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Author Topic: Grand Cherokee ZJ 1996 fuel pump  (Read 1614 times)

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wildwood

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Grand Cherokee ZJ 1996 fuel pump
« on: June 26, 2014, 12:22:12 PM »
Got involved with a bit of a charity job here.....

My ex GC now owned by the BIL has an issue. Replaced lower control arms for him for the MOT but now does a bit of stuttering at 50 but is OK either side of this.(control arms obviously not related :jpshakehead:)
Local mechanic says fuel pump deffo , no questions..........


Factory type ones are either £95 from Eastern Europe or around £200 over here or a kit looking thing that looks like a pump with 2 wires is £40.... How's that work?

Obviously factory is the easy option but let's have your thoughts on this before I donate a day to tank out shenanigans :hysterical:
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Jonny Jeep

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Re: Grand Cherokee ZJ 1996 fuel pump
« Reply #1 on: June 26, 2014, 12:45:07 PM »
If the problem is only around 50mph and OK at all speeds above that, when there's more load on the pump i ddon't see how it could be the pump. I'd have though TPS would have been more likely
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wildwood

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Re: Grand Cherokee ZJ 1996 fuel pump
« Reply #2 on: June 26, 2014, 01:03:23 PM »
Agree TPS threw up a prob like that when I had it..... not knowing what gear it should be in and needing to be driven on a very gentle throttle to baby it home.... TPS change and done......

Also when I was towing more than I should to Break Out Last year...... stuttering and not wanting to pull in any gear......but sure this was trans related as has never happened since it never tows now!
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JamesH

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Re: Grand Cherokee ZJ 1996 fuel pump
« Reply #3 on: June 26, 2014, 01:08:50 PM »
Test fuel pressure - potentially even while driving (passenger). I've got a gauge you can borrow if you like. Maybe scan for codes too.

As you know, it can be a couple of sensors or the fuel pump, best to find out which rather than just replace them all  :icon_redface:
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wildwood

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Re: Grand Cherokee ZJ 1996 fuel pump
« Reply #4 on: June 26, 2014, 01:15:48 PM »
Nice one James , I'll have words with the BIL , Tis a daily driver for him now since being made redundant so is a bit critical being as we are marooned out here in Deliverance County :icon_twisted:
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JamesH

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Re: Grand Cherokee ZJ 1996 fuel pump
« Reply #5 on: June 26, 2014, 04:01:42 PM »
I don't head over your way much at the moment but I'm not that far away in South Northants if you wanted to get the bike out and collect some stuff - I think I've still got the throttle body you gave me with MAP sensor on too. Or I can post UPS 1-2 day for less than a tenner.

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wildwood

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Re: Grand Cherokee ZJ 1996 fuel pump
« Reply #6 on: June 26, 2014, 04:16:00 PM »
MMMN a bike trip! I'll see what the BIL wants to do and get back to you if I may....
Don't want to go too Banzai helpful  at the mo.....cos  I won't get paid for this :icon_twisted:
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