lynzahh4

I have a 2000 Acura Integra GSR and recently started having issues with random misfires.
We've replaced the plugs, plugwires, battery terminals, and the distributor.
We checked the vaccum, did a compression test, checked the fuel injectors, and the TPS.
Nothing we've done has fixed it and all the tests came back as perfect.

The code its throwing is random on all 4 cylinders. Sometimes we can feel it hesitating, but other times it drives perfectly.

Any other ideas on what it could be? I've been told bent valves, but wouldnt that make it run rough all the time, not just sometimes?

Fabrik8

Coil?

The Guy

HAHAHA That was my very first thought.

lynzahh4

yea, we've replaced the coil.

Hatchman83

it are not your valves, sounds like something with the distributor. What engine code is it throwing?

D1NONLYJV43

ya deff. not your valves.. if it was your valves you would have seen that there was a problem in your compression test n you wouldnt be asking this question now... first thought is igniton coil in dizzyyy.... but more then likely just replace whole dizzy. and guarentee your problems lies there.....

D1NONLYJV43

also make sure its not leaking any kind of gas on the intake manifold from a fuel injector cause also a rip in the o-ring on a fuel injector can do this as well n cause that ive had it happen......

6CYLINDRSYMPHNY

Fuck the ECU.



Throw it away and tell it you won't pay for micro chips.



Buy another.

Fabrik8

Let me help you with your reading comprehension....

Fabrik8

An injector O-ring failure on one cylinder won't cause random misfires on the other three cylinders. Unless the massive amount of misfire-causing fuel gets bored and decides to go up one intake manifold runner and down a different intake manifold runner. Maybe it likes to cause mischief.

Seriously though, if the coil is known-good, and the distributor is known-good, and there aren't any stored faults for position sensor faults (crank, cam, etc), and you're feeling hesitation sometimes, I would suspect the MAP sensor or intake air temp sensor. You've already replaced the likely suspects, so I'd look elsewhere unless the problem is consistent enough to be able to track down wiring faults, etc.