Cold start issue

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Mar 15, 2019 | 05:44 PM

#16

Bart Mack

Thread Starter

Newbie

Joined: Feb 2019

Posts: 12

Likes: 0

Model: Cherokee (XJ)

Next step?

So far have ruled out:
Not the IAC
Not the fuel pump relay
Not the ASD relay

Symptoms:
Starts then immediately shuts off
Sometimes will start and run fine after 3-4 key turns
Sometimes need to keep foot on the gas until it’s past the first tick on the temp gauge, then runs fine
Once warm it runs reliably
*One time occurrence started warm, ran very rough, sputtered, and pressing the gas pedal had no reaction or any increase in idle, stayed running and problem corrected itself after about 1 minute.

I think my my next attempt will be replacing the Throttle Position Sensor as that looks from YouTube like something I can handle. After that... time to find a shop that has the skill and equipment to track down the issue. My technical skill and knowledge are limited.

Mar 15, 2019 | 06:19 PM

#17

gat

Senior Member

Joined: Mar 2016

Posts: 621

Likes: 9

From: Oklahoma

Year: 1992

Model: Cherokee

Engine: 4.0L L6 PowerTech (stock)

I scanned the previous posting. What is the fuel pressure before training the key to the run position, while cranking, and after cranking +10 seconds when it doesn't start?
If you are sitting at the correct pressures, then we can rule some things out. You can "rent" a fuel pressure tester for free from sorts stores like O'Rielly's.

Nov 1, 2019 | 07:31 AM

#18

MOguy

Newbie

Joined: Oct 2019

Posts: 8

Likes: 0

From: Missouri

Year: 1999

Model: Cherokee (XJ)

Engine: 4.0

Not sure if the OP got his issue resolved. I had the issue and what worked for me (maybe a complete coincidence and it fixed itself????) was locking and unlocking the rear tailgate a few times with a key and unlocking and unlocking all the locks with the switch on the passenger door. Supposedly if it gets cold enough the voltage in the battery for a moment confusing the security system. The locking and unlocking resets the security system. It worked for me. Sounded crazy to me but it SEEMS to have worked.