Hello to All,
I'm in the process of getting my 1988 ST-165 ready for sale. It was recently serviced with top head work including a Cometic head gasket and full head rebuild to stock specs. Full compression leak down with no issues.
The car is all stock except for stock rebuild (Majestic Turbo, TX) and a new manifold (header) and downpipe - No TVIS or smog left on engine. HKS exhaust and adjustable timing gears and Magnecor plug wires.
Here's the problem:
When it ran before, no issue making full boost (the boost gauge needle would peg) and you knew it.
Now, no matter what gear, it won't go past 2/3 -3/4 on the gauge and you know it - Slow!
The repair shop said vacuum leaks, I sealed any and all - this place is 2 hrs away from me so I can;t just go there and wait, (long story)
So, they said block the wastegate lines and see if is makes full boost, which I did and it does (pegs the needle) and slams shut.
I asked what the engine timing was set to and was told zero on the exhaust, 1 degree negative on the intake.
My first thing I want to do is take the timing gear cover off and start changing the engine timing. Been there,done that, and I'll do it again. The car runs fine, just flat.
Any help would be greatly appreciated.
One last thing - I can't find anything about the plastic knob located on the firewall centered behind the intake that has the vacumn lines running from the turbo to the intake manifold - Is this a boost adjustment?
Thanks.
I'm in the process of getting my 1988 ST-165 ready for sale. It was recently serviced with top head work including a Cometic head gasket and full head rebuild to stock specs. Full compression leak down with no issues.
The car is all stock except for stock rebuild (Majestic Turbo, TX) and a new manifold (header) and downpipe - No TVIS or smog left on engine. HKS exhaust and adjustable timing gears and Magnecor plug wires.
Here's the problem:
When it ran before, no issue making full boost (the boost gauge needle would peg) and you knew it.
Now, no matter what gear, it won't go past 2/3 -3/4 on the gauge and you know it - Slow!
The repair shop said vacuum leaks, I sealed any and all - this place is 2 hrs away from me so I can;t just go there and wait, (long story)
So, they said block the wastegate lines and see if is makes full boost, which I did and it does (pegs the needle) and slams shut.
I asked what the engine timing was set to and was told zero on the exhaust, 1 degree negative on the intake.
My first thing I want to do is take the timing gear cover off and start changing the engine timing. Been there,done that, and I'll do it again. The car runs fine, just flat.
Any help would be greatly appreciated.
One last thing - I can't find anything about the plastic knob located on the firewall centered behind the intake that has the vacumn lines running from the turbo to the intake manifold - Is this a boost adjustment?
Thanks.