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shawpdx1
09-08-2007, 08:48 AM
the coupe is a pinger not sure why!! idles @ around 20 psi I have done a leak test cant find any vac leaks. new plugs Double plat, new wires, run only super gasoline, get max boost of 8-9, new belts, SC makes no un healthy noises Im baffled what gives? any suggestions?

thunderkid84
09-08-2007, 09:55 AM
maybe try a can a fuel injector and systme cleaner ?

seafoam worked great for me.

shawpdx1
09-08-2007, 10:16 AM
Good thought I'll try some sea foam

Joisey Jim
09-08-2007, 11:52 AM
When did you last change your fuel filter ?. I had that problem on just my '93 5 speed (my '90 5 speed and '94 auto were no problem) and had to change the filter every 15k instead of 30k - strange but it worked, just very sensitive to fuel pressure. You might also make sure your knock sensor is connected, although I would think you'd get a CEL.

95MTSC
09-08-2007, 01:52 PM
Could also be clogged cats. If you rap them with a rubber mallet and you can hear loose chunks inside, then they are bad.

sail7seas
09-08-2007, 03:50 PM
An interesting test would be to pull the Octane plug and see if you still get pinging. (Octane plug is located at passenger side firewall)