Engine Idles funny! - Third Generation F-Body Message Boards

Shadyredeyes · 08-26-2009, 09:35 PM

Got an '88 Camaro with a 305 TPI. Sometimes when I first start my car the engine jumps from about 1000 R.P.M. to almost dying, then jumps back up again. It doesn't do this all the time but it does happen every so often. Installed new high pressure fuel pump not long ago, but it did this before that as well. Any suggestions would be greatly appreciated.

Rolling Thunder · 08-28-2009, 11:00 PM

Check your EGR valve for proper operation. I find the EGR valve is the number one cause of a surging idle.

3rdgenred · 08-29-2009, 06:49 PM

Would you still think its the egr valve even if when you start your car its idles at 1000 rpm for about a minute then comes down to normal operating range (650-600)?

Shadyredeyes · 08-30-2009, 12:07 PM

Mine does the same thing.

Rolling Thunder · 08-31-2009, 01:35 AM

Yes i still thing the egr would be my top guess.