So my xj6 has a new battery, alternator, fuel pump, fuel filter, spark plugs, and volt regulator. Recently the car stalled on me. I got it back home, then it would start and then die. It seems the pattern lately is that if I leave the car alone all day it will start up and idle fine for about 15 mins then start giving up and die. Then after that it starts up everytime then dies right away. I checked all the air duct work and everything is tightened fine. I checked the fuel pump while the car was running and it makes a loud noise like humming but isn't that normal? It is a Bosch and is brand new. I do although sometimes hear a pop or two coming from the gas tanks when I shut the car off. One day I noticed gas leaking from my hose that connects to the charcoal canister but it hasn't ever done it since. All the meters check out on the dash. Could it be a bad check valve causing too much pressure in the lines and causing a stall. I also get the effect of seeing a gas tank get more gas than what it was actually filled to after filling up and switching tanks a couple times. Could a bad switch in the lines cause a stall somewhere? Im here in Ohio and its pretty cold up here now. Any suggestions or a list of things I should be checking? Thank you

 

Did do the easy checks I mentioned in your other thread, about looking in the gas tank filler necks?

Cheers
DD

 

Info on checking the fuel switching system


Fuel Tank Switchover Checklist, Series III XJ6


Cheers
DD

 

It was dark out and didn't have a light (phone was dead). So I stuck my hear to the gas tank and after shutting it off I can hear liquid being moved around so im assuming it returned fine but I will check tomorrow and look in the tank. Isnt it normal for the fuel pump to make a noise when you open the trunk and listen? Sometimes it will idle fine and then once I put it into gear it will definatly loose some power and even die. By the way this is the 3rd fuel pump I had replaced within 3 months.

 

I did pour 93 v power gas from shell but I doubt that doesn't matter

 

Normal for fuel pump to hum. If it's more like a growl....then you might have a problem.

Repeat fuel pump failures are often caused by contaminated fuel. Pull your fuel filter and empty it into a clean container. What you see will dictate your next steps. I know your filter is new or almost new but if you have rusty fuel it'll start plugging up a new filter right away....and also cause the fuel to make more noise due to the resistance of the clogging.

Bad part is that the pump is *before* the filter...so any rusty/watered down/cruddy goes thru the pump first, and can damage it!

Cheers
DD

 

Right, it doesn't matter. You might well have a fuel problem, but it doesn't have anything to do with the octane rating!

Cheers
DD

 

Ok Doug thank you I will pull a part the fuel filter with your steps and get back at you soon

 

Not quite what Doug meant, I think!!! OK for a known bad filter, but not for one you hope to use!!


Just dump or flush it out backwards, aka backflushing. More than a bit of detritus is not good.


Blow into it. flows or is restricted. some restriction is to be expected.


Carl

 

Hi Doug, I really don't understand my car lol. This morning I went out and started it with no problems. Let it sit idle for about 10 mins and the rpms went a little low like it was giving out for about 5-10 seconds then returned to normal. Was able to drive it around the lot for a minute then got it back to my driveway. Didn't take apart the fuel filter yet, could this be maybe a sign of some bad gas or bad sediments in my gas tanks?

 

Yes, it could

And you need to take the fuel filter apart. Just take it off and empty the gas into a clean jar

Cheers
DD

 

I went through 4 pumps on mine before I actually looked into what was causing it. Tanks were rusted. Shoved a garden hose in them and cleaned them the best I could, put 2 filters before the pump and changed them regularly.

 

o okay did you just take the tanks apart and then cleaned them with the hose? What did you do after, put any special fuel tank cleaner in them?

 

you don't have to remove the tanks to clean them, just remove the drain bolts at the bottom of the tanks, remove the chromed gas filler assembly at the top and stick a garden hose with good pressure in the tank, moving it around, then do it again from the bottom hole up.

let the water drain and dry overnight or more, you can use a garden blower with attachment to really dry them inside, then seal them back, add a can of STP Water Remover, fill the tanks and go driving until you use all the gasoline.

I have two Jags with twin tanks and that is how I clean mine every couple years.

 

It's always a good idea to remove the gas tanks and have them boiled out, stripped of rust and interior epoxy-coated.
They will never rust or leak, never!