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View Full Version : code 45 system too lean/rich

vtecmansi
09-06-2002, 01:03 PM
hey all. i got a code 45 on my civic si twice now. its a system too lean/rich prob. i have an aem fuel pressure reg. could running too much fuel pressure make it run too rich??? i have it set at 48-50 psi. is that too much with an intake, intake manifold, header, and exhaust?!?! if anybody has had this prob please gimmeee some info.
VieT916
09-06-2002, 11:16 PM
Originally posted by vtecmansi
hey all. i got a code 45 on my civic si twice now. its a system too lean/rich prob. i have an aem fuel pressure reg. could running too much fuel pressure make it run too rich??? i have it set at 48-50 psi. is that too much with an intake, intake manifold, header, and exhaust?!?! if anybody has had this prob please gimmeee some info.

Get rid of the AEM FPR, and reinstall your stock one. Those mods aren't enough to need to change your fuel settings. You're ECU will compensate for it.
Racing Rice
09-09-2002, 01:04 PM
Originally posted by VieT916


Get rid of the AEM FPR, and reinstall your stock one. Those mods aren't enough to need to change your fuel settings. You're ECU will compensate for it.

What he said.. Or buy a turbo or Supercharger and keep the FPR;)