Topic: 1995 cherokee auto cutting out on lpg (Read 11027 times)

tonaz · « **on:** March 08, 2011, 09:25:10 PM »

hi everyone.

i have a 1995 cherokee 4.0 with lpg and every now and then it just totally dies when on lpg. it has plenty in the tank but the engine cuts out, then when i fire it up again it's fine. don't think it has ever happened when on petrol.

there is no warning, one second it is fine, the next it's dead and i'm cruising to a halt with no steering or brakes.

anyone any ideas?

cheers, tony.

DarrenR · « **Reply #1 on:** March 09, 2011, 06:18:07 PM »

CPS on the way out

big g · « **Reply #2 on:** March 09, 2011, 06:37:13 PM »

I had this on me Bromc once turned out running too lean.

Opened the tap a bit more and been fine since.

captain cavalier · « **Reply #3 on:** March 09, 2011, 08:27:36 PM »

does it on mine if windy with snorkel or when I am messing and forget to push the breather pipe back on the airbox

tonaz · « **Reply #4 on:** March 10, 2011, 07:45:16 AM »

Quote from: DarrenR on March 09, 2011, 06:18:07 PM

CPS on the way out

excuse my ignorance but what is CPS?

cheers,

tony.

Dutch · « **Reply #5 on:** March 10, 2011, 08:19:46 AM »

I'll have a shot at this (from the technically numpty brigade

)

The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. This information is used by the ECU to control ignition and fuel injection.

and the rest of the blurb can be found : http://en.wikipedia.org/wiki/Crankshaft_position_sensor

gazjeep · « **Reply #6 on:** March 10, 2011, 02:00:17 PM »

Go Dutch

Bulldog67 · « **Reply #7 on:** March 10, 2011, 04:05:29 PM »

Quote from: Dutch on March 10, 2011, 08:19:46 AM

I'll have a shot at this (from the technically numpty brigade )

The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. This information is used by the ECU to control ignition and fuel injection.

and the rest of the blurb can be found : http://en.wikipedia.org/wiki/Crankshaft_position_sensor

Traitor

u may end up bein blackballed

tonaz · « **Reply #8 on:** March 11, 2011, 08:08:28 PM »

cheers for that. how much will this cost to replace?

555tom · « **Reply #9 on:** March 13, 2011, 03:13:10 AM »

If it cuts out on lpg and petrol I'd suggest the cps sensor.

If it's on lpg only at what point does it cut out when your rolling/coasting?

How's your idle?

Could also be down to your rotor, ht leads or plugs.

Speaking from experience as I to own a 1995 single point LPG, and have had similar problems in the last few weeks!

tonaz · « **Reply #10 on:** March 13, 2011, 11:43:50 AM »

Quote from: 555tom on March 13, 2011, 03:13:10 AM

If it cuts out on lpg and petrol I'd suggest the cps sensor.

If it's on lpg only at what point does it cut out when your rolling/coasting?

How's your idle?

Could also be down to your rotor, ht leads or plugs.

Speaking from experience as I to own a 1995 single point LPG, and have had similar problems in the last few weeks!

cheers for that mate it seems to be on lpg when coasting only as i am coming to a stop or going slowly mainly. mine is single point too. i think i will get ht leads and plugs changed and see how it goes. out of interest what sort of mileage do you get? 20 quid gets me about 60 miles on lpg i think.

thanks again,

tony.

it idles fine generally a bit under 1000rpm and doesn't tend to move much either way.

big g · « **Reply #11 on:** March 13, 2011, 12:00:20 PM »

You have a problem if you're only gettin' 60 miles to £20 gas.

I'd expect at least 110 miles to 20 quid.

In fact at those rates it'd be cheaper running on petrol.

tonaz · « **Reply #12 on:** March 13, 2011, 06:02:54 PM »

Quote from: big g on March 13, 2011, 12:00:20 PM

You have a problem if you're only gettin' 60 miles to £20 gas.

I'd expect at least 110 miles to 20 quid.

In fact at those rates it'd be cheaper running on petrol.

exactly! what could be causing this?

555tom · « **Reply #13 on:** March 13, 2011, 06:39:24 PM »

Before I had problems with it cutting out when coasting, and with the old lpg vaporizer, to £35 I got 140 miles this was mostly off road driving aswell. As a quick repair to stop the cutting out I wound the lpg idle screw right out to stop it from stalling,but this has affected the mpg quite badly.

Once the plugs and leads were changed I've wound the screw back in and its been fine ever since.

Also once you've sorted your problem check your oil as if it has been using excessive amounts of lpg your oil will be contaminated...

Oh also there should be a screw on the bottom of your vaporizer to drain the "heavy ends" which is is water that collects in the lpg system.

Hope this helps!

tonaz · « **Reply #14 on:** March 14, 2011, 09:17:01 AM »

Quote from: 555tom on March 13, 2011, 06:39:24 PM

Before I had problems with it cutting out when coasting, and with the old lpg vaporizer, to £35 I got 140 miles this was mostly off road driving aswell. As a quick repair to stop the cutting out I wound the lpg idle screw right out to stop it from stalling,but this has affected the mpg quite badly.

Once the plugs and leads were changed I've wound the screw back in and its been fine ever since.

Also once you've sorted your problem check your oil as if it has been using excessive amounts of lpg your oil will be contaminated...

Oh also there should be a screw on the bottom of your vaporizer to drain the "heavy ends" which is is water that collects in the lpg system.

Hope this helps!

thanks mate that's a big help. did you change the vaporisor as well then? is the filter on the lpg just something you take out, wash and replace?

it seems yours was getting slightly better mpg than mine still! so to summarise, i should: change the spark plugs, h-t leads, drain the "heavy ends", clean the lpg filter and it should run better and get better mpg and as a precaution should do an oil change too?

i'm new to all this so please forgive my ignorance. in your previous post you also mentioned the rotor? i thought this was the brake? what exactly is this? does this need changed too?

thanks again, tony.

Dutch · « **Reply #15 on:** March 14, 2011, 12:05:30 PM »

Quote from: tonaz on March 14, 2011, 09:17:01 AM

In your previous post you also mentioned the rotor? i thought this was the brake? what exactly is this? does this need changed too?

Going out on a limb here.......If this doesn't get me flicked......I don't know what will

[attachment=1]

[attachment=2]

gazjeep · « **Reply #16 on:** March 14, 2011, 02:18:57 PM »

Go Dutch...........Go Dutch...........Go Dutch...........Go Dutch...........

tonaz · « **Reply #17 on:** March 15, 2011, 08:29:30 AM »

cheers, so just to clarify. is the rotor likely to need replaced as well? or shoudl i try the other stuff first and see how it goes? how much is this likely to cost to sort out properly? was hoping to do work myslef but just don't have time at the minute so was going to book it in for friday but wanted a good idea of the likely work needed before i did.

thanks again, tony.

Dutch · « **Reply #18 on:** March 15, 2011, 09:19:24 AM »

Quote from: tonaz on March 15, 2011, 08:29:30 AM

is the rotor likely to need replaced as well?

As per Tom555's earlier suggestion .....YES.

The copper contacts on the rotor can be worn/corroded, hence making a bad contact. No use to replace everything behind it if the source of the spark is fubar.

tonaz · « **Reply #19 on:** March 27, 2011, 05:33:48 PM »

hi. could anyone tell me how i drain the heavy ends water and remove the lpg filter and clean it? is there a guide anywhere? i don't really know what i am looking for. is there just a bolt to remove at the bottom of the cylinder thing? should there be like a release of gas as i am taking it off???

oh and i hae had everything changed and it still cuts out on lpg (plugs, leads, rotor, distributor cap all been changed). what next???

thanks in advance. tony.

tonaz · « **Reply #20 on:** March 29, 2011, 09:56:43 AM »

anyone??? i don't know what to do next? cheers

Dutch · « **Reply #21 on:** March 29, 2011, 12:18:27 PM »

Quote from: tonaz on March 27, 2011, 05:33:48 PM

what next???

Ehmmm.....let me think........

[attachment=1]

[attachment=2]

Nope.....nothing comes to mind

Panic mechanic! · « **Reply #22 on:** March 29, 2011, 01:56:49 PM »

where do you live?

tonaz · « **Reply #23 on:** March 30, 2011, 07:32:04 AM »

Quote from: Panic mechanic! on March 29, 2011, 01:56:49 PM

where do you live?

i live in the north east mate, gateshead/county durham border...

tonaz · « **Reply #24 on:** March 31, 2011, 08:50:18 AM »

could anyone tell me how i drain the heavy ends water and remove the lpg filter and clean it? is there a guide anywhere? i don't really know what i am looking for. is there just a bolt to remove at the bottom of the cylinder thing? should there be like a release of gas as i am taking it off???

Author Topic: 1995 cherokee auto cutting out on lpg (Read 11027 times)

tonaz

big g

captain cavalier

tonaz

tonaz

555tom

tonaz

big g

tonaz

555tom

tonaz

tonaz

tonaz

tonaz

Panic mechanic!

tonaz

tonaz