Weak Spark Conundrum
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Mountain Pass
Joined: Jul 2012
Posts: 116
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Update!
Ignition Control Module came in and I finally got a chance to install it. The truck now runs much better. Not perfect, but better. I've got some vacuum leaks to chase down and I've got a sneaking suspicion that the injectors may be sticking open, but I need to obtain a fuel pressure gauge to check that. So in conclusion, ICM's do not always completely fail, they can just cause a weak spark.
Ignition Control Module came in and I finally got a chance to install it. The truck now runs much better. Not perfect, but better. I've got some vacuum leaks to chase down and I've got a sneaking suspicion that the injectors may be sticking open, but I need to obtain a fuel pressure gauge to check that. So in conclusion, ICM's do not always completely fail, they can just cause a weak spark.
Lead Driver
Joined: Jun 2013
Posts: 5,654
Likes: 1,158
From: Tolland, CT
Maybe a can of can of this in the gas tank will help clean the fuel system. I split a couple of cans each Fall in my tanks.
http://Berryman Products 0116 B-12 C... (Single Unit)
http://Berryman Products 0116 B-12 C... (Single Unit)
Lead Driver
Joined: Jun 2013
Posts: 5,654
Likes: 1,158
From: Tolland, CT
Another thing to think about would be to put a new fuel filter in the reservoir under the cab. I replaced mine when I could feel the truck starve for fuel while driving. I bought a new housing as mine cracked while unbolting from the frame rail. I used a chain wrench to rotate the cap off it. If you can spin the cap off, NAPA has a great filter for about $12.00.
There are a few small things you can do to help it run better.
There are a few small things you can do to help it run better.
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