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Any Mechanics want to lend a hand?
aero86:
if it rattles like a diesel, sounds like knocking.. that maybe from too low idle. have you tried seeing if the throttle plate is dirty? that can cause a stalling at stop
NTD:
Okay some updates.
I pulled the belt off and the noise went away. Ruled out that it's any part of the engine. Listened around with a screw driver and think it may be the tensioner pulley. But it's still dying and now not always at idle. It seems to die more often on turns though. Maybe a fuel pump/sensor or something????????
Badger:
NTD, when you pulled of the fan belt it may have just made the motor run a tad faster smoothing it out. So you may have not eliminated anything. If it were a pulley it would get louder as you accelerated the engine. Proably something loose like a heatshield as suggested. Have you tried any of the suggestions allready made such as your pcv valve or throttle plate being dirty. Several of us here are proffessional mechanics and see these problems all the time. Steve
aero86:
take the intake tube off the throttle body. if the plate is dirty, it needs to be cleaned. get a shop rag and some carb cleaner. but a brick on the gas pedal, motor off of course ;D. spray just a bit inside the throttle body, and wipe out. repeat that till you get it really clean on the bottom and top of the throttle plate. make sure you get clean were the plate seals inside the throttle body. be sure not to spray too much inside the motor.
Voodoo:
Had a few of these olds in my family with 3.8 or the 3800, the diesel noise might be coming from a tray under the intake, it's pretty common, and a lot of cars were brought into the scrap yard because of it where I was a wrecker driver............take the intake off, it the tray is loose .. replace it, the noise will be gone.... and check the egr first, then cam sensor, and don't forget to get a pressure test on the catalytic converter.....
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