91 starts and dies...
Thread Starter
Seasoned Member
Joined: Mar 2011
Posts: 253
Likes: 1
From: Shawnee, Oklahoma
Year: 1987
Model: Cherokee
Engine: 4.2 .020 over
Ok I've went through the search feature and found a few different answers but to different problems than mine... 91 laredo... just bought it and starts and dies I've swapped all parts I can from my renix that I know work and still the same thing... starts then dies n that's it but I can keep it running by pouring gas in the tb and yes gas is going in the fuel rail and coming out... I bypassed the pressure regulator no change... swapped injectors outa my 87 no change... swapped map sensor no change...
Thread Starter
Seasoned Member
Joined: Mar 2011
Posts: 253
Likes: 1
From: Shawnee, Oklahoma
Year: 1987
Model: Cherokee
Engine: 4.2 .020 over
Even put my fuel pump in the 91 and bypassed the ceramic regulator to the fuel pump but still no change... now when I got it the battery was disconnected and when I hooked the battery cables up all the lights inside and out started flashing and couldn't get them to stop... everything quit flashing shortly after I emptied the fuse blocks in the cab and under the hood...
Junior Member
Joined: May 2013
Posts: 59
Likes: 0
From: virginia
Year: 1994
Model: Cherokee
Engine: 4.0
If it runs when you poor gas in manually and its pumping through the injectors and you have good pressure on fuel rail I would pull intake check if charred up around the injectors and inspect your valves. Also have you tried puttingcuses back in to see? Lights flashing etc possible wiring issue. I'm assuming you. Can only run it for a few seconds when you pour in gas did you pull any relays under the hood? Just check those my auto shutdown went out with similar symptoms just switch AC relay to, see. Hope that helpa
Thread Starter
Seasoned Member
Joined: Mar 2011
Posts: 253
Likes: 1
From: Shawnee, Oklahoma
Year: 1987
Model: Cherokee
Engine: 4.2 .020 over
All fuses and relays are currently in place as for everything shuting down I can't tell cause I'm out pouring gas in the throttle body... it'll stay running as long as I'm pouring gas in it.... I honestly don't think the injectors are getthing power... but what could cause that??
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Thread Starter
Seasoned Member
Joined: Mar 2011
Posts: 253
Likes: 1
From: Shawnee, Oklahoma
Year: 1987
Model: Cherokee
Engine: 4.2 .020 over
The only accessory that I know doesn't work is the radio... the previous owner pulled the all light bulbs from the cab area for some reason... but the blower motor works in all settings and all the exterior lights work...
Thread Starter
Seasoned Member
Joined: Mar 2011
Posts: 253
Likes: 1
From: Shawnee, Oklahoma
Year: 1987
Model: Cherokee
Engine: 4.2 .020 over
I've already changed fuel pumps, fuel filters and relays... no change... even bypassed the voltage regulator for the fuel pump...
Thread Starter
Seasoned Member
Joined: Mar 2011
Posts: 253
Likes: 1
From: Shawnee, Oklahoma
Year: 1987
Model: Cherokee
Engine: 4.2 .020 over
Only two things I haven't tried is locking and unlocking the hatch to see if maybe the security was triggered... or swapping out ecu's
Thread Starter
Seasoned Member
Joined: Mar 2011
Posts: 253
Likes: 1
From: Shawnee, Oklahoma
Year: 1987
Model: Cherokee
Engine: 4.2 .020 over
Only problem is... the jeep is 20 miles away from my bro's n his house is where I get on the internet to talk with y'all...
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors


