dont know if its supposed to be like this, but my 98' 328i coupe is as gutless as hell upto 4k revs. if i'm cruisin at about 70 mph in 5th and put my foot to the floor, it hardly accelerates at all until it gets to 4k. it is the same whatever gear i'm in, including 1st, if the revs are below 4k, it takes ages to go. but when it hits 4k, it goes like stink! it drives like its got an enormous turbo with sh1t loads of turbo lag! tell you what, my old 520 used to pull 10 times better! i've also got a problem with my ASC which has been fault coded by my dealer and booked in in about a week to be fixed. i thought as the ASC was part of the throttle assembly it might have something to do with it..
do any of you guys out there know what might be causing this? it might be normal, but i wouldn't have thought so!!
To do list:
UUC System U TDM- 3/05
M50 manifold converstion 3/05
off to the tuning shop for custom software 4/05
Cams/lightened flywheel, throttlebody........ well lets see what happens
I have been in many a car and nothing really gets up and goes at 70mph. Also most of your power is going to be after 3500 rpm with alot of cars(thats why people "launch" while racing). You could have something wrong it is hard to tell, but it could also be your perception fo the car. It is not going to be a real fast car. I am not even sure my dads M3 had a whole lot of power at 70 mph, but it has been a while since i drove that.
Originally posted by jshearer@Apr 6 2005, 07:03 PM I have been in many a car and nothing really gets up and goes at 70mph. Also most of your power is going to be after 3500 rpm with alot of cars(thats why people "launch" while racing). You could have something wrong it is hard to tell, but it could also be your perception fo the car. It is not going to be a real fast car. I am not even sure my dads M3 had a whole lot of power at 70 mph, but it has been a while since i drove that.
If it is really as slow as you're saying it sounds like your vanos is stuck in advanced timing for higher RPM's? How many miles are on it and got any odd noise coming from the engine?
BTW my car is the same way, it doesn't relaly make power unless I'm at 4k+ rpm's. It made it even worse after I put the M50 intake manifold in but there's even more power above 4k now... and if you want to go fast you're never under 4k rpm so downshift
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thanks for replying guys, but it makes no odds what gear i'm in.. say i've just pulled away nice and slow (like when its cold) slip it into 2nd gear and put my foot down to the floor, it has no power at all untill 4k, then it flies along! most of the time you wouldn't even know i was accelerating until 4k revs. in all the other cars i've ever been in, no matter what gear your in, it will pull more than mine. the car has only done 70000 miles. tell me more about the vanos sensor, and i've heard of dodgy lambda sensors too, being a problem, but dont know what they are! i'm sure there is something a miss.. there is no odd noises coming from the engine either, but sometimes when i'm waiting at lights or whatever, the revs fluctuate up and down, say from 400 - 1000 up and down until i rev it up a bit..
ive sort of noticed this problem in my car lately too. yesterday i actually had a lot of trouble accelerating, but only for like 30 seconds it was very strange. i thought it couldve been a compression problem, but now im leaning toward it might be the spark plugs ready to be changed
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a cars horsepower is not what the dyno says until you hit the top mark. So until you get there, you only have a fraction of the power. And when your on the highway, going 70 and you punch it, your not going to accelerate so fast because the force of the wind pushing againts you is so great!
i do down shift, but even then, it takes a while for the power to come. i drove my 520 the same way as i drive this, but if the two cars were side by side doing 2k revs in the same gear and both just put the pedal to the metal as it were, my old shagged out 520 would pull away with no problems and leave my 328 for dust.. until that it the imaginary turbo kicks in at 4k, then it would be another story! it just doesn't feel like it is right that i need to thrash the nuts of it to keep it in its power band. what is the vanos? could there be a problem with that?
I 've also had the same symptoms with my 328i along with the check engine light on. The diagnostic code was P0341 (CamShaft Position Sensor).
Is your check engine light on? Even if your check engine light is not on, take the car to AutoZone (if you don't have code scanner/reader) and have them read if there are any codes stored in the computer. You could have a pending code.
Unless your used to driving something with over 300 horses, i would say theres something wrong with your car. The 6 cylinder bimmers arent really considered 'gutless', although they arent all THAT fast either.
Originally posted by catalyst.@Apr 7 2005, 04:52 PM Unless your used to driving something with over 300 horses, i would say theres something wrong with your car. The 6 cylinder bimmers arent really considered 'gutless', although they arent all THAT fast either.
i did used to have a chipped audi s4 with about 310 bhp, but before that i had a bmw e34 520 and even that would blow my 328 away in the lower rev band! i wasn't expecting anything like my s4, but above 4k revs, there's not that much difference really, its just below 4k and its shat! my engine light isn't on, but my asc light keeps coming on and staying on.. dont know if thats to blame, but i'll get it plugged in and see what it brings up. at least now, i've got a bit of knowledge that i can put to the mechanic! thanks very much for all your replys!
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