justXJthings

It's alive and running!

Was the crank sensor, swapped it out and it's going! Thanks for the feedback all. Hope this helps someone else down the line to diagnose and fix

justXJthings

justXJthings

UPDATE & more troubles


So it's back to stalling out mid driving. Mechanics replaced the CPS & a new battery however multiple times since, the jeep has stuttered and stalled out, long crank or no crank. Leaving it for a while and it turns over, shift into Drive and it stalls immediately.
The gremlins!

Could it be a faulty CPS they've installed?
Something else?

Jeeps on the side of the road once again looking for some help asap

tech

I would start looking at the wiring . you can have it idling and stat pulling and move the under hood wiring and see if it will stall .

justXJthings

Thanks. Any wiring specifically? I have very little knowledge about what to pull and poke.
It might be beyond that step as its looking like it won't even turn over now. Have left it a few hours and still crank with no turn over...

03Marauderman

Wow....How did we get from running a gas tank dry to electrical issues ???...I am knowledgeable, but not an expert as 'lawsoncl' is.....In my 50 + years I learned that there's no such thing as 'mechanic in a can' ...Then there's the saying of: "No time to do it right the first time, but always time to do it over" ...Yeah & sometimes, as in most times, you have to bite the bullet & do an unpleasant job, such as dropping a fuel tank that has gas in it, or siphon it out which is another pain in the butt....You have the full advantage of knowing your problem started after you ran the tank dry....up until this point the Jeep ran fine.....Pull up your big boy pants & drop the tank, clean it & then install a new fuel pump assy....CLEAN IT, The Tank......as in power washing it, blowing tons of air in it to dry it, let it sit in the sun for several days, put a light in it to confirm you have it clean.....Yup all the fun stuff....then install the new fuel pump assy......Thats what I would do........And by the way my experience with crank sensors was that of No Spark.....

justXJthings

Hmm you might be right. The no start/stalling has happend more often after the tank ran dry - but it hasn't been completely clear of it even before then - It did it once or twice in the early days of owning it... Though it's also been a "poor mans prime" to start it up ever since I owned it - turn over, switch off, turn over to prime then starts - indicating fuel pump things.

At the minute the jeep is roadside and not driveable. Would a dodgy fuel pump be causing it to turn over but stall out straight after shifting into drive? It seems to idle okay...
Also wondering if it's a clogged TPS or Throttle body etc?

Thanks for the answer though, it all helps on the road to fixin...

03Marauderman

Personally, I would not tamper with anything under the hood, but I think I'm late in my suggestion...Once you start tampering with sensors & electronics your going to compound your problem, & at the end have a host of malfunctioning issues....In reading you posts I can see your limitations. Although as difficult as it may seem, the fuel pump replacement is the easiest...Focus your efforts on that & try to undo all that wire pulling....Best of luck to you.......

justXJthings

The tank swap will be on the list for sure.
Out of curiosity and to gain knowledge Would it be possible / likely that if this has been happening in one form or another - even before the fuel tank ran dry - that it could be the cam sensor or throttle / vaccum issues?

I suppose I'm looking for an on the road fix that I could do where the jeep is now...

03Marauderman

Again..I'm knowledgeable but not an expert....My opinions & suggestions are 'Old Skoll"....."Spark & Fuel" make an engine run....With no tools at all, & limited knowledge, I would go to the fuel rail on the engine, take off the cap that has a Shrader type valve, push the pin in & see if you get pressure, or a blow back from the gas in the fuel rail....If not, then for sure you don't have fuel reaching the engine...You have to focus on the event that occurred before the breakdown....Also you never mentioned how many miles/kilometers you have on the Jeep, that would lead to a possibility of a failing fuel pump, not that its an absolute...When I get stumped with a problem "lawsoncl" is almost 99% correct in his diagnoses...Either way you will probably have to get towed....Good luck......

justXJthings

So she turned over today. Just as I organised a tow! Of course.
Drove, up n down hills, so a bit of strain and it didn't stall. Turns over and goes even after stopping and turning off.
I'm stumped. What could it be that's making it so temperamental??

Thanks for the input on the way to solutions!

UPDATE// She stalled again. Organising a tow to the mechanics, they seem stumped at what's wrong with it also but they're maybe my best chance as I don't have any tools to get stuck into self diagnosing. I can direct them to check the fuel pump, CPS, Cam sensor etc and hope they can crack it.
For what it's worth some paperwork from previous jobs has these codes recorded:

03Marauderman

Seems like everyone jumped off this tread with the overwhelming consensus pointing to the fuel pump, with potential contamination in the fuel tank....In your receipts I don't see where a simple fuel pump pressure check was addressed...Perhaps the above repairs were the result of a 'check engine light' thus no further diagnoses was performed after the corrections were made & the light went out.....Also your fuel habits could be a contributing factor to strain on the fuel pump...Do you normally run your tank low ? Have you previously run out of gas? If so, overheating the fuel pump could be a factor, along with constantly picking up small amounts of debris in the strainer... Seems like at start & idle its OK, but when you accelerate & put demand on the fuel supply, that is when you get the bucking & stalling from fuel starvation....Not sure of your reluctance to consider the fuel system???

justXJthings

You're right, it seems that I took the mechanic / auto elec pointing at the CPS meant they had ruled out the pump - when I brought it in I did say that was when it started to stall out consistently. I've spoken to them today to get eyes on the pump properly, so let's go in that direction. If they come back and say it's not the pump, or would it be worth changing it out to be safe regardless?

The jeeps at about 200k on the clock, not sure how the previous owner treated it. I don't make a habit of running it low on fuel but it has happened before, and this time in question it was completely dry before the refill. The poor mans prime, having to turn it over a few times to get it started, has always been there so that also says something about the fuel pump...

Thanks for your time on this one, i'm taking it all on board!

03Marauderman

OK...Keep us posted on the progress...Good Luck...