ScottATL
Junior Member
- Joined
- Aug 3, 2015
- Posts
- 5
- Reaction score
- 3
- Ram Year
- 2002 Ram 1500 SLT Long bed
- Engine
- 4.7 4WD
Can’t get truck to start…
2002 Dodge Ram 1500 SLT 4x4 longbed 4.7L 130,000 miles
Background: last 6 mo, the idle would "intermittently" fluctuate from 400-100 rpms. Not sure if this has anything to do with current issue. Truck has always started without hesitation.
Other day the truck would crank but not fire. It caught finally and came to life. Then when left to idle it would die out. But crank back up. The next day I had issues with it again, we were heading to our 18yr olds beach birthday party. The truck finally started and I had issues driving there, that I would have to keep my foot on the gas so it didn’t die out. a couple times during the ride I noticed the speedometer jump from 35 down to 30 and back. not sure if it was electrical or if the the truck was just trying to die out. At the end of the day, I ended up having to have it towed back home as it wouldn’t start.
Checked all fuses and swapped relays around to rule them out.
Checked the fuel rail and had no pressure and also the gas gauge was not responding in the on position. Thinking that it was the fuel pump, we replaced it and found out that there was no current getting to the pump or the sending unit.
Bench tested the old pump and it worked. We proceeded to hot wire the pump to the fuse box to energize the pump and got the fuel rail to pressurize, but the truck would still not start.
During all this we, a couple times, tried using starter fluid to get the truck to start, which it did on 2 occasions for about 2 seconds. Repeated attempts since then have failed to get the engine to fire.
All instrument gauges except for the gas gauge work fine and when checked for codes, nothing registered.
Decided a quick stab in the dark would be to replace both the camshaft AND crankcase positon sensors. – Nothing.
Any help in diagnosing this would be appreciated.
Thanks,
Scott
2002 Dodge Ram 1500 SLT 4x4 longbed 4.7L 130,000 miles
Background: last 6 mo, the idle would "intermittently" fluctuate from 400-100 rpms. Not sure if this has anything to do with current issue. Truck has always started without hesitation.
Other day the truck would crank but not fire. It caught finally and came to life. Then when left to idle it would die out. But crank back up. The next day I had issues with it again, we were heading to our 18yr olds beach birthday party. The truck finally started and I had issues driving there, that I would have to keep my foot on the gas so it didn’t die out. a couple times during the ride I noticed the speedometer jump from 35 down to 30 and back. not sure if it was electrical or if the the truck was just trying to die out. At the end of the day, I ended up having to have it towed back home as it wouldn’t start.
Checked all fuses and swapped relays around to rule them out.
Checked the fuel rail and had no pressure and also the gas gauge was not responding in the on position. Thinking that it was the fuel pump, we replaced it and found out that there was no current getting to the pump or the sending unit.
Bench tested the old pump and it worked. We proceeded to hot wire the pump to the fuse box to energize the pump and got the fuel rail to pressurize, but the truck would still not start.
During all this we, a couple times, tried using starter fluid to get the truck to start, which it did on 2 occasions for about 2 seconds. Repeated attempts since then have failed to get the engine to fire.
All instrument gauges except for the gas gauge work fine and when checked for codes, nothing registered.
Decided a quick stab in the dark would be to replace both the camshaft AND crankcase positon sensors. – Nothing.
Any help in diagnosing this would be appreciated.
Thanks,
Scott