2000 series 2 3800SC into 86 GT. car would start and run fairly decent, then, it started to make a "Scraping noise" ONLY when put in DRIVE, Not in reverse or park,neutral (standing still ). noise stopped as soon as out of drive. I looked for a belt or pulley touching something when put in drive, NOTHING.took belts off and checked all pullys. then today all of a sudden starts running rough and died.(In Park) would not restart without the throttle at least half OPEN. (like it flooded). I just took out, checked and cleaned ALL the Injectors last week. OBD2 show "NO Codes". has new IAC. all vacuum lines hooked and no cracks. what could the NOISE and problem BE, ONLY IN DRIVE ?? I'm assuming both the " scraping/ sucking Noise" and the "seeming" Flooding are connected. Any Ideas ? really strange. thanks for any help
Have you recently removed the throttle body? Any vacuum leaks around the gasket? I have had a similar sound in the past with air sucking past the TB when not sealed properly- and perhaps this would also explain the stalling...?? When you put it in Drive, the RPM drops, perhaps causing the stall due to vacuum problems?
My E250 Ford van does that on cold mornings. Put it in drive and a heat shield under vehicle starts vibrating. Won't do it in reverse or neutral. Strange... I've got to get under there and bend that heat shield into position away from what its rubbing against. Once warmed up it doesn't vibrate or rattle anymore.
My wife ran over a dead deer some years ago, in the middle of the night,with her Ford Fusion and at 1500 rpm a bent heat shield would vibrate. I bent it back into position with my bare hands. End of problem.
Spoon
------------------ "Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut
no, it is a "scraping" sound (like if a spinning pulley was touching something), but it's not. cross between a major vacuum leak (sucking kind of noise) and scraping.
Is the scrapping when the car moves or just in gear with foot on brake??? I ran into issue with n* swap 1 torque converter bolt had backed off a little and made one hell of a noise when in Drive.
Check your motor & transmission mounts. My theory is with foot on brake while in drive the motor & trans or exhaust will torque or tilt to one side and rub against something. In reverse it will tilt away and touch nothing. In neutral there will be no tilting.
I had similar thing happen on a Jeep of mine due to a bad engine mount and only in drive while taking off under mild acceleration. Turn out to be fan rubbing the shroud. I know a Fiero has no fan shroud in the engine bay but you get the idea.
If all else fails, you could try a neutral drop at a predetermined rpm to remove any doubt. You did mention the transmission was new, right?
Spoon
------------------ "Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut
