Fuel Leak

flyingbrick · May 29, 2009

Recently swaped exhaust manifolds and now i have a fuel leak on my Renix. Fuel seems to be pooling under the vacuum actuator thing at the end of the fuel rail(closest to the grill). Taking a second look though, it looks as if the injector was not all the way in the seat, so i loosened the rail and pushed it in as hard as i could but it didnt get any better. Suggestions?

joe_peters · May 29, 2009

Are those your OEM injectors? The kind with the two-piece body--plastic and metal? If so it is probably the injector body leaking, and will result in a rather spectacular XJ meltdown.

You can replace those injectors with Ford (Bosch) orange-top 19 lb. injectors, found in 3.8 L and larger cars, pickups, and vans. Grab some at the salvage yard.

I highly recommend you don't drive your XJ until it is fixed, that fuel dripping down on the hot exhaust manifold will ruin your day.

blondejoncherokee · May 29, 2009

that thing i believe from your description is the fuel pressure regulator, and also did you check the o ring at the quick disco fitting at the fuel pressure reg and at that injector? also the injectors from what ive read are a 2 peice design and can fail after 20 years if original equipment. for that very reason ive been pricing ford #19 injectors on ebay the last few days

flyingbrick · May 29, 2009

I havent owned my XJ for the life, but i would assume that they are OEM and most likely original. Its not a Horrible leak, it just smells like gas when i open the hood but the warning has been noted and it will see a lot less driving. So there is really no way that it can be that under the compression stroke some fuel is being forced out? Ok next time i hit up a yard, i'll see what they have for me in terms of injectors. Thanks guys

winterbeater · May 29, 2009

Intake valve is closed during compression stroke and injector fires into the intake, not the cylinder, so no it is not being forced out by compression stroke. And please don't be too cavalier with a "little" gas. This needs to be a mandatory immediate repair.

joe_peters · May 29, 2009

winterbeater said:
Intake valve is closed during compression stroke and injector fires into the intake, not the cylinder, so no it is not being forced out by compression stroke. And please don't be too cavalier with a "little" gas. This needs to be a mandatory immediate repair.

x2. Here is a little light reading on the subject at JP Magazine, they burned up one of theirs: http://www.jpmagazine.com/techarticles/engine/154_0811_preventing_jeep_engine_fires/index.html

winterbeater · May 29, 2009

That's a good link. And don't the hood release cables melt pretty quick so you can't open your hood even if you had a fire extinguisher?

flyingbrick · May 29, 2009

is it better to spend the cash and get new ones? or just used ones and replace the o rings? (how much are o rings?)

winterbeater · May 29, 2009

People have gotten super deals on used ones that have even been flushed and tested on ebay. Sorry to ask you to search the forum a little, but I haven't changed mine out yet. Probably info on o rings too (cheap).

flyingbrick · May 29, 2009

this the guy i need?

winterbeater · May 29, 2009

here's one lead: http://www.naxja.org/forum/showthread.php?t=990826&highlight=injectors

joe_peters · May 29, 2009

The best deal would be at a upull salvage yard, some have posted here getting a set of eight for $5-$20.

You can get a set of eight, cleaned, tested, flow matched, off of eBay for under $100 and with new seals with a warranty. The seller I got mine from is lucky7autoinjectors, he ships USPS priority mail, had mine Florida to Oregon in three days.

Fuel Leak

flyingbrick

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joe_peters

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blondejoncherokee

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flyingbrick

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winterbeater

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joe_peters

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flyingbrick

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