Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: decaman on July 16, 2009, 11:49:13 AM

Title: 88 YJ stalling
Post by: decaman on July 16, 2009, 11:49:13 AM

Hi all,

Recently bought my YJ as a running project, have put it through the MOT, taxed, etc and its running reasonably well now except for a stalling issue.

Its a 4.2 automatic and will idle without a problem in both Park and Neutral, however once I select either Drive or Reverse the revs drop and it will cut out or splutter.  It is drivable if I brake with the left and keep the revs up with the right, but annoying. 

Any advice would be greatly appreciated.

Thanks much.

Title: Re: 88 YJ stalling
Post by: jimyj on July 16, 2009, 12:00:21 PM

mmmm, where to start  :icon_rolleyes: this is very common on 4.2 esp with the auto box . check all the vacuum hoses and there are MANY , but i suspect its the stepper motor , which is attatched to the back of the carb , be wary of stripping the carb , its a nightmare bit of rubbish , controlled by its ecu  :jpshakehead:
  If your gonna keep it , go for a weber and ditch the lot , far better mpg , and more power .
  Sorry to be a bit negative ,but  this set up was crap new , and now being 20 years old is never gonna run right , if you had an mot recently , any idea what the co was , that might give you a pointer .

Title: Re: 88 YJ stalling
Post by: decaman on July 16, 2009, 12:07:40 PM

Thanks, points me in the right direction at least.

Thought it might be carb related.  Not too handy myself but willing to have a go so will poke around with the hoses and see what I can see.  Wouldn't be surprised to see some cracks, etc based on the jeep as a whole.

Thanks again.

Title: Re: 88 YJ stalling
Post by: Mike Pavelin on July 16, 2009, 06:14:33 PM

Almost certainly carb trouble.

Title: Re: 88 YJ stalling
Post by: Bubba on July 16, 2009, 07:46:41 PM

as jim says the webber is a very good relacement

but could it be as that the tickover is to low anyway hence the stalling try tweaking it slightly

Title: Re: 88 YJ stalling
Post by: decaman on July 17, 2009, 08:21:10 AM

Thanks both.

The Weber sounds like the best option.

How fool proof is it to install?  Do I need a specialised mechanic or could I have a go myself?

Read elsewhere on the forum that it will run reasonably well out of the box but the benefits are really derived when tuned.

Title: Re: 88 YJ stalling
Post by: wildwood on July 17, 2009, 11:06:51 AM

There are also 2 versions available the standard Twin choke which I think is 32/36 ie at lower throttle 1 choke, the smaller, is open and then when you mash the skinny pedal the other larger choke opens as well.
Then there is the 36/36 which .... well just gives you more!!!!  Now I wonder which one I would go for??

Title: Re: 88 YJ stalling
Post by: jimyj on July 17, 2009, 12:08:00 PM

Yep its an easy job to do your self , sure Webcom will have the kit listed on there web site still , cant believe they are a fast mover anymore .
  It comes as a complete ready to run kit including all the adaptors to fit it . Last time i bought one it was about £235  :greggmo:

Title: Re: 88 YJ stalling
Post by: Panic mechanic! on July 17, 2009, 12:56:29 PM

try the nutter bypass? its used a lot in the states and they seem to get on well with it ( incidently I know where you are coming from cos our 87 was similar, I am going to swap in a 4.0 ho tho to sort my prob)