Need help

GT Rob · Jun 8, 2013

Well I replaced coil spark plugs and wire cap and rotor. ignition module.cleaned everything I can . So it still running rough took it out for a drive and when driving it wants to turn off and When i come to a stop it'll feel like it wants to die so I'll trun the A/C on so it doesn't die cant figure out why ill be taking it to the auto parts to pull the codes. I figure ill ask you guys to see what you guys come up with. Here's my mods coldair intake shorthy headers xpipe no cats thanks guys for any inputs

toyman · Jun 9, 2013

Clean the MAF sensor by removing it from the housing and spray with MAF cleaner or equivalent. Most auto part stores don't know where the correct DTC is located on the 94-95 GTs. It's in the engine bay on the passenger side strut tower towards the firewall. It's an OBDI system. The under dash port is for the 3.8L OBDII system.

GT Rob · Jun 9, 2013

Took it to O Reilly and had these codes come up. Dtc:539 and Dtc:542. He said one was some thing to do with the A/C and the other was fuel pump

toyman · Jun 9, 2013

Having a read on fuel pressure would help. May be as simple as a clogged fuel filter but the 542 code indicates an electrical issue in the fuel pump circuit. Check voltage at the fuel pump.

white95 · Jun 9, 2013

Could be a corroded ground at the ECU in the kick panel. Incorrect voltage can wreak havoc in these cars.

GT Rob · Jul 28, 2013

Got it fixed just to give The heads up on what is was. After changing just about everything under the hood turned out to be the vacum hose that goes to the lower intake had came off . So If anybody is having trouble with the car running rough check that hose first