artstutts
06-19-2009, 10:27 PM
Why would my '91's TPI 5.7 ltr run great for 10 minutes after a cold start but then start to idle rough and try to die when I give it throttle? It starts to knock also. Ive replaced the ECM and the O2 sensor. It does not throw any codes so Im shooting in the dark. My next guess is to replace the EGR valve but Im tired of just spending money on parts that arent bad. Can anyone help?