Help! Cherokee hard to start when COLD.

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Mar 3, 2009 | 12:17 PM

#16

Throttle Jockey

Senior Member

Joined: Feb 2009

Posts: 811

Likes: 0

Model: Cherokee

fuel pressure regulator

Quote:

Originally Posted by 91 Laredo

Update (somewhat) - i had a dakota with the same prob, fuel pressure regulator leaking off rail pressure when it sat over night.

It was 30 degrees when I left work this morning.

I read somewhere that someone was having a similar issue and would "double prime" the fuel pump. Basically turn the key on, then off, then on again.

Gave it a shot and while the Jeep had the slightest hesitation to start, it fired almost immediately, didnt die, and idled correctly.

I emailed the PO, and she stated she honestly has never had this problem on the past (I believe her).

Is it possible that when I degreased the motor something happended? Wet sensor or something?

regulator may be bleeding off fuel pressure. its like running out of fuel every night, has to reprime the system when you start.

Mar 3, 2009 | 12:24 PM

#17

00xjgawes

Newbie

Joined: Jan 2009

Posts: 1

Likes: 0

Model: Cherokee

double check your battery...

Mar 3, 2009 | 01:48 PM

#18

91 Laredo

Thread Starter

Seasoned Member

Joined: Jan 2009

Posts: 293

Likes: 0

Year: 1994

Model: Cherokee

After cleaning out the T-body it seems to have corrected the issue for the most part. I still turn the key on and let it sit for a few seconds before cranking her and she fires right up.

Now to increse the fuel economy......

Feb 4, 2015 | 10:14 PM

#19

Wet Willie

Newbie

Joined: Feb 2015

Posts: 2

Likes: 0

From: Michigan

Year: 2000

Model: Cherokee

Engine: 4.0

Spark Plugs and Coil Pack

I have tried everything I could, cleaned my throttle body, changed my battery, fuel pump, I feel like there is more but I cant think of them but I finally think I found out what it was. I changed my spark plugs and coil pack and I think it played a big role that I made sure the gap was at .035. Starts up beautiful each time, even at -20F its firing right up so if you have this problem I'd start by checking the gap on your spark plugs. Good luck!