Cylinder 4 misfire

[JesseJames614]

My 96 LX is sick. #4 cylinder isn't firing. I've checked injectors, changed the wires, button, cap, plugs and coil. Please help!!!

 

[JesseJames614]

Compression test the cylinders.

Wouldn't compression effect more than one or two cylinders?

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[JesseJames614]

Your engine can lose compression in 0, 1, 2, 3 or 4 cylinders.

I'm only asking because I don't know. How would this cause a misfire?

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[JesseJames614]

If it happens to be the cylinder, what is there that can be done? With a motor with close to 300xxx I can't see rebuilding it.

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[JesseJames614]

Ok. I only see one more test that canbe done and that is compression.

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[JesseJames614]

I pulled the injector plugs to check for change in idle as well as plug wires. Checked the resistance in injector wires all are at 13.5. Its blowing a lot of white smoke from the tail pipe which I'm assuming is fuel that isn't being burnt. Number 4 plug was the worst with a little burnt oil when I changed them.

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[JesseJames614]

Cel codes. Misfire on cylinder 4 and 2 and random misfire. I've checked for spark at the wires. All spark except for 4.

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[JesseJames614]

So, do you think no spark at plug 4 is relevant?

And you didn't think mention of misfire in cyl 2 and random misfire was also relevant?

Misunderstanding. I assumed that cylinder misfire would cause it not to spark. And I checked #2 plug and it seemed to be firing fine. Didn't think it was important.

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[JesseJames614]

Misunderstanding. I assumed that cylinder misfire would cause it not to spark. And I checked #2 plug and it seemed to be firing fine. Didn't think it was important.

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No more suggestions?

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[JesseJames614]

The new information should have been included in the first post. Is there any more potentially relevant information that you haven't shared?

Can I assume that the engine runs?

Yeah it runs.

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[JesseJames614]

Yeah it runs.

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I drive it every day. My only ride got now. 50 miles each way to work.

 

[98civlyfe]

Cap and rotor?


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[JesseJames614]

Cap and rotor?


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Yes. They are both new.

 

[98civlyfe]

Yes. They are both new.

Sounds like a fuel injector that could be stuck or wiring issue with injector. Possibly


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[JesseJames614]

Sounds like a fuel injector that could be stuck or wiring issue with injector. Possibly


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I've checked the injectors with a ohm meter. Checked out.

 

[Otto85]

So you replaced the cap rotor ignition coil plugs and wire? And no spark to cylinder 4 misfire in cylinder 2 and random misfire code? Are you sure the new coil is good, id test it if it ohms out like its suppose to then remove the icm from your distributor and take it to a auto parts store to be tested

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