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HELP! runs like crap after HKS 264/264 install

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laza101

15+ Year Contributor
63
0
Jul 22, 2003
NA,
Having a problem with my car. THE TIMING IS SET PERFECTLY, THE CAMS ARE ALIGNED. Something else happened during the cam install and I didn't hit any valves.

1) My car is runnin rich
2) My car bucks/misses at low rpm while cruising with no throttle being applied
3) At WOT the car runs great... no bucking is present
4) My plugs and o2 sensor are fine except for #2 spark plug which was fouled (!?!?) - black compared to other plugs. I tried another plug wire but it didn't help. Replaced the plug and the problem is still there.
5) My idle is very irratic.... it will idle fine for 30 sec to 1 min then start flapping around. example: 800-900, 900-600, 600-1000 and eventually almost stall out...missing/surging
6) I adjusted my biss screw and that helped the idle a bit but ony for a short time. it soon went back to its old way..
7) Playing with timing and/or fuel pressure has very little effect.
8) Compression in all cylinders is 145 to 155 psi.

Any ideas?
 
Try Spark plug wires. I had a weird situation with my cams too.. But it was because DSMlink rest on me. Also I get weird problems.. every time did a turbo swap my Spark plug wires would Arc gap on me. :rolleyes: So I would go do a pull and get some weird hessitation.
 
I know this is going to sound really really silly, BUT check to see if the cams are installed properly. They may be 180 degrees turned. This will give you the right base timing if I recall correctly.

The exact same thing happened with a fellow supra owner and his HKS 264s.

Sounds silly, but its a good chance. Worth a shot.
 
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