Will it turn with the soleniod still on it?

 

If its not the injector , Oil or fuel . it has to be compression .. Problem is compression , is not intermittent . Give it some time to get the air out ...

 

The armature plate is under the solenoid. If the screw is loose then the poppet valve will not function correctly.

 

The only part that was intermittent was when it would drop those two cylinders. I hope that was the UVCH. The rough idle and the shutter at certain rpms has been going on for a while. I thought about compression, but it runs pretty smooth until it warms up, would lack of compression do that?

 

Bill,
Have you tried the AutoEnginuity's® Scan Tool software
in your truck?


If not it may be worth the money to pay someone to scan your engine
and get to the problem.


Russ

 

Bill you want me to mail you my compression tester? I can send it out tomorrow if you want.

 

I'm sure now that when it would have the real bad missing spells, like the other morning, it was NOT just the two injectors shutting down, it was the whole driver's side bank. I was messing with it at work this morning, and unplugging one UVCH plug wouldn't make it run as bad as it did when it would have the bad spells. Unplugging both would duplicate it exactly, so I'm assuming it was the IDM shutting down the driver's side.
I'm sorry for all the mis-information, but the more I mess with this thing, the more frustrated I get, and I start going in too many different directions. I don't have enough experience with these engines to efficiently trouble shoot this problem, so sometimes my thinking probably gets off track, and I try too many different things to try to figure it out on my own. So at this point, here is what the truck is doing.

When I start it in the morning, you can hear the miss, but it runs smoother when cold. There is a lot of bluish smoke at cold start, which seems to clear up a lot as it warms up. As the truck warms up, the miss becomes more prominent, and that's when the surge starts. The surge doesn't seem to be as bad since I changed the IPR. After it's warmed up, if I slowly bring the rpms up sitting still in nuetral, at 1000 rpms, the miss is VERY prominent, and the engine shakes. If I continue bringing the rpms up slowly, it smooths out a little, with a slight stumbling at about 1600 rpms, then another stumble at around 2200 rpms. If I quickly rev it from an idle it stumbles very bad at 2200-2300 rpms and blows out a lot of bluish smoke. If I don't rev it over 2000 rpms, it doesn't smoke near as much.
While driving the truck, I can feel it stumble the worst at around 1600 rpms. I can feel a slight stumble or sputter at around 2200-2300 rpms. Everthing I have just explained is very consistant, and has been going on for a while now. A couple weeks ago, while driving down the four lane at 60-65 mph, it started missing very bad and lost power, which I know now was the whole driver's side bank of injectors shutting down. That was the first time it had ever done that, and has done it two more times since. Once was after a buzz test, and during a cylinder contribution test, and the last time was two mornings ago will it was warming up. I have changed the UVCH on the driver's side, changed the #8 injector, because it was barely oiling yesterday, and changed the IPR last week. This morning after driving it 15 miles to work, I unplugged one UVCH plug at a time, and with each one unplugged got in the truck and revved it up to 2500 rpm, and it would blow bluish smoke no matter which one was unplugged.
I appologize for the long post, but I wanted to get as accurate info out as possible at one time, because I know I've kinda been all over the place with this since the thread started. I haven't had a chance to get it scanned again, but I'm going to try tomorrow.

 

I may take you up on that Todd. I was going to look for that post where you listed the fittings and stuff for that, but haven't yet.

 

I bought the universal diesel comp tester from harbor freight that doesn't work on our trucks for around $35. Then I got M10-1/8 Parker fitting to a 1/8" 12" grease gun whip to 1/8" to 1/8" female to female npt fitting. Let me know if that doesn't make sense. It took about a week and a half to get everything in the mail. I can send mine tomorrow if you want to save some time.

 

That makes perfect sense Todd. I'll just try to put one together, I need one anyway, but I sure do appreciate the offer.

 

Want to borrow a IDM Bill?

 

I don't remember but have you ohmed the injector solenoids ?

 

Tried the IDM from the parts truck this evening Glenn, made no difference.

I ohmed them a while back Mike, and they all ohmed out fine, but I haven't done it since this new issue. I was going to this evening, but I put the Alcoas with new tires on it, and after trying the IDM from the parts truck, with no luck, I just needed to leave it alone for the rest of the evening....know what I mean?

 

I sure do, without a thought. When I reach that 'point' I walk away before I do something stupid, LOL. Besides, alot of time I do my best mechanical work just thinking about it.

 

I think ohming the injectors is the next step.... for tomorrow. Have a good evening Bill and try again tomorrow.

I know exactly what you mean Glenn. Some times in the heat of the moment you're too close to think or see things clearly. You just need some space to get your head straight. A few steps back, and a break usually helps with that.