Losing power and bogging down.

[mazenz]

been so busy lately i have no time to give these things a try. ill let you know asap how it goes. although, my 02 sensor is only 5 months old :lostme:

[arvzs1]

thanks, let me know if the O2 will cure it...just curious!

[mazenz]

finally narrowed it down to faulty ground. thanks for all your help guys! never woulda thought of that on my own.

[Mmark]

Originally posted by mazenz
finally narrowed it down to faulty ground. thanks for all your help guys! never woulda thought of that on my own.

Where was the faulty ground? Batt neg??
m

[mazenz]

its closer to the engine on the passenger side.

[Mmark]

I think the engine tugs quite a bit on that cable, especially if the engine mounts are getting old.
I added a second longer cable ground to that side of the engine JIC.
In an old car, you can never go wrong by adding ground cables.
m

[Todd black 88]

Bumping old thread due to similar problem. Very intermittent.

Allright folks, I need a little help here. Sorry for the length of this but more info the better usually.
I am having a little trouble with the M3 here that I can't seem to figure out.
Last saturday, i picked the car up from the shop after a valve adjustment, and everything seemed fine. Drove about 20minutes, and the car responded fine, then it stalled in the tim Hortons drive through. Restarted right away, but sounded rough for about 5-10 seconds and then was fine again. drove out of the drive through and about a block down the road, when i shifted into second, it bogged right down, and sputtered. I shifted back to neutral and tried to keep it from stalling and I managed to and it cleared up. Drove the rest of the way home(5 min) no problem. Sunday, no problems. Drove the car from my house on the northshore to Mission raceway,70 miles or so, tracked the car on and off for 8 hours, no problems. Drove home and when i got to stop/go traffic about 5 miles from home, it bogged down again and tried to stall again. i was able to shift to neutral and blip the throttle a few times to save it, and then drove the rest of the way home with no problems.

Any ideas where to start?
New parts installed within the last 1000k
cap/rotor/wires/coil
coolant sensor
both fuel pumps/fuel filter/air filter
intake boot
Also my car doesn't run AFM runs Miller conversion but its not new.

TIA
Todd

[EVOIIIM3]

Bumping old thread due to similar problem. Very intermittent.

few times to save it, and then drove the rest of the way home with no problems.

Any ideas where to start?
New parts installed within the last 1000k
cap/rotor/wires/coil
coolant sensor
both fuel pumps/fuel filter/air filter
intake boot
Also my car doesn't run AFM runs Miller conversion but its not new.

TIA
Todd

Start with the plugs, pull them out & take a look, they might be fowled. Then just check all the connections on things you swapped out.