IronIndian
Well-Known Member
- Joined
- December 24, 2001
- Messages
- 120
- Reaction score
- 0
- City, State
- Glendale, CA
- Year, Model & Trim Level
- 1991 Mazda Navajo
The usual surging/hesitation- got codes!
Hello all,
I have a 91 Navajo 4.0L that has just started giving me problems this past week. I replaced the Fuel Pump Relay because the pump would not shut off after the truck was turned off. You'd literally have to smack the power distribution box to make it stop . Just recently the "Check Engine" light would come off and on-usually at idle, but also when the engine would hesitate/surge on acceleration. Does this sound like a dirty MAF sensor to you? I have a cheapy Actron code reader in front of me and tried the KOEO test and it gave me codes that befuddled me Should I be receiving 2 or 3 digit codes on the reader? The first code was a 11 and the second code was a 66. The book it came with tells me that "after all codes are sent, the whole group is sent again just one more time (so you can double check your code list)." I assume that the 91 4.0L uses the MCU (Microprocessor Control Unit) and not the EEC-IV correct? Thanks all!!!!
P.S. I'm going out right now to try and get some KOER codes.
Hello all,
I have a 91 Navajo 4.0L that has just started giving me problems this past week. I replaced the Fuel Pump Relay because the pump would not shut off after the truck was turned off. You'd literally have to smack the power distribution box to make it stop . Just recently the "Check Engine" light would come off and on-usually at idle, but also when the engine would hesitate/surge on acceleration. Does this sound like a dirty MAF sensor to you? I have a cheapy Actron code reader in front of me and tried the KOEO test and it gave me codes that befuddled me Should I be receiving 2 or 3 digit codes on the reader? The first code was a 11 and the second code was a 66. The book it came with tells me that "after all codes are sent, the whole group is sent again just one more time (so you can double check your code list)." I assume that the 91 4.0L uses the MCU (Microprocessor Control Unit) and not the EEC-IV correct? Thanks all!!!!
P.S. I'm going out right now to try and get some KOER codes.