OP
Jeep doesn't want to start unless I put it on the charger
- Thread starter Mercy'04Wrangler
- Start date
OP
Seems you have a fuel pressure issue. Need to test the pressure at the fuel rail and see what's going on. Possible causes can be bad fuel pressure regulator, bad fuel pump or leaking injectors.
If battery was PROPERLY load tested than perhaps the cold weather with the constant cranking are too much for it.
If battery was PROPERLY load tested than perhaps the cold weather with the constant cranking are too much for it.
OP
ok. how are you with a volt meter? Need to do a current drain test. You disconnect the negative terminal, set the meter to DC A and put one lead on the battery post and one on the disconnected terminal. Hold it for a good 15 seconds and see where the current reading settles out and let us know what it is (or better yet, take a pic of the meter with the reading on it).
Not me, it's all of us on this forum that share knowledge that is amazing, not another one like it.
Tomorrow morning before your first attempt to start it, cycle the ignition switch On-Off-On six times and each time it's in the On position leave it in the On position for 2 seconds before the next on-off-on cycle. So each time it's in the On position leave it there 2 seconds before the next Off-On cycle. If the engine starts right up after that you have a bad fuel pump.
The fuel pump has a check-valve inside that is there to keep the gasoline in the engine from draining down out of the engine and back to the gas tank. If that check valve leaked and there's no fuel left in the engine it take multiple Start attempts which is really just giving the fuel pump more time to get fuel back up to the engine. Leaving the key on to keep the fuel pump energized doesn't work because the fuel pump automatically shuts itself off after 2 seconds if the engine didn't start. That's why we're turning the pump on six times via the ignition switch being turned to the On position so the pump has extra time to get fuel all the way back up to the engine.
The fuel pump has a check-valve inside that is there to keep the gasoline in the engine from draining down out of the engine and back to the gas tank. If that check valve leaked and there's no fuel left in the engine it take multiple Start attempts which is really just giving the fuel pump more time to get fuel back up to the engine. Leaving the key on to keep the fuel pump energized doesn't work because the fuel pump automatically shuts itself off after 2 seconds if the engine didn't start. That's why we're turning the pump on six times via the ignition switch being turned to the On position so the pump has extra time to get fuel all the way back up to the engine.
JKP
TJ Addict
I don't think anyone stated it conclusively, but the voltage regulator is in the PCM on a TJ. If the voltage regulator is bad, you can either replace the PCM, or there are conversions to an external voltage regulator.