Kingman Posted February 11, 2010 Share Posted February 11, 2010 (edited) I've been having a weird starting problem going on now for a few weeks. The truck will start fine when it's cold, but when it's warmed up sometimes it will either: A) Sort of start, to where I can see the tach barely move then die. B)Start at 500RPM, and then slowly raise to normal warm idle (800RPM). C) Start completely normal. Engine catches and revs to 1200RPM smoothly and then drops back down to idle, like it should be doing every time. D) Start the same as C, but instead of dropping back to idle it just dies. If does A, then it will crank for a while longer before it sputters to life. Stepping on the gas seems to help but I'm not quite sure. However, when it acts up it'll start and run within 3 tries. It did do something weird yesterday though, it started fine but idled up to 1600, exactly where it idles to when it's completely cold. I hit the gas and it idled normally. I thought that was weird, indicator of a sticking or problematic IACV? I thought it may have been a fuel filter so I replaced that but it didn't help. Plugs, cap, and rotor are new. I cleaned the MAF sensor and connections as well, no change. The computer isn't throwing any codes and according to the Snap-On unit the MAF sensor, O2 sensor, and TPS sensor are working perfectly. Once it's running it runs perfectly fine. Any ideas? Edited February 11, 2010 by Kingman Link to comment Share on other sites More sharing options...
Cuong Nguyen Posted February 11, 2010 Share Posted February 11, 2010 Faulty connection at MAF plug? I deal with the same problems from time to time every time. Never got around to fixing it. Link to comment Share on other sites More sharing options...
Precise1 Posted February 12, 2010 Share Posted February 12, 2010 Have you checked the ECU codes?? B Link to comment Share on other sites More sharing options...
Kingman Posted February 12, 2010 Author Share Posted February 12, 2010 Have you checked the ECU codes?? B The computer isn't throwing any codes I plugged the computer back in yesterday in shop and every test came out perfect. However, I was fiddling with the MAF sensor and wiggling the wiring made it run different or killed it. So I took the connections off and talk about corrosion! I cleaned every prong and socket off real good and now wiggling the wires doesn't change anything. But...the problem is still there. Link to comment Share on other sites More sharing options...
Precise1 Posted February 12, 2010 Share Posted February 12, 2010 LOL Brain fart. It's usually the first thing I ask as most people seem to forget to... B Link to comment Share on other sites More sharing options...
Kingman Posted February 14, 2010 Author Share Posted February 14, 2010 Well, it randomly stopped doing it for now. It starts perfect every time... Hmm... Link to comment Share on other sites More sharing options...
GrimGreg Posted February 15, 2010 Share Posted February 15, 2010 Mine (88)is doing something similar, but it is also surging while idling. I had checked my MAF last spring and cleaned up the connections.... Link to comment Share on other sites More sharing options...
PATHRIDER Posted February 15, 2010 Share Posted February 15, 2010 will applying contact grease on it help? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now