Re: engine stumble question

[rwcohn@chinet.chinet.com (Robert W. Cohn)]

> 
> Here's one that someone might be able to shed some light on. I have an '81 Coupe
> with 93k miles. In general, the engine runs very well and very smoothly.
> Lately, however, there's been a bit of "stumble" when accelerating from idle.
> It has nothing to do with the clutch. In fact, if I let the car idle in neutral
> (at about 1000 rpm) and gently depress the accelerator, just as the tach needle
> begins to move up, it suddenly makes a quick drop to about 700 rpm then back
> up. This stumble happens about 50% of the time. I *think*, but am not yet sure,
> that it is more prevelent when the radiator fan is running.
> 
> Any thoughts?
> 
> Thanks,
> Rob




Vacuum leaks and bad grounds.