MAJOR problem
#21
12-14-2009, 07:49 PM
Well, the fuel had a slightly brown tint to it and yes there were little black specks. I'll run a fuel pressure test sometime this week.
#22
12-15-2009, 12:47 PM
Okay, thanks. I have a vacuum diagram, so I know exactly where the vacuum hose is that comes off of the intake manifold.
Alright, I went out to get my repair manual in the back of the truck and took a look underneath at the exhaust. There were some tiny dings in the "Y" pipe but nothing that would restrict the flow. I looked at the catalytic converter. Around the forward pipe it's clamped to, there are two spots where the outside of the pipe is black like it was burnt. I'm sure that's the exhaust leak, but would a few small leaks like that make the truck run like it was?
I tried to start it to see if the hissing was coming from around the catalytic converter, but it just dies almost immedately after a few of the cylinders fire.
Alright, I went out to get my repair manual in the back of the truck and took a look underneath at the exhaust. There were some tiny dings in the "Y" pipe but nothing that would restrict the flow. I looked at the catalytic converter. Around the forward pipe it's clamped to, there are two spots where the outside of the pipe is black like it was burnt. I'm sure that's the exhaust leak, but would a few small leaks like that make the truck run like it was?
I tried to start it to see if the hissing was coming from around the catalytic converter, but it just dies almost immedately after a few of the cylinders fire.
#23
12-15-2009, 05:59 PM
#24
12-27-2009, 10:21 AM
It's been a while, but I've recently replaced the Ignition module, cap and rotor, and all six fouled plugs which needed replacing anyway. A friend of mine whose a mechanic hooked up to the computer to read any codes, but nothing came up. He suggested that it could possibly be those ignition components or the coil, so I replaced everything except the coil so far. It almost starts now, and is a whole lot better than before I replaced that stuff.
Could it be a faulty coil?
#27
12-27-2009, 07:18 PM
Don't count on it. I've never seen a faulty coil that causes the truck to barely/not run throw a misfire code.
#28
12-27-2009, 07:33 PM
I've seen plenty. If the coil outer housing has cracked, moisture will diminish the coils ability to produce the necessary voltage for a proper spark. This can definitely cause misfires.
#29
12-27-2009, 09:55 PM
Tested the coil with a multimeter and everything is within specs. Also took off the EGR valve to see if it was stuck open, but that works just fine.