Stalls in gear

[Jaxso32]

Well i could use some help, last night on my way back to school my jeep died completely and had to be towed. it drove just fine for about 25-30 miles than right after 1 of many hills it started to misfire like crazy when in gear and under basically any load it would bog down and almost stall if i didnt disengage the clutch. i limped it into a town and it died completely and started checking everything i could,

Relay for fuel pump was bad, swapped it and it started and would idle but poorly and would still misfire and almost stall when in a gear.

i had checked the cps 2 days before and it had an AC output of 0.56 V. 

Bosh Fuel pump was new less than a month ago

Plugs, wires, cap and rotor are all less than a year old

Pulled exhaust off after the intermediate pipe still ran the same

Throttle body is less than 6 months old

Exhaust/Intake gasket and Exhaust manifold less than 6 months

 

any ideas what I'm missing or what it could be that is causing it would be appriciated

[Marine1Texas]

for me this happens when I get a small whole in the fuel line in the tank above the fuel pump. The truck runs but become under powered while in gear. I always test the fuel pressure and it is low. Then before I replace pump, I pull fuel sender and pump to find the whole in the fuel line on top of the fuel pump.

 

This is just one thing it can be, rent your self a pressure tester for the fuel line.

I my self have never had the relay blow for fuel relay however, if pump is work really hard pumping gas in a loop I could see it drawing higher amps then normal. After fuel test I would check your wiring too, from relay and to pump. you maybe getting a short which can and will blow a relay. Also causing a lower voltage that then the pump needs to keep up.

 

Also one thing to check and update is the ground for your fuel pump, it is located just behind the passenger tail light. refresh the ground however this would not cause a relay to blow.... 

[Jaxso32]

forgot to add in i tested the fuel pressure when i tested the cps it was 31 with regulator plugged in 39 with the regulator unplugged

[Jaxso32]

Added note pressure was just tested, 20-23 psi at the rail and unplugging the regulator does nothibg. Fuel pressure bleeds down to 0 fairly quick after the pump is turned off

[Marine1Texas]

I would check to see if you do have a small leak in the line in the tank above the pump.

 

for my two Comanche's they stay high pressure for some time after turned off.

[Jaxso32]

Ended up pulling the pump and sure enough the line from the pump to the sender was partially off on the sender side. Put it back on with some better clamps and it's running and driving again

[Marine1Texas]

awesome good to hear it!

[Jaxso32]

Thanks for the suggestion it definitely helped