I have a 95 k1500 5.7L with 360,000 miles or so. I have issues with a code or two I can't figure out. Here goes, I bought the truck with high highway mileage and it ran. I was told it was the original engine but the tranny had been changed once. The truck ran but had an erratic idle at stopped speeds. There was a TDC 44 showing as well. I know a decent bit about this stuff so I started with the O2 and IAC valve, replaced them. Problem remained. I then went to the TPS and still no luck. Next were fuel and air filters, fuel injectors, pressure regulator. Nothing seemed to fix this problem. EGR finally popped into my head so I sprayed some stuff sround it and sure enough the diaphragm was cracked. I capped the ports and plugged the vacuum line and the erratic idle was gone but the code was not. Still I have a Lean TDC 44. A couple days ago I repaired a broken exhaust manifold that I knew could be the problem but it was not. I rechecked my codes and also found a fuel pump signal TDC 54 along with 44. 54 is new on here that I know of. I don't know whyit came up because the description tells me that the pump wouldn't be running for 2 seconds atleast and the truck doesn't stall or cut off. I did find out the converter was emptied also. I am down to thinking my problem is with an internal intake gasket leak, ECM, or possibly the fuel pump, maybe even the new O2 sensor since the very rich conditions may ruined it. Please help with this problem. Thanks in advance
have the same problem?
Saturday, November 17th, 2007 AT 9:17 AM