I have a 1996 ZJ 4L which doesn't like starting in the morning if parked with the nose up my sloping driveway (it takes a bit of churning and may stall initially or idle slow and rough for a few seconds). However, it is fine when parked nose down. Although a 1996 build, I think it may be a 1997 model year vehicle as it does not have the fuel pressure regulator on the fuel rail. However, the build sheet shows a build date of Jan 1996
Now, having checked the workshop manual and parts manual it seems that the fuel pressure regulator and check valve are part of the fuel filter module on the pump in the tank. My guess is that one or both of these are faulty (I need to check the fuel pressure when/if I can get my hands on a suitable gauge). Given that changing it requires dropping the tank, I was wondering of anyone had experience with fitting an external check valve in the output line from the pump or is it better to just bite the bullet and do the job properly?
Thanks in advance
'96 ZJ 4L auto, '95 XJ 4L manual, 2003 Landrover Discovery
In the UK: 1969 MGC GT
i was thinking of doing an external check valve till i read an article, its just a band aid to the bigger problem, the pump still looses fuel and has to turn dry then gets fuel. the better and permanent solution is just getting a new pump assembly. if you try the external check valve it could at some point fail ( split a line ) and cause a worse situation.
i just bite the bullet and forked over for a delphi pump assembly at rock auto, since they where the cheapest, closer to original and faster shipping.
[QUOTE] When the presence of a check engine light is comforting, because you know "everything is as it should be."[/QUOTE]
Personally I'd go with the Bosch 67646 fuel pump module for your 96 since it's OE and Mopar just repackages them selling them for 2-3 times the price. Runs cool and quiet. Real good deal at $120 from a reputable ebay vendor others here have used although shipping would be $50 to Abu Dhabi. Good luck.
Ahh..I see now. Actually they started installing the fuel pressure regulator in the fuel pump module in 95. Kinda surprised a 97-98 fuel pump module with the external filter/regulator on top of the module works on your 96 since the 96 module was specific to that year only. There was also a TSB issued on the 96 pump for overheating problems so maybe somebody just used what was most available over there? Good luck.