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stock (allegedly) gtp with flow mods nets 10 degrees kr at wot?





i have some spare coils off of one of my old cars. ill swap em on. the coils are bright red and the wires are zzp brand. ive ziptied so many things today... and at wot about 70mph or 4500rpm in 2nd gear only it jumps to ten degrees kr *usually and stays there. this car is maddening. it seems to be a speed issue... the top of the strut mount plate on the passenger side likes to free spin on the bushing as well
 
Leiliel666 said:
i have some spare coils off of one of my old cars. ill swap em on. the coils are bright red and the wires are zzp brand. ive ziptied so many things today... and at wot about 70mph or so 4500rpm it jumps to ten degrees kr *usually and stays there. this is car is maddening
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OH GOD. You have MSD coil packs? AC Delco packs and wires go go and report back. Should work way damn better.
 
im gonna guess they aint good for our engines. its rainin pretty good here at the moment but ill put the other coils on as soon as i get a chance. ..im gonna say that the worst part of dealin with our W body cars. is tryin to diagnose a motor that countless people touched before you :th_wtf: lol
 


**improved throttle response random kr at mid throttle. and a whole gob of it at high rpm. the only pattern at all is that it seems to be biased somehow on the exhaust frequency
 
Shiet. Try the wires but after that I'm fresh out of ideas. The plugs, switch em if you havent already...the injectors maybe? Check if they're effd? I have no idea.
 
i just pulled plugs off the front of the motor to check the scoring. the number one had oil on it. valve seals? yeah i hear ya man. im half tempted to write it off as a basket case. i got another car to drive till winter. maybe i can throw it at a shop until they figure it out XD
 
Leiliel666 said:
i just pulled plugs off the front of the motor to check the scoring. the number one had oil on it. valve seals? yeah i hear ya man. im half tempted to write it off as a basket case. i got another car to drive till winter. maybe i can throw it at a shop until they figure it out XD
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Well there's something! Switch em with 606s or Ngk tr-55. Post back with results. If she's breathing clear then the issue to be resolved is with what were discussing I'd say.
 


...newish downpipe but stock design. and the inner wall appears to be collapsing. i put the 605 plugs in and nothin changed much. would the exhaust rattle cause crazy knock? especially at higher rpm?

my bad 606 plugs. i got the autolites
 
It's got nothing to do with your ignition.

Check your DP for clogs, but it sure sounds to me like a trashed suspension. I had a problem with an axle causing KR at certain speeds due to it's harmonics.

I never changed away from the factory knock module on the 97 that I used to have, but I was pretty sure it was the LT4 knock module that everyone swapped in.

But, if you are going to swap this motor into a lighter car, I would recommend that you get a 98+ wiring harness and PCM. Some 97's just have bad luck with kr.
 
GTPpower said:
It's got nothing to do with your ignition.

Check your DP for clogs, but it sure sounds to me like a trashed suspension. I had a problem with an axle causing KR at certain speeds due to it's harmonics.

I never changed away from the factory knock module on the 97 that I used to have, but I was pretty sure it was the LT4 knock module that everyone swapped in.

But, if you are going to swap this motor into a lighter car, I would recommend that you get a 98+ wiring harness and PCM. Some 97's just have bad luck with kr.
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LT4 module?
 
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