I have been having a tick on cold starts, then a couple weeks ago I had a miss for about 30 seconds. Yesterday I started her up in the morning, and before I cranked I turned the mirror down so I could see the exhaust. It didn't catch the first key hit so I hit it a second time and she fired up and a puff of white smoke comes out, then none then another puff. I let it idle for a minute and rev the engine a little and it gives a little black smoke puff, I repeated it several times same result. Today I fired her up in the morning and same thing only it fired on the first try today, but still a little puff of white smoke, then a little black smoke when I revved it. After a 35 mile trip on the interstate I got to my customer and parked, when I revved it I still get a little puff of balck smoke. I'm not revving it alot just a little bump of the pedal. My oil is not over full, but it is to the full line. My air filter was replaced last Firday and the minder is not pulled down yet so I am OK with air supply. The only other thing is my mileage is off ever so slightly and power for hard acceleration seems off too. Thoughts???

Sorry about the long post.

 

Definately is sounding that way. at least its under warrenty.

 

Yes but... They don't seem to want to do anything until it quits completely. If what I'm thinking is right, I'm gonna burn a hole in a piston before they fix it. Is there a shade tree way to detect which injector it is and maybe light a fire under my dealer?

 

Yes, but it involve pulling the valve cover or pins out of the pass through connector (drew can probably help here, I've never worked your engine before). Pretty much you just disconnect an injector at a time and see which one stops the smoke. Or you can pull the exhaust manifold and see which hole smoke is comming out. Sometime you can get a clue to what cylinder it is by using a temp gun on the exhaust manifold. Measure the temps at each cylinder when you first fire it up (before everything get really hot) the missfiring cylinder would be the cold one.

 

If it's smoking it's getting too much fuel right? If that be the case wouldn't it heat up faster?

 

It's smoking because it's not atomizing the fuel correctly. The mix is off which causes a colder burn. Also the unburnt fuel cools down the manifold. Usually an injector sticking is the cause of overfueling and that would smoke so bad your neighborhood would be in a haze.

 

Thanks Jake, I'll round up a temp gun and see what I can find. Do you think a contribution test would find it at this stage? I think I can get the dealer to do that for me with their scan tool.

 

They should be able to, If they do run the test, ask them for a print out of the results (you want the data, not if it was a pass or fail) Your looking at two things, fuel rate and engine load. When the bad cylinder is cut out, the engine load and fuel rate will drop.

 

Thanks Jake, that's some good info. I will see if I can get the data. If I do I'll post it up here. Thanks again.

 

temp gun $50 at home depot or sears...


if your thermo gun shows this.........




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run very far away!!!!