My '98 did this when i had it in 2003 and I could never figure it out...and i hated it...seemed to do it around the change of seasons though...fall-into winter and then spring-into summer.
I scanned my codes this past weekend and nothing showed up. I also took the car out on a high way run tonight and sure enough at about 6200-6500 rpms in 3rd gear the sputter is still there.
Next will be swapping coils with my brother's 330ci to see if that cures the issue.
Doug
'97 M3/4
Go and pull the vehicle speed sensor in the diff (2 10mm bolts, accessible under the car without a jack.... just crawl) and see if it has any metal stuck to it.
1/4 mile in 13.1 @ 106++ (calculators put this at 0-60 in "4.21" seconds.)
I had a feeling it would. I really really think it's ignition related. Did you replace the coils yet?
Doug
'97 M3/4
Coils were new as of over a year ago -- just ordered a cam position sensor from cmuzzy. Our cam position sensor is weird - from what I hear, it's kind of a combination VR/Hall sensor - it does not give a full on sine wave like a VR, but is not simply "on/off" like the hall. Hence why we can't buy a generic $15 hall to replace it!!
Did swapping the coils help?
I'm thinking about sending my injectors in to get cleaned and to replace the little parts
99 Alpine/Gutted ///M3
98 Estoril/M-Technic cloth ///M3
- RIP http://forums.bimmerforums.com/forum....php?t=1191513
I still didn't get a chance to swap them. I've been up to my ears with other projects. I will definitely report back hopefully soon.
Doug
'97 M3/4
not sure if this help.. but my 95 used to do the same thing at about 5500-6500 in 3rd. I tried the basics: fuel filter/ plugs.. but nothing helped
then the car threw the o2 code. After i replaced the o2 sensor(95s only have one).. it hasn't happened again. (knock on wood)
just an idea.
Mods: Eibach Sways, xbrace, JC chip, jtd underpanel, ssk
Bump,
I now have the same problem, did any of you guys figure out what's causing that?
I haven't had it happen in a long time.
I have been getting an O2 code every now and again. I have all 4 sensors ready to replace, but I just haven't had the time.
Doug
'97 M3/4
I haven't changed anything and the issue hasn't occured recently. I can't remember the last time it happened actually. Granted I don't run my car up to those speeds every time I drive, but again I haven't had issues. Of course now that I write this, the problem will return tomorrow morning.
Doug
'97 M3/4
Well, good news, it looks like in my case at least it was bad gas, after having those sputters for couple weeks, I finally had to get some gas, went to a different gas station and haven't had the problem for couple of days now, hopes it stays like this
Keep us posted.
Doug
'97 M3/4
I have occasionally noted this problem in my car - I've replaced pretty much all the parts on your list except the coils. Given that it improves quite a bit/disappears with new plugs in my car, I'm fairly certain that the coils are to blame.
Crank/Cam sensor would be my other two on the list of 'likely.'
Chris
97 M3
94 325is
12 Jeep SRT8
how much are new coil boots?
mine coincidentally started after i seafoamed the car, which goes along the lines of people say o2 sensors
03' AW E46 M3 -> 15" AP BBK, 19x11 iForged Aeros, V-CSL GTS3, custom tuned by me
98' AW E36 M3 -> 18x8.5 Hamann HM2, Taiwan Coilovers, custom tuned by me
04' RC51 SP2 -> Full Yoshimura RS-3, HotBodies undertail, Lowering link, needs a TUNE
ive had this problem for a while now. its just 2nd nature to me now. lol
I'm coming into this thread late and didn't read all the posts. However, you said your plugs were $1.98 Each? I don't recall exactly what kind I bought, but they were the OEM plugs with 4 electrodes, 8 dollars or so each. I had high RPM mis-fires and the new plugs solved it. Perhaps it's the type of plug you are using?
Shaun
Driving a modified M3 is like dating a supermodel with a bad cocaine habit. It's going to be expensive and ultimately get you in a lot of trouble, but she sure does know how to have fun.
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