My 93 YJ runs pretty good has 4 cyl. When I go to start it hot or cold it has to crank several times before it starts maybe like 6 or 7. But if I stop cranking before it starts then hit it again fires up right now. I was wondering if anyone knew what could cause this. Not much knowledge on fuel injected motors always had carbs. Maybe fuel pressure regulator or injectors?
12-05-2008 06:38 PM
Hello crash: If the motor starts after you let up on the key it could be your ignition switch.
12-05-2008 08:52 PM
sounds to me like it cranks longer than usual. common problem, usually fuel pressure is leaking down from the check valve in the fuel pump. taking longer for fuel to reach the fuel rail and start the jeep.
check your fuel pressure if possible. most jeeps don't have an external pressure regulator, if you did it would be on the fuel rail, and have a vacuum line going to it. almost no jeeps have them though, its all in the tank.
usually replace the fuel pump assembly, not sure if you can do the valve seperate.
12-07-2008 03:14 PM
I believe you are right,the check valve is not replaceable by itself.
12-07-2008 04:28 PM
My battery used to die when Id try to start cuz I had to crank it so much would that be caused by the same thing?
12-07-2008 04:32 PM
Thanks guys I'm gonna have the presssure checked Probably end up replacing the fuel pump.
11-27-2010 09:36 AM
let me know how that works out. having similar problems with 93 2.5 litre. Gets worse as the temp is dropping though
11-28-2010 01:30 PM
On the 94s there is a fuel pressure regulator located on the front of the injector rail.
11-28-2010 08:17 PM
I would start with a good service manual and follow the diagnostics in the troubleshooting section, sometimes it pays to take it slow and verify a faulty componet before you swap and pray.