starts to freak out and run rough, also has a suction noise.
- - - Updated - - -
no i did the muffler delete. only codes are a evap code of P0446 which is prob why my gas tank hard to fill past 7 gallons but yeah no other helpful codes. i took fuel injectors out they dont seem to have any broken o rings and i did a ressistance test on them they were all very equal to each other.
Is the fuel pump original? When was the fuel filter last changed? The engine refusing to rev passed 3000rpm could be a fuel delivery problem.
or clogged cats
-Abel
- E36 328is ~210-220whp: Lots of Mods.
- 2000 Z3: Many Mods.
- 2003 VW Jetta TDI Manual 47-50mpg
- 1999 S52 Estoril M Coupe
- 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
- 2019 M2 Competition, self-tuned, 504whp
- 2016 Mini Cooper S
Unfortunately the you engine doesn’t have a fuel pressure test valve on the fuel rail like the M54 engine does. Did you scan the computer for codes?
Chris Powell
Racer and Instructor since, well. decades, ok?
Master Auto Tech, owner of German Motors of Aberdeen
BMWCCA 274412
German Motors is hiring ! https://www.bimmerforums.com/forum/s...1#post30831471
Bookmarks