1994 Jeep XJ Hard cold start

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03-09-2018, 08:41 PM

ServinMn

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Model: Cherokee(SJ)

1994 Jeep XJ Hard cold start

My 1994 Jeep XJ has hard starting problems when cold, under 50. Not battery, running dual batteries. Not crank sensor, replaced 4 months ago. Recent tune up, plugs, coil & wires. When it is cold I get no check engine light or fuel pump. If I leave ignition on, check engine light and fuel pump activate after several min. Auto shut down relay replaced also. After it is warm start on first crank. Any suggestions?

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03-09-2018, 10:00 PM

bada$$91xj

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Year: 2001

Model: Cherokee

Engine: 4.0L HO

if its cold and damp could be a exposed wire thats pulling moisture in on it.

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03-09-2018, 10:54 PM

ServinMn

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No, normal operation. no check engine light. just hard cold start. What drivers fuel pump and check engine light at ignition on condition?

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03-09-2018, 10:56 PM

ServinMn

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It acts like something needs to warm up,

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03-09-2018, 11:01 PM

ServinMn

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No wires exposed.

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03-09-2018, 11:17 PM

MonacaYankee

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Year: 99 94

Model: Cherokee (XJ)

Engine: I6

https://www.cherokeeforum.com/f2/hel...d-9105/index2/

Good info here.

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03-10-2018, 12:02 AM

ServinMn

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Double checked everything, Neutral safety has been acting up. What is the negative if I bypass that?

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03-10-2018, 12:38 PM

freegdr

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Year: 1989 xj sport 2dr

Model: Cherokee

Engine: 12 hole bosch Injectors

You mean no power when key is first turned correct ? Possible ignition switch issue ?

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03-10-2018, 04:19 PM

BlueRidgeMark

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Year: 1998 Classic (I'll get it running soon....) and 02 Grand

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Engine: 4.0

Quote:

Originally Posted by freegdr

You mean no power when key is first turned correct ? Possible ignition switch issue ?

I'm with you - the problem is not clearly defined.

Quote:

Originally Posted by ServinMn

When it is cold I get no check engine light or fuel pump. If I leave ignition on, check engine light and fuel pump activate after several min.

Please define "several min".

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03-10-2018, 11:17 PM

#10

MonacaYankee

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Year: 99 94

Model: Cherokee (XJ)

Engine: I6

Quote:

Originally Posted by ServinMn

Double checked everything, Neutral safety has been acting up. What is the negative if I bypass that?

No reverse lights. Can start in gear.

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03-11-2018, 06:41 AM

#11

ServinMn

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Several min after I turn on the ignition. any where from 2-5 min with ignition on the check engine light and fuel pump come on. Then I have to cycle ignition at lease 4 times to start truck. I guess priming the fuel system.

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03-11-2018, 11:36 AM

#12

BlueRidgeMark

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Year: 1998 Classic (I'll get it running soon....) and 02 Grand

Model: Cherokee (XJ)

Engine: 4.0

Yeah, sounds like it's priming that gets you started, but 2-5 min ignition on before the check engine light and fuel pump come on?

I'd be looking at the computer.

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03-11-2018, 06:52 PM

#13

freegdr

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Year: 1989 xj sport 2dr

Model: Cherokee

Engine: 12 hole bosch Injectors

Quote:

Originally Posted by ServinMn

Turn key to run and check for power at fuse box under dash above brake pedal .

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03-11-2018, 08:04 PM

#14

djgrayxj

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Year: 1988

Model: Cherokee

Engine: 4.0

Mistake

Last edited by djgrayxj; 03-11-2018 at 08:09 PM.

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03-16-2018, 05:24 PM

#15

ServinMn

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Have power when key is turned. Not a switch issue. No check engine light or fuel pump for several mins. After that I have to cycle key several times, at least 4 for it to start. I am heading to J/U in the morning to pull a computer or 2 and see if that is the problem.

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