After replacing fuel pump it run when it wants to.
Replaced fuel pump, Ran fine a couple of hours. After parked overnight ,won't start , Two days later it magicly starts. Check fuel pressure running it's around 45 pounds.Runs great for another day and a half .Then next morning won't start. Put fuel pressure gauge back on .turn on key, It registers nothing,0 PS I've replaced fuel filter and relay,and fuse is still good. Maybe it wasn't the fuel pump in the first place. Anybody chime in at anytime. Thanks!
Re: After replacing fuel pump it run when it wants to.
In our shop we have had the same problem before, it turned out to be a new defective fuel pump by Bosh, two bad ones in a row, try a ohm meter on the pump when it runs and when does not compare the numbers , if they are very different, try a new brand of pump.
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Considering it ran fine after pump replacement for awhile then it is probably a fuel issue. Couple things it could be. 1. you could have a ton of sediment in gas tank and it keeps clogging up your pump. 2. you could have blocked fuel filter and or clogged injectors.
The fault code P0322 means "Ignition/Distributor Engine Speed Input Circuit No Signal" The P1544 means "Seat Direction Switch Assembly Circuit Open" The P0121 means "Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem" when you know the code, you can most likely repair it yourself. _______________________ elm327 bluetooth scanner
I wouldn't think catalytic converter, without it giving some indication that it was going bad, but without testing it is hard to say.
When it cranks and won't start, check for battery voltage to the coil on the dark green wire, with key ON. If you have power at the coil, it might be a bad coil. If no power to the coil, it could be a Crank Position Sensor or the Cam Position Sensor inside the distributor. If one of those is bad, it can stop the computer from sending power to the coil. Good luck.
I think you should check your battery and alternator.If they both check good you may have a battery draw,something draining the battery over night.Check your doors make sure they are closing like they should.
if you have an electric fuel pump that would explain the hum. unhook your incoming fuel line and blow the line clear, sounds like you've got some junk in your tank.it'll build up on the screen in the tank then fall off (at least partially) when your making turns or hitting bumps or holes. next time it's only got a gallon or so of fuel i'd drop the tank and check the pickup tube inside. sux but that's the only way to get to it. while you've got the tank off and out from under the jeep, might as well clean it out real good and replace anything inside (usually the screen) that doesn't look right, dirty etc. wouldn't hurt to run a bottle of fuel system cleaner in the next full tank of fuel either. preferably as soon as you put your tank back. good luck