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2500 rev limit

KYR32GTR
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KYR32GTR Apprentice

KYR32GTR

Posted
Posted

Hello all,

 

My 89 GTR has a random issue that I can not figure out.

Cleaned the AFMs, new coil harness and coils, spark plugs, all connections secure and tight, no check engine light or ECU codes.

 

the car will be running perfectly, then randomly it will hit what I have found to be a common AFM issue. the car will have a 2500rpm rev limit, might stall, bucks/backfires etc when trying to keep it going. can drive it for a minute or more and then its back to normal. the entire time no engine lights or ecu codes. I just redid the internal AFM solder connections, but all seemed very tight and secure.

 

is there anything else I need to check? 

im ready to but new AFMS if the solder doesnt work but I would like to find a specific list of things to check or replace instead of just guessing.

 

thanks in advance

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Robocop2310 Experienced

Robocop2310

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Posted

Hey mate. Do you have an aftermarket blow off valve installed? If so, it may cause reving and stalling issues on some cars. 

Try going with a plumb back setup and upgrade to Z32 AFM if you can.

I had a similar issue fixed with above.

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