You’re telling me man! I thought I had the problem solved. Everything I’ve seen and videos similar to mind show the fuel pump or injectors. Replaced those and still have the issue.
Warm Start Problems
- Thread starter mcsc1
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Found this on another thread. Anyone think this could be an issue I should check?
Your fuel trims would show a very rich condition on both banks and it would run like poo all the time, probably. But it's not a bad idea to look at what the scanner reports and reset the alcohol content, if not using more than E10 fuel.
so you changed the injectors already? the only cheap way I can think of to check the injector is like said earlier, swap it another spot and see if that fuel smelling plug follows it.
do you have the old injectors around still? maybe could clean one and swap it in as a test? only thing I can think of to cause a injector to spray more than the ecm says to it a short to ground somewhere in a harness? I believe they are switched grounds and constant power?
do you have the old injectors around still? maybe could clean one and swap it in as a test? only thing I can think of to cause a injector to spray more than the ecm says to it a short to ground somewhere in a harness? I believe they are switched grounds and constant power?
It’s possible and I’m unsure how to go about finding the ground in the harness. But the injectors are warrantied, I can get another through that warranty.
Fuel trims might say something. You can use a noid light to see if the injectors are being pulsed. An injector balance test, using a bi-directional scanner, would show an injector that wasn't working properly (too much, too little fuel metered). Neither of those tests, however, would tell you if the ECM was pulsing them properly.
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I have a 2009 Tahoe 5.3 2wd with 189,000 and I just brought it to my mechanic to change a spark plug and he only replaced one and said the others are fine but about 2 weeks later im getting a cyl 4 misfire but engine seems to run perfectly besides a little rough at idle. I dont have a spare maf sensor but if I unplug it and the engine light disappears does that mean its the sensor?
One spark plug, really!
no telling without getting some readings on it with a scanner, when it is unplugged the vehicle runs in a default mode. I can say that after 160k the maf are known to/or can go goofy and can cause all kinds of problems. just throwing parts at it is a gamble, sometimes you win and sometimes you dont.
my thoughts exactly, who does that? unless you know the plugs are fresh and 1 happened to crop up with a problem.One spark plug, really!
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