Could a dirty throttle body be to blame on my 850?

[franckfolk]

I've been through a few round of repairs with fuel problems. Everybody's response to my prior posts was helpful. Thanks. Unfortunately, my problems persist.

To recap: My 1994 850 stutters and apparently burns too rich every few days or so. This seems to happen in colder temperatures. On warmer days -- say over 60 degrees -- it will stall out entirely. And yes, I've read the stalling posts. The car is also slow to start about half the time.

I started with a new cam sensor, which seemed to improve general performance, but not the core problems. I followed with a fuel pump relay, which did nothing. Should I clean the throttle body next?

I wonder whether the cleaning could solve both problems. I see how it's tied to the stalling, but has anyone found that a dirty throttle body causes the car to run too rich?

One last clue: in the past few days the gas pedal has begun to stick from time to time. Is that yet another sign that the problem is the throttle body?

Thanks for any help -- this site has been invaluable so far for someone that's two hours from the nearest dealor.

[dosbricks]

If the gas pedal sticks when you initially press on it, that's definitely caused by a dirty throttle body. It's an easy fifteen minute job to clean the TB with a spray can of TB cleaner.

TB's that have caused the stalling issue are the 1999 and up electronic type, I believe.

Check all your rubber vacuum elbows. A vacuum leak will cause the ECU to compensate for the extra air by enriching the mixture....a situation that will eventually spell death for your O2 sensors. By the way, vacuum leaks don't always set a code either. Good luck.

[matthew1]

I'm with DOS on the vacuum lines. Either that or bad mass airflow sensor. Sounds like the fuel/air is getting metered incorrectly.

That is, if it's not suspect #1, throttle body.