MAJOR problem
Junior Member
Joined: Dec 2008
Posts: 378
From: Wading River, NY (Long Island)
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.
Junior Member
Joined: May 2009
Posts: 301
From: Kansas City
Thread Starter
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Beginning Member
Joined: Jan 2009
Posts: 21
From: Massachusetts
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?
Junior Member
Joined: Mar 2007
Posts: 401
From: Shreveport, LA
Don't count on it. I've never seen a faulty coil that causes the truck to barely/not run throw a misfire code.
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.