Hello all,

It's been a while since I've logged on here. My '95 940T has a peculiar problem. The first time I try to accelerate up to normal speed after a start up the engine stumbles/hesitates a fair bit. If I then step on the throttle it'll stumble/misfire for another second or so and then it just takes right off accelerating quickly. Thereafter, the car will run and accelerate normally with no more stumbling or hesitation. It doesn't matter if the engine was hot or cold when I started it.

Anybody else have this happen ? Any ideas as to what's causing this problem ?

Thanks in advance.

Check this out in the 700-900 FAQ's:

http://www.brickboard.com/FAQ/700-900/EnginePerformanceSymptoms.htm#NoStartFrequentStallorHesitationBasicDiagnostics

Specifically the "Hesitation on Acceleration; Several Diagnostic Checks" section.

It sounds like the issue for you is the transition from idle (closed loop) to accelerating (open loop) so there is the additional possibility that the O2 sensor heater is not doing its thing.

Start with the maint stuff if it has not been done lately:

Change wires, cap and rotor if they are old or age is unknown.
Clean the TB and IAC and chaeck very carefully for vac leaks if it has been more than 10K since you have done so
Check the FPR by disconnectiong the hose (not definitive) and smelling for a gasoline odor

If none of that works, you are probably looking at an O2 or AMM issue.

Onkel Udo