Powderhound
NAXJA Forum User
- Location
- Missoula, Montana
Hey guys,
I researched yesterday, and all this morning, and I think I've nearly nailed the problem.
Yesterday, I went to start the jeep (1991, 4.0, manual, 5" lift) and, it started for 2 or 3 seconds, then died. I sprayed some carb cleaner in the TB, and nothing. So I researched, and was fairly sure it was the CPS. Last night a buddy came over and I was able to check the spark by pulling a plug, and I have good blue spark.
So, I went to check the schrader valve on the fuel rail, and I push it, and nothing comes out, leading me to believe it's not getting any fuel. To be sure, I swapped relays and jumped the ballast resistor. Still, no pressure/fuel at the schrader. I DO hear the pump prime when the key is switched to on.
I do not have a volt meter, and I'm stuck at home at the moment. However, my testing and researching leads me to believe that my fuel pump is dead. I figure if I can hear it priming, that the electrical is good. I also figure that if I've got good spark, it's likely not the CPS. I replaced my distributor, cap, rotor, plugs, leads, battery and starter for high end stuff last summer too.
(It is 20F here in Utah too, but this thing has never had an issue starting in the cold, even in the brutal Alberta -35C cold)
I'm going to pull the pump this afternoon, and pick up a new one from the dealership tomorrow. Any other ideas/confirmations before I do this? Thanks for everything guys, without , I don't think I could keep the XJ running!
I researched yesterday, and all this morning, and I think I've nearly nailed the problem.
Yesterday, I went to start the jeep (1991, 4.0, manual, 5" lift) and, it started for 2 or 3 seconds, then died. I sprayed some carb cleaner in the TB, and nothing. So I researched, and was fairly sure it was the CPS. Last night a buddy came over and I was able to check the spark by pulling a plug, and I have good blue spark.
So, I went to check the schrader valve on the fuel rail, and I push it, and nothing comes out, leading me to believe it's not getting any fuel. To be sure, I swapped relays and jumped the ballast resistor. Still, no pressure/fuel at the schrader. I DO hear the pump prime when the key is switched to on.
I do not have a volt meter, and I'm stuck at home at the moment. However, my testing and researching leads me to believe that my fuel pump is dead. I figure if I can hear it priming, that the electrical is good. I also figure that if I've got good spark, it's likely not the CPS. I replaced my distributor, cap, rotor, plugs, leads, battery and starter for high end stuff last summer too.
(It is 20F here in Utah too, but this thing has never had an issue starting in the cold, even in the brutal Alberta -35C cold)
I'm going to pull the pump this afternoon, and pick up a new one from the dealership tomorrow. Any other ideas/confirmations before I do this? Thanks for everything guys, without , I don't think I could keep the XJ running!