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View Full Version : help!! all advice taken


ERHsn95
06-11-2012, 08:07 PM
well guys i have an intermitant problem with my 95 gt every time i think i have a fix. it comes back in a week or less it has a crazy surge and backfire at 3000 rpms and the tac bounces every where i cant track the problem down any body have any ideas

btw i just put new plugs and wires and msd dizzy and coil in thinking it was an ignition issue and that didnt work also i put a new egr valve on and that didnt do the trick. its definatly not a cloged cat becuz i put off road pipes on to test that. im not sure what to do next i love the car i just want it to run right.
Erics89GT
06-11-2012, 08:11 PM
IAC maybe....if its surgeing for an idle or loose vacuum.....i know your pain im going thru something similar with my 91
AutomagicSN98
06-11-2012, 08:34 PM
Does it only happen at 3k rpms? Aftermarket CAI?
jaa55
06-11-2012, 08:45 PM
change the ignition module yet?

It cant be the IAC it only controls idle if its happening at 3k.....when you say the tach bounces is it realistic, like the engine is just losing RPM or is it erratic?
SK@StreetLethal
06-11-2012, 08:50 PM
change the ignition module yet?

It cant be the IAC it only controls idle if its happening at 3k.....when you say the tach bounces is it realistic, like the engine is just losing RPM or is it erratic?
Second that tfi problems are a pain. If not check the harness connections for corrosion.
John4cam
06-11-2012, 09:05 PM
bad ground?
wick
06-12-2012, 07:36 AM
Tach bouncing is PIP signal. Msd distributers are known for their issues in those cars. Pit a stocker back in and start from there. Tfi also. Try the EXACT one for your car. Also, as John said...ground.
ERHsn95
06-12-2012, 10:31 PM
Thanks for the replies guys and well its eratic and only happens at three grad or above i havent checked the ground yet but i have been having other spuratic electrical glitches but i was more worried about this issue and was putting checking them out till later but maybe its all part of it i feel stupid asking but wat is the tfi everyone keeps talking about
jaa55
06-13-2012, 06:59 AM
its the ignition module. it was on the distributors in the older 5.0s....yours is remote mounted and looked like this....

http://www.motivetechnical.com/images/tfi.JPG