When I hit the gas and the turbo starts spooling I get audible knock and then up to 6 degrees of knock retard on the scanmaster, then it tapers off and goes away at WOT.
It's an 87 GN, stock motor
91 octane, 12 psi of boost (until i get this figured out)
Turbotweak chip for 91 octane
Dutt neck stock IC
Stock Turbo
RJC power plate
new plugs/wires
AFPR set at 43psi line off, walbro 340 fuel pump, new fuel filter. fuel pressure around 55psi at full boost..
It's a more recent problem, not sure what could have gone wrong.
TPS is .44 at idle, was only 4.3x at WOT, so I adjusted it, now shows 4.70 at WOT and .44 at idle.
IAC is good,
o2 sensor is a denso, also good.
o2 volts are low 800s at WOT
BLMS check out ok last time I checked..
I'm not sure what else to check.. It smells a little rich at idle still.. It's really starting to get annoying.
It's an 87 GN, stock motor
91 octane, 12 psi of boost (until i get this figured out)
Turbotweak chip for 91 octane
Dutt neck stock IC
Stock Turbo
RJC power plate
new plugs/wires
AFPR set at 43psi line off, walbro 340 fuel pump, new fuel filter. fuel pressure around 55psi at full boost..
It's a more recent problem, not sure what could have gone wrong.
TPS is .44 at idle, was only 4.3x at WOT, so I adjusted it, now shows 4.70 at WOT and .44 at idle.
IAC is good,
o2 sensor is a denso, also good.
o2 volts are low 800s at WOT
BLMS check out ok last time I checked..
I'm not sure what else to check.. It smells a little rich at idle still.. It's really starting to get annoying.