85 GT Struggling for/Losing Power or Throttle not engaging? (Page 3/3)
CZSeventyFive JUL 15, 06:34 PM
Ended up with a set of Reman Rochester injectors for GM 2.8L engines, they appeared nearly identical to the stock ones I pulled out. As mentioned the old.ones weren't terrible, no notable leaking, though some had some corrosion on the end that was inside the rail. I cleaned up around the injector holes scrubbed, yadda yadda, followed the Chilton's book about living the tips with trans fluid, and ultimately I ended up is the injectors not really wanting to seat completely in the holes. Notably, I pushed one side in first, which seated, but then had to push down on the other side to get the injectors to line with the holes and go in. But now there's a bit of a gap on all of them, and.im just curious as to whether there's a bit of a trick to getting them in or if it's just a matter of working the injectors a little, twisting back and forth on the rail, and careful pushing till they go in.

Edit: Only after I post questions do I actually go into further research. A quirk I guess. Found another thread suggesting that maybe I just need to lube or grease them more so there's less resistance sliding into the holes. I guess that makes sense for most holes.

Edit 2: Eh, that didn't really seem to help. I noticed pulling the rings, but that's no good either. It's like I can seat one side, but not the other. Same size injectors. No idea. Stumped. Try again tomorrow. Have a picture of the gaps, but mobile doesn't seem to allow image uploads.

[This message has been edited by CZSeventyFive (edited 07-15-2022).]

CZSeventyFive JUL 16, 10:00 PM
And as this sage continues with further thread bumps:

I decided in a fairly irritated manner to just put everything together and see what happens even if the injectors aren't seated as much as I would like them to be. Namely, check for leaks.

Rather than the injectors leaking (from what I could tell anyways), the bottom of the EGR tube (where it connects with the EGR valve base) seemed to simply become, errr, moist (First Picture). After about a minute of the engine running the moisture would begin to steam as the components heated up. I was expecting to see leaking from the injectors, or fuel rail, or anywhere else really. Instead I had whatever this was. That's a new (er) gasket on the base of the tube, and there's some seeping underneath the valve's base (Second Picture). The part of the tube that connects to the upper plenum seems a but moist too. Checking the moisture, none of it smells like fuel, or, anything really. The gasket between the plenum and tube has never been removed as it seemed fine. Does fuel potentially leak there? I used a little degreaser for scrubbing the valve, and I tried to wipe it off before starting. Maybe this is just some residual heating up and burning off? I'm worried it may start a fire if I just ignore it. Worst case, I guess, is maybe the tube cracked?





Edit: Might have just been soot or dust burning off after sitting so long. I ran it again and left it (poured a little water on it to see if it'd steam), and then it just kinda stopped steaming after a bit. No peculiar smells, no fuel smells, oil, no real burning smells outside the usual smell of heat (or whatever you'd call that). Still blocked in the garage by a giant safe on a nearly crushed pallet, but I can probably move it later. Checked the pressure again in a really brief test and it read about 35-36 at idle, but dropped immediately after turning the car off. Granted, it ran for maybe ten seconds as I was in a hurry. Either I was doing it wrong or I needed to let it sit longer or rev it, though I'm not certain it should matter how long the car is on for pressure to hold, no?

[This message has been edited by CZSeventyFive (edited 07-17-2022).]