Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: donk498 on January 17, 2013, 05:11:05 PM

Title: 97 TJ 2.5 loss of power
Post by: donk498 on January 17, 2013, 05:11:05 PM

A mates 2.5 tj loses power when driven at motorway speeds for 5 mins or so. Its ok round town etc but once its been at 65-70 for a bit loses power and won't rev. Once you've slowed down it goes back to normal. Anyone had a similar fault?

 I'm thinking maybe fuel pressure dropping when the pumps working harder or maybe the cat on way out.

Cheers

Title: Re: 97 TJ 2.5 loss of power
Post by: Wildfire on January 17, 2013, 05:19:05 PM

It may be the Fuel Filter - as the filter gets clogged up the differential pressure across it rises, therefore the pump needs to work harder to flow through the filter. Whilst it may be fine at slow speeds as the flow through the filter is sufficient, at high speeds where the flow is greater, the amount of fuel passed through will limit his top speed and response.

Title: Re: 97 TJ 2.5 loss of power
Post by: Mike Pavelin on January 17, 2013, 07:24:06 PM

Core in cat breaking up and obstructing exhaust

Title: Re: 97 TJ 2.5 loss of power
Post by: gazjeep on January 17, 2013, 07:59:20 PM

Yep, had that. Is the cat rattling at all ?

Title: Re: 97 TJ 2.5 loss of power
Post by: Bulldog67 on January 17, 2013, 08:21:05 PM

4 cylinders have fallen off

Title: Re: 97 TJ 2.5 loss of power
Post by: jebbench on April 27, 2013, 08:17:14 PM

Quote from: Mike Pavelin on January 17, 2013, 07:24:06 PM

Core in cat breaking up and obstructing exhaust

Cat replaced an it's running A LOT smoother.

Made it a junction up the motorway without ending up on the hard shoulder :-)

Thanks for the advice.