Hello all,
I am being plagued with reoccurring slow starting. initially i assumed it was the fuel pump per the many threads on the topic and since the bosch unit for my 2004 (67726) isnt available, i predicted having to go with store brand pumps so i installed the Genright access panel so wouldnt have to drop the tank frequently when they undoubtably die. heres where it gets weird. i didnt have the new pump on hand so i put the tank back in and magically no more slow starts. this lasted for a few weeks then started up again so i pulled the assembly out and replaced just the fuel pump itself with the bosch one which is still available. again i got a few weeks of the jeep firing right up and now its slow starting again. i guess its possible the check valve in the brand new fuel pump died but im kinda thinking that isnt the case. any suggestions of what to investigate?
I plugged a scanner in to measure fuel trim and o2 sensor readings for the heck of it and long term at both banks at temp is 32% im going to have somewhere verify that because that seems unrealistic without throwing a code. my o2 sensors are reading like i may have a bad one so ill probably replace those. from my understanding a bad 02 wont cause slow starting so im at a loss of where to begin.
cheers
I am being plagued with reoccurring slow starting. initially i assumed it was the fuel pump per the many threads on the topic and since the bosch unit for my 2004 (67726) isnt available, i predicted having to go with store brand pumps so i installed the Genright access panel so wouldnt have to drop the tank frequently when they undoubtably die. heres where it gets weird. i didnt have the new pump on hand so i put the tank back in and magically no more slow starts. this lasted for a few weeks then started up again so i pulled the assembly out and replaced just the fuel pump itself with the bosch one which is still available. again i got a few weeks of the jeep firing right up and now its slow starting again. i guess its possible the check valve in the brand new fuel pump died but im kinda thinking that isnt the case. any suggestions of what to investigate?
I plugged a scanner in to measure fuel trim and o2 sensor readings for the heck of it and long term at both banks at temp is 32% im going to have somewhere verify that because that seems unrealistic without throwing a code. my o2 sensors are reading like i may have a bad one so ill probably replace those. from my understanding a bad 02 wont cause slow starting so im at a loss of where to begin.
cheers
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