Hey all. I've been dealing with this issue quite sometime now. I'll start from the beginning, because it could have been the culprit all along. I bought the Jeep around 4 years ago. Didn't drive it much, but never had any starting or dying issues. Started good, ran good. I had it probably 6 months and my son was driving it and ran it out of gas. We all know the fuel gages can be wonky. Anyways, it ruined the fuel pump. I got the fuel pump replaced and it fixe the issue but jeep has ever really been the same since. It started dying when coming to a stop. Most of the time would start back up right then. If not, a day or two later would start up and run fine for a month or two. Died on me once coming up and hill and I never could get it to start back. Had ignition coil replaced and seemed to be fix yet again. Ran almost a year and I noticed it really started noticing it was taking longer to start. Well it died on me a couple weeks ago and I've been pulling my hair out.
So even now, sometimes it fires right up and will run awhile. Sometimes it takes a while to start and then dies. And sometimes it will crank, crank, crank and no start. Next day might fire up. Started up earlier today and ran 10 minutes. Tried 20 minutes later, cranked but no start. Sometimes I can give it some gas by pushing pedal and it will start up and idle a little rough. It has never really been the same since fuel pump went out and was replaced over 3 years ago.
Currently here's what I have. I have spark, I can hear the fuel pump prime. Occasionally it doesn't when it's already primed, but I was think that was normal??? I have 31 psi at fuel rail when turning ignition on. It will eventually bleed down to 0 (zero) but it does have pressure when you turn key over. So gradually losing fuel somewhere. Maybe check valve. I've swapped and tested relays. I've checked voltage going to fuel pump and getting 12.65 volts. Jeep has new plugs, wires, distributor, crankshaft position sensor, Temperature coolant sensor. Fuel regulator seems to be working. I can disconnect it and pressure will jump 8 -10 psi. I did find the connector for fuel pump on the jeep harness side had a aftermarket connector and butt joints were near broken from wires and the orange power wire near connector was pulled back and so was ground. I thought maybe it was shorting out and causing it to die. Fixed all that with solder and heat shrink.
If anybody has any ideas of this intermittent issue, I most certainly welcome it. I'm desperate at this point! Could I have gotten a faulty fuel pump and causing me problems all along and its getting worse? I'm pretty sure check valve isn't great but should stat if I'm getting that kind of pressure at rail? Also, I am pretty sure the fuel sending unit is wonky based on resistance readings form sending unit wire (brown) to ground If fuel level in tank stays the same it should not be getting polar opposite readings. Any thanks in advance for any help you can provide!
So even now, sometimes it fires right up and will run awhile. Sometimes it takes a while to start and then dies. And sometimes it will crank, crank, crank and no start. Next day might fire up. Started up earlier today and ran 10 minutes. Tried 20 minutes later, cranked but no start. Sometimes I can give it some gas by pushing pedal and it will start up and idle a little rough. It has never really been the same since fuel pump went out and was replaced over 3 years ago.
Currently here's what I have. I have spark, I can hear the fuel pump prime. Occasionally it doesn't when it's already primed, but I was think that was normal??? I have 31 psi at fuel rail when turning ignition on. It will eventually bleed down to 0 (zero) but it does have pressure when you turn key over. So gradually losing fuel somewhere. Maybe check valve. I've swapped and tested relays. I've checked voltage going to fuel pump and getting 12.65 volts. Jeep has new plugs, wires, distributor, crankshaft position sensor, Temperature coolant sensor. Fuel regulator seems to be working. I can disconnect it and pressure will jump 8 -10 psi. I did find the connector for fuel pump on the jeep harness side had a aftermarket connector and butt joints were near broken from wires and the orange power wire near connector was pulled back and so was ground. I thought maybe it was shorting out and causing it to die. Fixed all that with solder and heat shrink.
If anybody has any ideas of this intermittent issue, I most certainly welcome it. I'm desperate at this point! Could I have gotten a faulty fuel pump and causing me problems all along and its getting worse? I'm pretty sure check valve isn't great but should stat if I'm getting that kind of pressure at rail? Also, I am pretty sure the fuel sending unit is wonky based on resistance readings form sending unit wire (brown) to ground If fuel level in tank stays the same it should not be getting polar opposite readings. Any thanks in advance for any help you can provide!