turbotaone
New Member
- Joined
- Jan 22, 2003
- Messages
- 440
I have just pinned down the problem that I've been
chasing for the last six months. It's false knock !
Evertime I would nail the throttle the car would fall
on it's face (hesitate,stumble,backfire,etc.) and my
scanmaster would show 39 degrees of retard. If I
exelerated at a normal pace the car ran ok, it only
acted up when I would try to floor it. The fuel pressure
was 65lbs.at WOT and the 02's were in the high 700's.
So I figured the knock had to be false. I talked to a GN
mechanic and he told me to temperarely unplug my knock
sensor and see how the car ran, So I did this and the car
ran great. I put a new knock sensor in and torqued it to
the factory specs. just to make sure that wasn't the problem.
The car did the same thing with the new sensor plugged in.
I checked to make sure my down pipe wasn't hitting anywhere
and it's not, I have the poly motor mounts so I no the engine
isn't jumping around. The GN mechanic told me that I probally
have an older chip without a knock delay in it. He told me to
try a new chip with a 4 second knock delay. The chip I have now
is a Reds 93 that is at least 10 years old. I would like to know if
you guys run chips with a knock delay and do you think this is
what I need to get rid of my false knock ? My car is a TTA if that
makes any difference.
Thanks James
chasing for the last six months. It's false knock !
Evertime I would nail the throttle the car would fall
on it's face (hesitate,stumble,backfire,etc.) and my
scanmaster would show 39 degrees of retard. If I
exelerated at a normal pace the car ran ok, it only
acted up when I would try to floor it. The fuel pressure
was 65lbs.at WOT and the 02's were in the high 700's.
So I figured the knock had to be false. I talked to a GN
mechanic and he told me to temperarely unplug my knock
sensor and see how the car ran, So I did this and the car
ran great. I put a new knock sensor in and torqued it to
the factory specs. just to make sure that wasn't the problem.
The car did the same thing with the new sensor plugged in.
I checked to make sure my down pipe wasn't hitting anywhere
and it's not, I have the poly motor mounts so I no the engine
isn't jumping around. The GN mechanic told me that I probally
have an older chip without a knock delay in it. He told me to
try a new chip with a 4 second knock delay. The chip I have now
is a Reds 93 that is at least 10 years old. I would like to know if
you guys run chips with a knock delay and do you think this is
what I need to get rid of my false knock ? My car is a TTA if that
makes any difference.
Thanks James