PDA

View Full Version : 5th Cyl. shut down

Gnat5680
August 9th, 2006, 12:19
im helping a friend out. she owns a 01 Xj. im not sure the engine specs. but when it hit 75 or so it will shut off gas to the 5th cyl. the mechanic who said that could not fix it and right now the engine light is on.

any ideas???

please ask questions. i do not know what to say in here on this sublect.
ksdan
August 9th, 2006, 12:41
take it to another mechanic?
Gnat5680
August 9th, 2006, 13:43
i also forgot to say that it vibrates like its gonna shake it apart.
DaffyXJ
August 9th, 2006, 14:04
Okay, I'll bite and ask a few.
How do you know it's fuel and not the spark that is inhibited?
Have you read the code?
At what RPM's is the engine at 75 MPH?
Was it just once or is it repeatable?
Have you looked at, gone through, changed anything? Such as coil packs or spark plug wires?
At what RPM/speed does it come back on or run better? Or do you have to go through an off-on cycle for it to run smooth?

Okay that should start the ball rolling.
Chero-King
August 9th, 2006, 14:06
X2 on the spark plug wires and plugs. I had my Stratus do that but it lost the cylinder right from take off, turned out one of the wire broke and the clip that holds it the spark plug was stuck on the plug.
anony91xj
August 9th, 2006, 14:28
X2 on the spark plug wires and plugs. I had my Stratus do that but it lost the cylinder right from take off, turned out one of the wire broke and the clip that holds it the spark plug was stuck on the plug.
The '99 has a coil rail, no wires.

For starters, what is the code that's throwing the CEL?
SanDiegoXJ
August 9th, 2006, 14:33
Hmmmm....thats a fun one =)

I'm assuming you got that its the #5 cylinder by reading some code, yeah?

Were there any other codes?

I'd say get those and go from there.

But if I was sure that it was only the #5 cylinder not getting gas, my first suspect would be the injector.
Chero-King
August 9th, 2006, 15:13
The '99 has a coil rail, no wires.

For starters, what is the code that's throwing the CEL?


Oh ok, Im not too familiar with the new ones.
langer1
August 9th, 2006, 17:34
Oh ok, Im not too familiar with the new ones.
CEL? Check Engine Light.
WI88XJ
August 9th, 2006, 17:35
The '99 has a coil rail, no wires.

The 'coil rail' didn't come out until '00.
Chero-King
August 9th, 2006, 19:30
CEL? Check Engine Light.

I actually was referring to not knowing about the coil rail.
anony91xj
August 9th, 2006, 22:34
The 'coil rail' didn't come out until '00.

My fault..he said the XJ was an '01. I said '99, meant 01. Either way, the XJ in question doesn't have a distributor or wires.

We still don't know what codes are causing that CEL...?
Gnat5680
August 13th, 2006, 18:34
sorry it took forever. she got the reading from a mech. up north. i don't know the codes but the guy said the code said it was the 5th cyl.

i will try to get more info from her.
carnuck
August 13th, 2006, 22:52
It may be one of the ones with a bad head. Cracked cyl head and valve guides in at least 20 late model 4.0L Jeeps I have connected with in the past few years.