Fuel injector pulse driver
10-13-2006, 07:08 PM
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Fuel injector pulse driver I am having a problem where #3 cylinder runs rich, and dry fouls the plug
Is is possible for the pcm injector driver for one cylinder be bad?
I found that my #3 plug was sooty black when I was changing plugs.
SO far I have
swapped coils
swapped injectors
changed wires
I believe it is gas related due to this:
I left the injector in the cylinder, but took the wire harness off of it, and put a new spark plug in, and started the car.
I drove the car, and when I checked the plug again it was completely clean.
This ruled out an oil issue, or ring problem
Back to the fuel pulses.
How can I check to see if the injector is pulsing properly?
I called my tuner and explained the situation, and he said that he can not control individual injectors, just banks of injectors.
I read online that I may have a PCM problem, could that be?
Could the fuel injector driver be bad?
Is the driver replaceable?
Where is it located?
Does it sound like I have a bad PCM?
I waited to post unitl I really have exhausted all other avenues of knowledge.
Any help would be great!
Other things done to try to solve problem:
I added a catch can and breather
Pulled the intake to see if it was cracked
Checked pushrods and springs
Replaced the valve stem seals
Is is possible for the pcm injector driver for one cylinder be bad?
I found that my #3 plug was sooty black when I was changing plugs.
SO far I have
swapped coils
swapped injectors
changed wires
I believe it is gas related due to this:
I left the injector in the cylinder, but took the wire harness off of it, and put a new spark plug in, and started the car.
I drove the car, and when I checked the plug again it was completely clean.
This ruled out an oil issue, or ring problem
Back to the fuel pulses.
How can I check to see if the injector is pulsing properly?
I called my tuner and explained the situation, and he said that he can not control individual injectors, just banks of injectors.
I read online that I may have a PCM problem, could that be?
Could the fuel injector driver be bad?
Is the driver replaceable?
Where is it located?
Does it sound like I have a bad PCM?
I waited to post unitl I really have exhausted all other avenues of knowledge.
Any help would be great!
Other things done to try to solve problem:
I added a catch can and breather
Pulled the intake to see if it was cracked
Checked pushrods and springs
Replaced the valve stem seals
Last edited by Jed Z06; 10-13-2006 at 08:06 PM.
10-15-2006, 07:20 PM
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You can buy an injector test light at most auto parts stores. It will plug in in place of the injector and will flash if working properly. Do not attempt to do this with a regular test light as you can (and will) possibly burn up the injector driver circuit.
