Oh and that second line is supposed to say I just gave it a shot, lol. Guess the spellcheck got me. Confused myself when I reread it.
Oh and that second line is supposed to say I just gave it a shot, lol. Guess the spellcheck got me. Confused myself when I reread it.
by true duals, you must mean no H or X pipe?
I can see where around 2000 rpm that may cause a bit of resonance and knock, especially if it has flowdisasters on it. Loose Tq converter bolt can cause knock also, as can excess carbon buildup in the combustion chamber. Have you ever seafoamed it?
94 Blazer, Turbo'd 350 TBI - DD
1991 2500 Suburban Adventure truck - 4wd conversion, 4-link F/R, 582ci CNP Big Block with Terminator X EFI backed by a 6L90 and twin stick'd NP205 t-case
2012 Porsche Panamera Turbo - Date night car :)
1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac
Yes it has true duals manifold back with some kind of loud muffler. I think that's possibly part of it but that was on there when I bought the truck bout 6 months ago. I hate the exhaust issue, lol. I just ordered a new y piece and am going to run it right next week as soon as that comes in with a new o2 sensor. I did have the intake manifold off the weekend I bought it as it had an intake manifold leak so I got that sealed up and I did notice the heads seemed to have a fair amount of build up so I imagine the combustion chambers do as well. I have never sea foamed it but that might be a good idea. I did clean all of the carbon out of the intake and plugged egr and deleted in computer.
I also did tune up a while back and while changing spark plugs I only managed to change 7 out of 8. The number 7 plug would only turn about 1/4 turn and could not get it to come on out. I was guessing excess carbon buildup on inside of spark plug at threads but I turned it enough I was getting scared of breaking it off in cylinder so until I get around to rebuilding the engine hopefully this summer it is stuck there I guess. It is my daily driver so I figured it better that way for now.
ahhhhhh, now we're getting somewhere. I'd seafoam that bitch a couple times, suck the whole can up into the manifold with one of the vacuum ports on the front of the TB, let it sit 15-30 minutes, then take it for a spin and hope no one calls the fire department on you. LOL. If it's bad (sounds like it is) might be a good idea to do it again. You MUST change the oil after you finish the seafoam process though, so I always have the oil change stuff on hand when I do it.
94 Blazer, Turbo'd 350 TBI - DD
1991 2500 Suburban Adventure truck - 4wd conversion, 4-link F/R, 582ci CNP Big Block with Terminator X EFI backed by a 6L90 and twin stick'd NP205 t-case
2012 Porsche Panamera Turbo - Date night car :)
1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac
Sounds like a plan!! I'll get to it this weekend while I'm off work for once, lol. I should know if someone calls 911 though lol I'm the volunteer fire chief in the town where I live so it should be interesting. Hopefully between that and the new exhaust next week this thing will be back in order till I get a new trans built for her
This is after 80 thousand in my 4.8 powered GMC. (look in the rearview) https://www.facebook.com/video.php?v...24329774467090
I did my old TBI 350 silverado with 250k on it and had the fire department called on me. It was hilarious.
94 Blazer, Turbo'd 350 TBI - DD
1991 2500 Suburban Adventure truck - 4wd conversion, 4-link F/R, 582ci CNP Big Block with Terminator X EFI backed by a 6L90 and twin stick'd NP205 t-case
2012 Porsche Panamera Turbo - Date night car :)
1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac
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