Hi, I am the owner of an '86 GN that I have had since '88. It has pretty
much been in storage with limited miles put on it for the last 15 years.
I have tried to keep up with oil changes and added sta-bil to the fuel to
try and prevent any bad issues from the storage. My problem is that when
I do take it out and get into boost the knock box lights up like a christmas
tree at only about 10 psi. If I roll into the throttle and let the boost build
slowly it is not as bad but will still knock. The plugs are fresh. Where is a
good place to start with the diagnosis? I am using an OTC 400oE scan tool.
This was a strong running car back in the early 90's and the combo is the same
so I am guessing it is just something worn or out of spec causing this.
Here is brief description of the car.
1986 GN
55,000 mi.
stock long block
te34 turbo
stock down pipe
true dual exhaust
stock intercooler
hot wired/upgraded fuel pump
green stripe injectors
"street" chip of unknown origin
Thanks
much been in storage with limited miles put on it for the last 15 years.
I have tried to keep up with oil changes and added sta-bil to the fuel to
try and prevent any bad issues from the storage. My problem is that when
I do take it out and get into boost the knock box lights up like a christmas
tree at only about 10 psi. If I roll into the throttle and let the boost build
slowly it is not as bad but will still knock. The plugs are fresh. Where is a
good place to start with the diagnosis? I am using an OTC 400oE scan tool.
This was a strong running car back in the early 90's and the combo is the same
so I am guessing it is just something worn or out of spec causing this.
Here is brief description of the car.
1986 GN
55,000 mi.
stock long block
te34 turbo
stock down pipe
true dual exhaust
stock intercooler
hot wired/upgraded fuel pump
green stripe injectors
"street" chip of unknown origin
Thanks