Accelerator pump

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Jul 30, 2009 | 10:53 PM

i3lomeh

Thread Starter

Newbie

Joined: Jul 2009

Posts: 10

Likes: 0

Model: Cherokee

Accelerator pump

Where is it located on a 1990 Cherokee Laredo. Im having issues with engine boging and stumbling. The manual say replace the accelerator pump. Any ideas

Jul 30, 2009 | 11:08 PM

Abovetimberline

CF Veteran

Joined: Jul 2009

Posts: 2,158

Likes: 11

From: Chico,ca

Year: 89

Model: Cherokee

Engine: 4.0

What engine do you have? If you have fuel injection you will not have an accelerator pump.

Jul 30, 2009 | 11:15 PM

ol"blue

CF Veteran

Joined: Mar 2009

Posts: 28,068

Likes: 6

From: Tenn. and Mich.

Year: 2004

Model: Grand Cherokee

Engine: 4.7L V8

Quote:

Originally Posted by i3lomeh

Where is it located on a 1990 Cherokee Laredo. Im having issues with engine boging and stumbling. The manual say replace the accelerator pump. Any ideas

Fuel injected engines don't have an accelerator pump. Only carburators have an accelerator pump.
Check for a bad/dirty TPS.

Jul 31, 2009 | 01:47 AM

i3lomeh

Thread Starter

Newbie

Joined: Jul 2009

Posts: 10

Likes: 0

Model: Cherokee

I have the 4.0, I have only had it about 2 weeks. It bogs when you hit the gas hard. then revs and sounds good except a little stumble and Im not sure what to do next

Jul 31, 2009 | 09:51 AM

Abovetimberline

CF Veteran

Joined: Jul 2009

Posts: 2,158

Likes: 11

From: Chico,ca

Year: 89

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by i3lomeh

I have the 4.0, I have only had it about 2 weeks. It bogs when you hit the gas hard. then revs and sounds good except a little stumble and Im not sure what to do next

That could be caused by a few things,tps,fuel filter,injectors,fuel pump,wires,plugs,dist cap.
I would do a comp check on it and make sure it has good comp 120-150 just to insure it is mechanicaly sound and then try some injector cleaner,or change the fuel filter.