Pity7700 Build thread, why not? pic heavy!

Old fuel pump? What's the fuel pressure at the rails?

 

haven't checked fuel pressure. going to check resistance on all injectors and check all the COPs hopefully tomorrow.

 

Gotta be a cop or fuel pressure issue

 

ill start checking everything tomorrow if I can.

I got off work at 3:30 this morning. had the chance to work till 5:30, I would have but I had tennis shoes on outside in the snow storm lol.

will be working 12 tonight if I can.

 

Put a bottle of ISO-HEET in the gas tank to see if this will make a difference. Also started pulling COP connectors while it was missing, they all made the misfire worse so i don't think it's a cop. Plugs are brand new with the exception if #8.

After letting the truck run for about 15 minutes with that HEET in the tank and after me messing with the COP connectors the idle leveled out. I don't know if a connector was sliding off or if the HEET made some sort of improvement. I still have a stumble when I give it has but the idle is great, y'all might be able to hear it in the sound clip. Won't have time to really get at it till this weekend.

 

My money is on #8 plug

 

I would probably have to re-drill & tap the head too!

fortunately, I just got 3 codes on the way home from work.

P0300: Random Misfire
P0305: Cylinder 5 Misfire
P0316: Misfire detected on start up.

I noticed the misfire is worse under load. COP on 5 could be bad. I pulled the damn plug the other day, I just put those in last week. I checked the gap and cleaned it off with a towel, it had some coolant and **** stuck on it.

might have to check compression.

 

New coil on #5, problem solved!

coolant must have fried the coil.

 

Found the clunk!

When I replaced my transmission crossmember last year I replaced the mount/shock absorber that goes between the crossmember and the trans, that mount/absorber broke. All of the rubber pulled apart and actually swelled. Got the new part and reinstalled. Fixed the issue.

 

Wouldn't think it was something recently replaced.
Good deal, ya found it.