Fuel Injectors

[project 92z]

Turns out it wasn't coolant in the plenum mixed with unburnt gas fumes, it was gas. I called in the calvary and he came over and took about 10 minutes to figure out that my pressure regulator had took a crap and that the diaphragm was allowing gas to feed thru my vacuum lines. So a week later and truly about $70 bucks later, I'm back on the road!!!!!!

[project 92z]

just started on the job. And by the way so far there's no cost to me- thank goodness for life long warrantees. Anyway plenum is full of water. I'm not understanding that one at all. I didn't do anything the first time to damage the throttle body and All gaskets seem to be in tack.

[project 92z]

Oil on the spark plugs? Could just as easily be the cam carrier gasket as the valve cover gasket.

Wait a minute, On the DOHC (3.4) aren't the cam carrier gasket and the valve cover gasket the same thing? CHILTON'S thinks so...Or do you mean the underneath the cam carrier?
And btw I got those injectors and they are neither remaned or for a 3.4. They have the same nozzle as what I had with 4 spray holes

[Schurkey]

Thanks for all the info. I Just added that cable onto my wish list. I gotta get my baby up and going though(my project is also my daily driver). I'm gonna try to just replace the injectors. I'm also gonna replace the plenum gasket set and the valve cover gasket set AGAIN. When starting the compression test, I noticed that my spark plugs were soaked in oil.

Any suggestions on the valve cover gasket, in particular, the grommets around the spark plug hole. I just did both of these jobs originally back in JUly. This many issues ... Should I be using a gasket sealer in addition to the fel-pro set?

Perform diagnosis BEFORE throwing parts under the hood.

Oil on the spark plugs? Could just as easily be the cam carrier gasket as the valve cover gasket.

[project 92z]

Thanks for all the info. I Just added that cable onto my wish list. I gotta get my baby up and going though(my project is also my daily driver). I'm gonna try to just replace the injectors. I'm also gonna replace the plenum gasket set and the valve cover gasket set AGAIN. When starting the compression test, I noticed that my spark plugs were soaked in oil.

Any suggestions on the valve cover gasket, in particular, the grommets around the spark plug hole. I just did both of these jobs originally back in JUly. This many issues ... Should I be using a gasket sealer in addition to the fel-pro set?

[Schurkey]

Did a quick overview of the page- where do I get a cable? Does WOT Tech sell them?

http://www.aldlcable.com/

^^^

[project 92z]

Did a quick overview of the page- where do I get a cable? Does WOT Tech sell them?

[pocket-rocket]

Do you have a laptop with a decent battery?

http://www.aldlcable.com/

Sent from my HTC One X using Tapatalk now Free

[project 92z]

Having some limited resources, a REAL scan tool isn't available to me but compression tester- got it. I gotta work today but I'll be on it when I get home tonight. Hell, can't sleep anyway when my baby's sick. LOL
a bit off topic but have you seen the insurance commercial with the guy and the giant baby, that's supposed to be his car. www.youtube.com/watch?v=ryNtVK55OUY

[Schurkey]

I guess I should have been more specific. I meant blown head gasket....

A compression test and leakdown test will tell that tale.

And being a 92 with OB1, I'm not sure how much good a scan tool would be...

OBD I provides a considerable amount of data through the ALDL. A REAL scan tool will be invaluable. A cheap-junk piece of dreck consumer-grade scan tool will be worthless.

[project 92z]

I guess I should have been more specific. I meant blown head gasket.... And being a 92 with OB1, I'm not sure how much good a scan tool would be...

[Schurkey]

I might have a blown head.

Define "blown head". Burnt valves? Bent valves? Cracked?

The car hasn't overheated so I don't know why it would be Ran ok til I gave it some gas, then it began to sputter again and there was a bit of white smoke. Not a lot but a bit. Could a blown head cause the sputtering?

Anything is possible.

Could it cause the dummy light to come on. Maybe if a gasket didn't seal properly... I don't know why but this goes back to the o-ring issue a few weeks ago. That's when my headaches began. I had changed Plenum, the 2 intake gaskets, the egr and the o-ring( the fel-pro kit)

First Guess: You've not found the real cause of the problem yet; and on any vehicle as old as these, you can expect that sometimes there are several things wrong that may be interrelated.

"I" would be all over that computer with a scan tool. I'd be looking at fueling, O2 reading including cross-counts, knock sensor readings; and while you're in there, check the fuel pressure.

[project 92z]

Just tried it again. I might have a blown head.The car hasn't overheated so I don't know why it would be Ran ok til I gave it some gas, then it began to sputter again and there was a bit of white smoke. Not a lot but a bit. Could a blown head cause the sputtering? Could it cause the dummy light to come on. Maybe if a gasket didn't seal properly... I don't know why but this goes back to the o-ring issue a few weeks ago. That's when my headaches began. I had changed Plenum, the 2 intake gaskets, the egr and the o-ring( the fel-pro kit)

[pocket-rocket]

If it's this listing:

http://www.ebay.com/itm/SET-OF-6-FJ102-Fuel-Injectors-6CYL-3-4L-CHEVROLET-PONTIAC-91-93-LUMINA-GRANDPRIX-/121171478996?pt=Motors_Car_Truck_Parts_Accessories&hash=item1c366209d4&vxp=mtr

Then yes, those are meant for the DOHC, and actually I would think that $67 (free shipping even) is a pretty good deal on 6 reman'd injectors.

One thing that works against you on injectors that have sat for a long time is the fuel can gum them up and cause them to not open or cause them to partially clog making them so they don't inject the right amount of fuel for a given injector pulse. I believe that injectors that are rebuilt or cleaned professionally usually have a lubricant injected into them to prevent them from sticking where they don't open when commanded on, something the junkyard doesn't do.

[project 92z]

OK that means it's time for some exploratory surgery. I was hoping that there was some obvious direction that I hadn't thought of. But as for the injectors, This is the second set were the housing has begun to split along the seam. I can't remember if they were from the jy or if they came outta a 3.4 or 3.1. I just saw a set on ebay I 'm gonna grab. They're listed as FJ102. If that's right, are those the right ones?