1997 xj dies. hard to start. wont idle. help plz

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Dec 10, 2011 | 01:21 PM

mlb200180

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Newbie

Joined: Feb 2011

Posts: 12

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From: Kansas City

Year: 1998

Model: Cherokee

1997 xj dies. hard to start. wont idle. help plz

On a cold start, i have to feather the gp to get it to start then once it starts i have to keep feathering it until it maintains idle speed. After it idles for about 10-15 min it dies. Ive replaced IAC, coolant temp sens, wires/plugs/cap/rotor. CEL came on and i had a p0138 02 sensor circuit high voltage bank 1 sensor 2. I was thinking about replacing the tps. When i unplug the brake booster the engine speeds up and when i plug it back in the engine dies. Any thoughts?

Dec 10, 2011 | 01:24 PM

Gee oh Dee

CF Veteran

Joined: Sep 2010

Posts: 21,168

Likes: 5

From: Milwaukee, WI

Year: 1987

Engine: Check

It could be an o2 sensor since a code was thrown for it...

Dec 10, 2011 | 01:39 PM

mlb200180

Thread Starter

Newbie

Joined: Feb 2011

Posts: 12

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From: Kansas City

Year: 1998

Model: Cherokee

Do after cat 02s affect drivability?

Last edited by mlb200180; Dec 10, 2011 at 01:42 PM.

Dec 10, 2011 | 07:03 PM

may pop

Seasoned Member

Joined: Nov 2011

Posts: 399

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From: Northern Illinois

Brake booster hose removed causes a very large vacuum leak which will cause a rise in RPMs. First fix the knows which is the OX sensor. It will help fix driveability problems.
Ron

Dec 10, 2011 | 07:47 PM

tjwalker

CF Veteran

Joined: Nov 2010

Posts: 5,841

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From: In the middle of Minnesota!

Year: 1999

Model: Cherokee

Engine: 4.0

Marginal available battery voltage can give you the symptoms you describe.

LOAD TEST the battery. Must be ruled in or out before moving onto other possibilities.