Misfire after head replace

[McSpooney]

Originally Posted by ike84

If your coils are cracked they all should be replaced. Generic ones are ebay are cheap and I've been running them for a year without issue. I would start there.

The injectors can fail. Most commonly they get stuck open. A sign of this is if your oil smells like gas - just pop open your fill tube and take a whif. If you replace them, swap them all. The ef-1 style Bosch injectors for 03-04 are cheap. Kinda pita to swap though with the air box and sai in place.

You may want to do a vacuum test to make sure it looks good. Smoke tests are not always reliable. Blue62 has written some great posts about doing this type of test.

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Ahhh... i guess I'll drop the cash... I just try and take pride in not 'throwing money at the problem'.

The fill oil fill tube smells very oily... no gas for sure. If it were stuck open... I think I would see it in the O2 or RKAT values on durametric?

I'll prep for a vacuum test tho.

[ike84]

Originally Posted by McSpooney

Ahhh... i guess I'll drop the cash... I just try and take pride in not 'throwing money at the problem'.



The fill oil fill tube smells very oily... no gas for sure. If it were stuck open... I think I would see it in the O2 or RKAT values on durametric?



I'll prep for a vacuum test tho.

Not necessarily. The injectors tend to stick open. Your may see rkat deviations but not always, depending on how bad the leak is. You can use the durametric to test each injector, turning them off 1 at a time while the car is running, and see if it makes any changes. The logic here is that a functioning injector will shut off when told to do so and make the engine run rough, an injector that is bad will not respond/effect any overall change in engine behavior when it is good to turn off.

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