Engine Performance problem
1989 GMC S15 6 cyl Four Wheel Drive Automatic 163000 miles
Hi, I have a idle problem. When I start up my truck it idles up to 1500 rpms then after a minute or 2 it goes down to about 900 rpms. I have change o2 senser, IAC, Dis, rotor, plug wires, spark plugs, fuel pump, fuel pump relay I've also change the manifold gasgets on because I thought that was the problem but then I seen that theTbi unit gasget was rotted out so I repleced that. I would thank you all if u can help me out.
have the same problem?
Saturday, August 30th, 2008 AT 4:03 PM