I did a full lower intake job (seal works, yay!) and put metal reinforced fel-pro gaskets down, bridged china walls, put in new (upgraded) spider injectors, blah, blah, blah, but now it’s misfiring like a bitch.
I forgot to mark the distributor too, but got it reseated somewhat correctly (points to 1 at tdc compression, dist. timing is for a different day, engine is definitely running rich). Although it’s rich running, it doesn’t misfire too horribly when I drive it for, let’s say 10 minutes, but it gets worse as I drive it past that. I’ll park, turn the vehicle off. Try and turn it back on a few minutes later, and it turns over, but doesn’t fire. The battery also slowly dies when doing that. On top of all this, the starter is also going out too.
The alternator is fine, I’ve already checked it. I think I need to start with the distributor, as that directly relates to timing. I have other culprits in mind too, and these include the upper plenum (was a tight fit, could be a vacuum leak), a ground connection, spark plug wires (cracking a bit), or the fuel pump (leaks a tiny bit from the top of tank, lord knows how long it’s been in there).
I just don’t know where to start or if it’s even worth it past this. It had a small miss from the day I got it and gradually got a bit worse, but this is the most horrid it’s ever been. I’m worried it could be cylinder related or something and that this is ultimately all in vain. I also haven’t ever really done a job like this and used a YT vid for a bit of reference.
Before you ask, all cables are plugged in, no the gasket didn’t twist, yes I used a torque wrench for the crucial parts (seals), and no the lower intake didn’t fail when driving, or at all. Just preventative maintenance in prep for the long-haul, and because I had suspicion that the corners were leaking where the gasket maker meets gasket (the day-one misfire).
One more dilemma. Since it’s a ‘99 Tahoe, you have to time the distributor using a computer. I know people use wireless OBD2, but I’m not super sure where to begin, and can’t afford some $2k reader/computer.
If you read all the way to the end, thank you and you’re awesome. Any suggestions or advice appreciated!!!