Grolla42
New member
Hey I have a 98 k1500 with the 5.7l and my idle at a red light is sitting at 550 rpms. My park idle is at 600 rpms. I have a tune up n have a new IAC. I've read it could be fuel pressure problems resulting from either fuel pump, spider injector or even clogged cats; but my emissions 6 months ago came back awesome. Any other suggestions? This is my DD n need to get fixed ASAP. Thanks