94BLKCOBRA

i have a 94 cobra that idles very poorly, it seems like the local mechanics cant get it right. i had the computer scanned and it came up with no codes, but it displayed throttle position sensor out of adjustment. so i replaced it and still a poor idle any where from 1000rpm's to 400rpm's. all gaskets from the cylinder head up are new and the are no cracked vacuum hoses. there is no check engine light on. does anyone have a answer? thanks.

89muscle

grounds, grounds, grounds. maybe coil and ignition.

94BLKCOBRA

do you think grounds could cause stalling as well? it stalls when i stop or turn the wheel hard at a stop. also if let of the gas at low driving speeds you can feel the car jerking.

Pitviper100

could be the fuel filter

94BLKCOBRA

nah, i already replaced the fuel filter.

89muscle

did you try your ignition module?

94BLKCOBRA

i think i'll check that igniton module, thanks!

94BLKCOBRA

Checked the ignition module and coil yesterday at autozone ,they both checked out to be good, aslo i checked the egr with a vacuum pump and that was holding vacuum, i think i'm runnin out of ideas, could use some more help.

mdvaldosta

Fuel, Ignition, or Compression</P>


The basis of all diagnosis</P>


Fuel: check to ensure you have the proper fuel pressure and mixture</P>


Ignition: solid strong spark at the right time</P>


Compression: Cylinder pressure, cranking and holding. Biggest factor are things like head gasket, valve seating, rings, and cam timing.</P>


Take the car to a different mechanic. Diagnosing problems and swapping parts require totally different abilities, most "mechanics" can only swap parts.</P>

94BLKCOBRA

Thanks i think i'll go from here, and see what i get.