my first problem misfire on cylinder #4

[Justin35ll]

Okay so I was driving my car all day today no problems rippin on it everything is running great. A few hours ago I left my friends house and drive around, get gas, drive around for about 25 more mins. Get back to my friends house, get out of the car and leave it idling. Went into my friends house for 5 minutes max, come back to my car to go home and can tell by the sound of the exhaust it was misfiring.

So next thing I do is pop the hood pull the injectors and sqaure it down to cylinder 4.Drive it home pull it in the garage (after hitting a pile of bricks the damn construction guys left right next to the garage door leaving scratches and very small dent on the quater panel grr)So I pull the spark plugs and coil packs out of cylinder 3 and 4 and swap them still have a missfire in cylinder 4 so I'm assuming the plug and coilpack is good.It is getting plenty of fuel. I tried back probing the coil pack harness to see if it was getting voltage to the coil, but it was hard to do myself and I wasn't able to do it. Can anyone explain to me how to check for voltage at the coil pack? Or what the voltage should be at least.

I'm going to ask my boss if I can borrow the compression gauge tomorrow and make sure it's still got good compression.

Any help please?

[Justin35ll]

4th injector was leaking. Popped the rail off and relubed the orings that seal the injectors into the manifold, the big round ones.

It stopped the leak and now it's running on all 4 cylinders, but still blowing a lot of white smoke that smells like fuel out the exhuast.

I'm just letting it idle for now outside maybe it's just burning off excess raw fuel that was being dumped in the engine before?

When I had the rail pulled out I primed the fuel pump to make sure no fuel was leaking past the injector orings cuase that could have caused the white smoke. So I'm assuming there is no more leaks and hopefully its just burning off excess fuel.

edit- yeah smoke is gone and it' runnin strong agiannnnnn
Modified by Justin35ll at 8:40 PM 5/23/2009

[snake240]

well good deal man. just so you know, the white smoke was condensation that was sucked into the cylinder from the leaky oring. black would be gas, blue is oil, and white is water and/or coolant.