I thought I finally had it....Stumbling Acceleration
07-23-2014, 11:05 AM
#31
Drifting
Thread Starter
I was more so thinking about the wiring to the O2 sensor.
I think I have a narrowband a/f gauge that you can have for the price of shipping if you want it to check out what the o2 sensor is indicating.
I wouldn't worry about the routing of the ignition wires too much if you used OEM parts. Remember it runs fine at WOT...so you are chasing something that is only an issue when the ecu is reading the AFM and o2 sensor and you are asking for power.
On an N/A there shouldn't be too many places for vacuum leaks.. Is the idle screw still in the top of the throttle body? The o-ring can get old/brittle/leaky. Easy to check by putting your finger over the top of it.
Good luck
I think I have a narrowband a/f gauge that you can have for the price of shipping if you want it to check out what the o2 sensor is indicating.
I wouldn't worry about the routing of the ignition wires too much if you used OEM parts. Remember it runs fine at WOT...so you are chasing something that is only an issue when the ecu is reading the AFM and o2 sensor and you are asking for power.
On an N/A there shouldn't be too many places for vacuum leaks.. Is the idle screw still in the top of the throttle body? The o-ring can get old/brittle/leaky. Easy to check by putting your finger over the top of it.
Good luck
08-06-2014, 07:37 PM
#33
Drifting
Thread Starter
Well, I did check the connections to the DME connector and they were good. If it's AFM, I'll have to look deeper into that. This has all been very puzzling. Good thing is that I'm learning a lot about my car I didn't already know.
08-07-2014, 01:29 PM
#36
Burning Brakes
I'm right there with you, brother. I've been fighting my dying issue for almost a year now, but I sure have learned a lot about the car. Now I'd really like to drive it...
08-08-2014, 07:24 AM
#37
RL Community Team
Rennlist Member
Rennlist Member
Today I spent 2 hours working on fixing the power mirrors on a friend's 964. I confirmed the functionality of the mirrors, the hat switch, and the side selector switch. Finally I traced every wire and found a broken one in the door jamb rubber boot. 
Did you check continuity of every wire to the DME plug?
Did you check continuity of every wire to the DME plug?
08-08-2014, 11:18 AM
#38
Drifting
Thread Starter
Today I spent 2 hours working on fixing the power mirrors on a friend's 964. I confirmed the functionality of the mirrors, the hat switch, and the side selector switch. Finally I traced every wire and found a broken one in the door jamb rubber boot.
Did you check continuity of every wire to the DME plug?
Did you check continuity of every wire to the DME plug?
08-17-2014, 04:37 PM
#39
Racer
Join Date: Oct 2010
Location: Easton, MD
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Triple 7, Did you find the problem?
I had the same symptoms on Wednesday after changing the AFM and DME for later year units. Each time the stumble came the AFR was way lean, in the 17:1 range. Changing throttle or WOT would clear it momentarily.
Turned out to be the AFM wires at the AFM connector even though they appeared good and I had cleaned all contactors during installation.
I had the same symptoms on Wednesday after changing the AFM and DME for later year units. Each time the stumble came the AFR was way lean, in the 17:1 range. Changing throttle or WOT would clear it momentarily.
Turned out to be the AFM wires at the AFM connector even though they appeared good and I had cleaned all contactors during installation.