Birty Dastards Jeep Club
Tech Forum => Workshop => Topic started by: Tank on March 02, 2011, 12:10:13 AM
-
Are you sitting comfortably? Then i`ll begin.As some of you will know,i had a diesel Landcruiser which i decided to get rid as it had some issues.Thought i got a good deal as with the money i bought another Landcruiser and that F50 as well.Heres where the trouble begins.Went to see the Landcruiser on Saturday.Its a rare 4.0 litre 80 series with LPG fitted.Got it at a steal or so i thought.Picked it up tonight and all was great,flying down the motorway doing 60 towing my van behind.130 miles without a hitch,then almost as soon as i got on the M5 there was like a backfire and then sort of coughing and spluttering.I was on gas at the time,and had put over 50 litres in,but just in case i was running out i switched to petrol,still same,like fuel starvation and back firing.Pulled over onto hard shoulder and car would then rev ok,apart from a bit of a flat spot.Soon as i pulled away it would be hesitant and powerless.Managed to get up to J1 with coaxing,so off the motorway.Pulled into layby and again,would tick over relatively ok and even rev up but as soon as you put it under load it plays up.Rac man came out but was not really able to do anything so just followed me home,coughing and spluttering,back firing and missing at every slightest application of load.He did mention tps but anyone else have any ideas?? Does it on petrol or gas.Any help gratefully received
-
Maybe of some use:
If LPG is backfiring, It could be either plugs/leads worn - you do need LPG compatible plugs/leads as they are under more strain (burns much hotter)
Other common problem is the Lambda sensor. These take a battering due to the hotter running, and don't tend to last that long. This knocks out the fuel delivery and causes the back fire. This would duff up the petrol side of the sytem too.
-
Would be sensible to check/change ignition parts, my XJ has symptoms similar but nowhere near as bad when parts are getting old.
-
Thanks guys,an idea of places to start,keep the ideas coming if you think of something else to try
-
does sound like the sensor side of things to me. what do the plugs look like?
mate had a explorer running on gas, when he did his plugs they were so old the gap had opened up to about 90 thou!
still ran ok tho which surprised me when i saw them!
-
Havnt even looked yet....still too busy sulking and feeling sorry for myself today :010:
-
has the timimg altered ?
-
Is it possible fro the timing to alter by itself just like that Dave???
-
Having said that,if it was timing wouldnt it idle badly too???
-
Another common LPG backfire cause is the wrong air mix. This can be caused by air leaks in the inlet system so check the inlet manifold and tubing for a good seal.
I would firstly get it running on Petrol and worry about LPG afterwards.
Check all pipe work for splits etc, The backfire would of unsettled any number of pipe joints leading to and from the inlet manifold. As im assuming you have a single point system which just chucks LPG in with the air mix going through the Inlet manifold.
If your engine has a MAF sensor or Air flow meter of sorts it could be the cause of ya troubles. Especially as its having troubles on petrol and LPG.
ATB
Mark
Im no expert Tank, just ran an old range rover that had a few teething troubles with.
-
Thats ok Mark i appreciate any help,and yes i think it does have a air flow meter.I will get around to having a look soon i hope,if it stays dry
-
any pics of this truck dood and can you not pull some codes of it i had simaler problem with diese; i had it was crank sensor go fifty miles or so then ran like a bastard
-
Will get some pics up maybe tomorrow as bit dark now.I dont even know if i can get codes from it as its a 1992 truck Kev
-
so was mine rob looked it up on line and found them
-
Oh on your Prado? Will have a look then,cheers Kev
-
Heres some pics
[attachment=1][attachment=2][attachment=3][attachment=4][attachment=5][attachment=6][attachment=7][attachment=8]
-
single point and I would say badly installed for a start. can you drive it at the moment? Would it make it to mine?
-
if he cant drive it he can always bump it on to his shoulder and carry it
-
single point and I would say badly installed for a start. can you drive it at the moment? Would it make it to mine?
I started it up today and it started ok.Dont see no reason why it wouldnt make it as it drives,just struggles on hills and under acceleration etc
-
This would be a ignition problem Toyota is not my bag but the symptom is definitely ignition, leads, coils, pick-up, plug?????
-
best not driving it too far like it is as you run the risk of overheating valves and plugs.
-
yeah, just carry it mate
-
well I am free in the morning if you want me to take a look at it but can't promise I can solve it.
-
but u can hurt him if he cant
-
and if i do fix it you can sit on bd at cheap fest.
-
game on >:D
:hysterical:
-
sounds like a win/win :hysterical:
-
well I am free in the morning if you want me to take a look at it but can't promise I can solve it.
Damn!! Im off down to Essex and then across to collect my Daihatsu tomorrow,bugger and damn!!.Really appreciate the offer though Rob
-
how about sunday? I think I may be free but not 100% sure.
-
I have Josh Sunday but im sure i could sort it out to have mom watch him for me to come over if you find you do have some free time.Just let me know when you know.Cheers Rob
-
Likw Warthog said earlier, don't get hung up on the LPG system - get it running right on petrol first and then look at the LPG system if it isn't running right on LPG. If you can get new plugs, lead, rotor arm, distributor cap for ok money it would be a good place to start from my experience of these issues on my XJ (mostly noticeable on LPG).
-
I have already ordered a set of plugs,and will get some leads,cap etc organised too.As it plays up on both then i am happy to follow along the lines of it being electrical and will eliminate things as i go,so new plugs leads etc,then if same maybe the coil pack and so on.Cheers guys for the input