This is topic codes i pulled for Check engine light need advice! in forum Tech Talk at Northern California Ford Owners  .


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Posted by sneakyfox90 (Member # 9379) on :
 
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! [patriot]

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 ]
 
Posted by SLOWSN95 (Member # 8269) on :
 
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 ]
 
Posted by sneakyfox90 (Member # 9379) on :
 
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
 
Posted by SLOWSN95 (Member # 8269) on :
 
Because you have a MAF recalibrator as opposed to an actual new MAF. Test tube is bigger therefore giving the MAF a lower voltage
 
Posted by sneakyfox90 (Member # 9379) on :
 
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 ]
 
Posted by SLOWSN95 (Member # 8269) on :
 
I would personally not even run the c&l.
 




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