Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Green Jeep on May 04, 2011, 09:57:48 PM

Title: XJ Cherokee 4.0 1996 low on power....
Post by: Green Jeep on May 04, 2011, 09:57:48 PM

Think I may have somethink bad going on... from cold starts fine, idle ok, not smooth though.... struggles to build revs and back fires, better when warm, but low on power and sounds like its running on 5, usual stuff done, plugs, leads, dizzy cap, rotor arm...

Gunna do a compression check tomorrow, it's done 105,000 miles, maybe a burnt valve? No water in oil.

Just wondering if there is a 'limp home' mode that could have been triggered?

Or any other idea's? Fuel filter looks new and no kinks in fuel line, air filter removed and no difference.

As ever, thanks in advance Maf

Title: Re: XJ Cherokee 4.0 1996 low on power....
Post by: Bubba on May 04, 2011, 09:58:59 PM

o sensor problem can do that

Title: Re: XJ Cherokee 4.0 1996 low on power....
Post by: MOCAJ on May 04, 2011, 10:00:44 PM

 :iagree:

Title: Re: XJ Cherokee 4.0 1996 low on power....
Post by: Bishops Finger on May 04, 2011, 10:42:48 PM

As they say...

Title: Re: XJ Cherokee 4.0 1996 low on power....
Post by: Green Jeep on May 05, 2011, 07:20:20 AM

Thanks guys, where does that little fella live then?

Title: Re: XJ Cherokee 4.0 1996 low on power....
Post by: Bishops Finger on May 05, 2011, 12:41:45 PM

Bell Housing??

Title: Re: XJ Cherokee 4.0 1996 low on power....
Post by: JamesH on May 05, 2011, 01:00:10 PM

??

Exhaust manifold downpipe if we are talking about the O2/oxygen/lambda sensor

Got mine from Jeep in the end after Lighthouse and Mansfield could decide if they wanted to sell me one because there are different types and they couldn't confirm which one I had! About £65 2 years ago (non-dealer was ~£45)

Title: Re: XJ Cherokee 4.0 1996 low on power....
Post by: Green Jeep on May 08, 2011, 01:57:59 PM

Just tried Lambda sensor, still the same, idle lumpy, backfires when trying to rev, will try coil next... any other ideas?

Thanks in advance Maf

Title: Re: XJ Cherokee 4.0 1996 low on power....
Post by: Mike Pavelin on May 08, 2011, 02:00:57 PM

Collapsed cat core

Title: Re: XJ Cherokee 4.0 1996 low on power....
Post by: Green Jeep on May 09, 2011, 02:53:15 PM

Quote from: Mike Pavelin on May 08, 2011, 02:00:57 PM

Collapsed cat core

Thanks, just had a look at it and its had a proper good wallop, will disconnect and fingers crossed... thanks again Maf

Title: Re: XJ Cherokee 4.0 1996 low on power....
Post by: Green Jeep on May 09, 2011, 03:13:37 PM

Quote from: Green Jeep on May 09, 2011, 02:53:15 PM

Quote from: Mike Pavelin on May 08, 2011, 02:00:57 PM

Collapsed cat core

Thanks, just had a look at it and its had a proper good wallop, will disconnect and fingers crossed... thanks again Maf

Nope cat empty, removed completly still same deal... back to the drawing board....