really rich at 8 psi

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montego6500

New Member
Apr 25, 2007
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Burlington, Wisconsin, United States
ok so i just rebiult motor. cometic mhg, arps, ross pistons, 550's, lex, afpr, walbro, evc6, egt & fuel pressure gauge, afr gauge, kkk k27 upgraded turbo, tubular manifold, and 3 icnh exhaust turbo back.


now the problem is when i boost past 8 psi the car just goes super rich like 9.1 or less and it falls on its face. i cant figure out why. any one have any ideas please chime in. oh and no codes.

thanks dan
 
F

figgie

Supramania Contributor
Mar 30, 2005
5,225
16
38
50
Twin Cities, Minnesot-ah
montego6500;1103128 said:
ok so i just rebiult motor. cometic mhg, arps, ross pistons, 550's, lex, afpr, walbro, evc6, egt & fuel pressure gauge, afr gauge, kkk k27 upgraded turbo, tubular manifold, and 3 icnh exhaust turbo back.


now the problem is when i boost past 8 psi the car just goes super rich like 9.1 or less and it falls on its face. i cant figure out why. any one have any ideas please chime in. oh and no codes.

thanks dan
Click to expand...

I don't see an S-AFC or any other piggy back. Stock the car always runs very rich under boost. AFR's numbers lower than 10. 9.1? I doubt you are reading that as most Widebands do not go that low accurately.
 
F

figgie

Supramania Contributor
Mar 30, 2005
5,225
16
38
50
Twin Cities, Minnesot-ah
montego6500;1110981 said:
ok so i changed all of the couplers and clamps and still rich as hell and figgie the my xd16 reads down to 8.1 sorry if you dont agree but thats what it reads to. i am trying to tune it out but its not seeming to help
Click to expand...


how exactly are you tuning? I don't see a piggy back of any sort (still). You are not going to clean that up by screw alone.
 
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