OK folks, I know I’m beating a dead horse with this one but just want other opinions before proceeding any further. Bought a 2000 Jeep TJ Sahara last June. It was losing fuel pressure and would have to try to start 2-3 times before starting. Would run fine after starting. I changed the whole module in September. In January, I replaced fuel lines. About the end of March/first of April, I started having issues with it not starting. Was told to change the Camshaft sensor. After changing it, it started great for 2 days. Then started back to not starting. Would wait about 10 minutes and wiggling wires, etc, it would start. Which brings me to the current issue and it not starting at all now. I’ve also changed the camshaft sensor. I put a fuel pressure gauge on and am not getting any pressure. Also am not hearing fuel pump kick on. I just can’t make myself say that it’s the fuel pump since I just changed it last year but yet knowing it probably is the problem. It was not a name brand pump when changed. I’m just curious if others have had the same issue. If so, is there anything else I could check before changing the pump?
No fuel pressure
- Thread starter Arkprologger
- Start date
Given that you’re not hearing the pump kick on and you’re not getting any fuel pressure, I’d recommend checking a few things before diving into replacing the pump again:
Check the fuel pump relay and fuse. A faulty relay can prevent the pump from receiving power, and sometimes fuses can be intermittent even if they look good.
Since you mentioned that wiggling wires helped in the past, make sure to inspect the wiring harness to the fuel pump. Look for any frayed wires or loose connections that could be causing intermittent issues.
I'm sure it goes without saying, but a poor ground can lead to all sorts of electrical problems. Make sure that the ground connection for the pump is secure and free from corrosion.
Use a multimeter to check for power at the fuel pump connector while turning the ignition to the "ON" position (do not start). If there’s power but the pump isn't running, it’s likely the pump is faulty even if it’s relatively new.
While you've replaced the camshaft sensor, keep an eye on other possible sensors as well, like the crankshaft position sensor, as they can also prevent the engine from starting.
If everything checks out and you're still not getting pressure, sadly, it may be time to consider replacing the fuel pump again, especially if it was an off-brand one. Sometimes aftermarket parts can be hit or miss in terms of reliability (i.e. Duralast).
Let us know what you find! Updates are always appreciated and help others who may eventually find themselves in the same situation.
Chris, thanks for the suggestions. I have checked all fuses and relays and all are good. I haven’t checked the ground yet. I’m really not wanting to dive into uncovering all the wires to find a broken or frayed but that is probably next.
You have a wiring problem. How do I know? Well, you have a TJ. The only thing I can’t say for certain is if your wiring problem is the direct cause of your current issue. 
Peel back that harness and start inspecting. You’ll find something, mark my words.
Peel back that harness and start inspecting. You’ll find something, mark my words.
Sorry it's taken so long to respond with the answer. Started a new job and haven't had time to get on. The issue was the fuel pump had quit. I didn't replace the wiring harness but someone had in the last 5 years I would say. At least you could still read the part number on the tag, so I know it wasn't the original. Had fire at the plug for the pump. Made a jumper wire to go over the plug and still nothing. Put a better pump than the previous one on and so far so good. Just couldn't make myself believe it was the pump since I had put a new one on about 7 months before all this started happening. Thanks for all those that responded.
Mac,
I ordered it from Extreme Terrain. Item number J166144. I had ordered one off of Amazon before for about $75. So far this one is holding up. But it's only been in the tank less than a month so it better be doing good!
I didn't want to start another thread so I thought I would ask here. Is 40 psi while the engine is running too low?
Just a touch. Should be 48.
Mine ran on 30 but you could see the PCM compensating in fuel trims and my gas mileage was down 1-2 mpg.
I'd start by verifying with another gauge.
-Mac
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