Not idling smoothly, sometimes having to restart at a stop w/ tranny in drive.
This problem just popped up out of the blue. It seems to have happened when I parked the car at a store, came out to restart and the problem was
there. I turned the ignition off and on again and prob. went away for a while.
Then one day, about two weeks later, went to start car and would not idle
smooth. Real rough. With a tap on the accelerator pedal it would smooth
out and idle high, then gradually come down to rough idle again. I did find
out though that the problem diminishes when the engine warms up. Could
this be a TPS (throttle position sensor) problem?
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try U joints or check all you heat shielding on your exhaust it might be harmonic. My 96 300zx rattles alot when i give it some gas and it sounds like tranny but the trans seems to be smooth for the most part and the clutch is relatively new. also check your trans mount. i've seen bolts get loose and it wont knock but it will rattle.
Sometimes spray lube on linkages & bushings down at the transmission & at areas where you see movement during shifting, will cure that, otherwise you may need some new bushings at certain areas. Have someone move shifter while you observe different pivot points for too much slop. (movement)
The same thing happened to my 2000 dodge stratus about a month ago. Turned out my belt had broken sometime. Anyway, the car would crank and run until it got warm (10-15 miles) and then would not shift out of low gear. I got home and thought it was my alternator, but when I went to take it off to replace it I realized there was no belt. (The belt runs several key components that will not allow you to go far without.) So just to rule that out you might want to check to see if the belt is still in place.
It sounds like the fuel pressure regulator is leaking. This is easy to check. with the car idleing, remove the vacuum hose from the unit, and if it is leaking, gas will come out of the vacuum connection.
If this is the trouble, be sure the replacment unit has an o-ring with it, otherwise the new unit will leak at the fuel rail.
This could be the map sensor issue as well, but check the pressure regulator.
Also, check the hoses near the throttle body area, if there is a vacuum leak, it will do this.