starts but bogs down and dies

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Aug 8, 2010 | 06:38 PM

hillbillygmc

Thread Starter

Newbie

Joined: Aug 2010

Posts: 3

Likes: 0

Model: Cherokee

starts but bogs down and dies

Hey Guys, I’ve been having a problem with my 1990 Cherokee 4.0. All of a sudden it started to have this problem. I went to start it and it would turn over but bog down and die after about 5 seconds. I changed the fuel filter and that made an improvement…i was able to get it to run for about 15 seconds. Starts up fine but loses idle, bogs down and sputters out. If I step on the gas it bogs down quicker and dies. I went through and tried to find the problem with no luck.

Here is what I have checked or replaced….
Replaced the O2 sensor, fuel pump and filter. Replaced the throttle response sensor. Replaced cap, rotor, plugs and wires a year ago. I checked the egr and it “seems” fine. The cat does not appear to be blocked.

I don’t know what else to do but take it to a mechanic….which I can’t really afford to do. Any ideas? Thanks

Aug 8, 2010 | 07:11 PM

hillbillygmc

Thread Starter

Newbie

Joined: Aug 2010

Posts: 3

Likes: 0

Model: Cherokee

forgot to mention.....cleaned out the throttle body. Als, checkedfor vacume leaks, could not hear any.

Aug 8, 2010 | 08:08 PM

firstime00XJ

Senior Member

Joined: Jan 2010

Posts: 712

Likes: 0

From: MI

Year: 2000

Model: Cherokee

Engine: 4.0 I6

Did the 90's have a throttle position sensor? I would check that. I had an '87 F150 that did that and it was the TPS.

Aug 8, 2010 | 08:19 PM

hillbillygmc

Thread Starter

Newbie

Joined: Aug 2010

Posts: 3

Likes: 0

Model: Cherokee

yeah, i swapped it out and no difference. returned the new one, got my 75 bucks back and put the old one back in.....

Aug 8, 2010 | 08:44 PM

THENNING

Senior Member

Joined: Apr 2010

Posts: 895

Likes: 0

From: PA

Year: 1999

Model: Cherokee

Engine: 4.0 6 cylinder

could be a leak in the intake manifold vacuum...that or the throttle plate could be dirty

Aug 8, 2010 | 08:45 PM

THENNING

Senior Member

Joined: Apr 2010

Posts: 895

Likes: 0

From: PA

Year: 1999

Model: Cherokee

Engine: 4.0 6 cylinder

sorry didnt see you checked that already

Aug 8, 2010 | 10:48 PM

firstime00XJ

Senior Member

Joined: Jan 2010

Posts: 712

Likes: 0

From: MI

Year: 2000

Model: Cherokee

Engine: 4.0 I6

Maybe you could do a compression test. I'm glad you got your money back!

starts but bogs down and dies

starts but bogs down and dies

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