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Author Topic: codes i pulled for Check engine light need advice! Saleen 00-768 ¯ Member # 9379 posted                              I ran a self test with a paperclip and this is what I got: KOEO 41, 66, 91 KOER 94,94 the car is a 1990 mustang seems to runs great with no noticeable drivability issues the check engine light will appear after a while and stay on. the cel was not on during self test and car was fully warmed up. any help would be appreciated! edit: wanted to add some info, car has equal length shortys 65mm tb 73mm c&lmass air and a gt40 tubular with vacuum plugged in fuel pressure was reading @ 30-31psi still has the stock fuel pump [ 2013-06-14, 02:43 PM: Message edited by: sneakyfox90 ] -------------------- '00 Saleen SC #768 '90 GT '90 California Edition (sold) '87 Saleen #264 (sold) Posts: 1664 | From: NOR✯CAL | Registered: Aug 2009  |  : SLOWSN95 ¯ Member # 8269 posted                              41- system lean 66- MAF voltage low 91- system running lean 94- air system inoperative [ 2013-06-15, 09:41 AM: Message edited by: SLOWSN95 ] -------------------- 94' GT 347 Stroker MM Suspended 2003 SB SVT Lightning Pullied and Lowered 89'Hatch-SOLD Posts: 2214 | From: 510/east bay | Registered: Mar 2008  |  : Saleen 00-768 ¯ Member # 9379 posted                              Thanks for the reply that helps narrow it down I'm just trying to figure out why I'm getting the low voltage MAF and what's causing the problems -------------------- '00 Saleen SC #768 '90 GT '90 California Edition (sold) '87 Saleen #264 (sold) Posts: 1664 | From: NOR✯CAL | Registered: Aug 2009  |  : SLOWSN95 ¯ Member # 8269 posted                              Because you have a MAF recalibrator as opposed to an actual new MAF. Test tube is bigger therefore giving the MAF a lower voltage -------------------- 94' GT 347 Stroker MM Suspended 2003 SB SVT Lightning Pullied and Lowered 89'Hatch-SOLD Posts: 2214 | From: 510/east bay | Registered: Mar 2008  |  : Saleen 00-768 ¯ Member # 9379 posted                              so should I run the stock mass air apposed to the 19lb calibratd 73mm c&l or is there a way to run it with correct voltage? or what would be the proper thing to run? [ 2013-06-15, 06:33 PM: Message edited by: sneakyfox90 ] Posts: 1664 | From: NOR✯CAL | Registered: Aug 2009  |  : SLOWSN95 ¯ Member # 8269 posted                              I would personally not even run the c&l. -------------------- 94' GT 347 Stroker MM Suspended 2003 SB SVT Lightning Pullied and Lowered 89'Hatch-SOLD Posts: 2214 | From: 510/east bay | Registered: Mar 2008  |  :

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