brianmcc Posted March 17, 2012 Share Posted March 17, 2012 hi guy's i'v got a problem with 1990R/R classic 3.9 efi will start no prob's but after 10-15mins[when at norm-temp ] it stutters and then stop's and wont even try to start again ,checked plugs there ok not wet and good spark ,if i leave motor for 1 hour it will start no prob but then same again have fitted new temp sensor and substitute AFM i have a inline fuel pump fitted from POWERMAX EFI could anyone help thanks Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted March 17, 2012 Share Posted March 17, 2012 Ignition amp on dizzy Quote Link to comment Share on other sites More sharing options...
Quagmire Posted March 17, 2012 Share Posted March 17, 2012 +1 for ignition amp. Quote Link to comment Share on other sites More sharing options...
brianmcc Posted March 17, 2012 Author Share Posted March 17, 2012 sorry guy's for being a bit stupid but what do you mean when you say[" ingnition amp on dizzy"] Quote Link to comment Share on other sites More sharing options...
Quagmire Posted March 17, 2012 Share Posted March 17, 2012 'tis the little black box on the side on the dizzy itself. Will have two or three electrical terminals on it. Quote Link to comment Share on other sites More sharing options...
stuck Posted March 18, 2012 Share Posted March 18, 2012 Where are you? If you post your location some one may have one they can lend you to prove it's the amp. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted March 18, 2012 Share Posted March 18, 2012 ^^^ I might even have one in the shed you can have. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted March 18, 2012 Share Posted March 18, 2012 ^^^ I might even have one in the shed you can have. Yep me too, probably 2 in fact, still attached to dizzys I no longer need Quote Link to comment Share on other sites More sharing options...
fozsug Posted March 18, 2012 Share Posted March 18, 2012 Number 2 on the diagram three pin stc1184 http://www.brit-car.co.uk/search.php?xSearch=stc1184&submit.x=10&submit.y=12&submit=Search Quote Link to comment Share on other sites More sharing options...
brianmcc Posted March 18, 2012 Author Share Posted March 18, 2012 thanks for replies, fitted a dizzy of my offroader [witch was a runner and ok] fitted and tryed motor BUT to no avail, little story time 5 years ago went to billing running on LPG motor would eat starters 3 in all no one knew what it could be but worked fine until motor stopped then would not turn, anyway took motor off the road and its been sitting in garage since then i thought try to find out what it could be causing the EATING OF STARTERS .found inlet manifold loose so went further and found no 4and 5 cylinders were full of water i checked to see if any-other damage was done [eyesite only mind!!] but looked ok so motor been sitting all this time only starting for a few mins until now . started bobtailing motor 1-2 years ago along with a lot of work being done to body work dont know if this put's any light on it but 33 litre tank fitted with return pipe and elec fuel pump is all that's been changed since LPG problem fitted substitute AFM " " ecu " " dizzy " " new coil " " dizzy cap and rot arm HELP Quote Link to comment Share on other sites More sharing options...
p76rangie Posted March 18, 2012 Share Posted March 18, 2012 What type of LPG system do you have on it. Some start on petrol and then switch to LPG once the engine is warm. It could be cutting out when switching to petrol. If you are starting on LPG, it there coolant getting to the convertor. It could be freezing up which is causing it to stop. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted March 18, 2012 Share Posted March 18, 2012 If you are running on petrol, as it sounds like from wet plugs, it could well be your coolant temp sender, you can test the values for this using the diagnostics in the techinical archive on here Quote Link to comment Share on other sites More sharing options...
brianmcc Posted March 18, 2012 Author Share Posted March 18, 2012 sorry guy's forgot to let you know LPG been fitted back into car but not used as tank empty , all connected up but no gas .LPG from tingly tech, but yes it can start from gas as well as petrol but none in system so only using petrol at the moment . could it be somthing to do with pump , as its the only thing that's been changed , it run's all time when engine on but my thought for what it's worth was fuel not pressurized enough or am on the wrong TRACK location is lockerbie south scotland Quote Link to comment Share on other sites More sharing options...
brianmcc Posted March 18, 2012 Author Share Posted March 18, 2012 coolant temp [new] fitted on monday night. LPG is a tingly tech one and is all fitted but not using as no gas in tank and [gas] switch is on petrol could it be somthing to do with petrol evapporation in system doing my head in !! located in lockerbie south scotland brian Quote Link to comment Share on other sites More sharing options...
brianmcc Posted March 18, 2012 Author Share Posted March 18, 2012 new temp sensor fitted monday night and just the same . im lost for what to do next???? Quote Link to comment Share on other sites More sharing options...
brianmcc Posted March 20, 2012 Author Share Posted March 20, 2012 could someone tell me where TUNE RESISTOR can be found and what this does? Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted March 21, 2012 Share Posted March 21, 2012 Tune resistor tells the ECU what flavour vehicle it's in - with/without cats/lambda sensors, UK, EU, US or "Rest of world" spec tune, etc. Only difference it could make that'd matter is if you ran a non-cat tune with cats you might damage them/fail the MOT, likewise if you run a cat tune with no lambda sensors fitted it might get its knickers in a twist. If it's been stood for 5 years all sorts could have gone titsup, fuel pressure regulator stuck, injector(s) stuck open/closed/half-way/blocked, etc. There is a diagnostics guide in the technical archive, might be worth working through that methodically (don't skip steps assuming that bit is OK), gives you all the sensor values etc., if you work through it then come back when you hit a problem or get to the end and it still doesn't work then at least you've covered the basics. Quote Link to comment Share on other sites More sharing options...
p76rangie Posted March 21, 2012 Share Posted March 21, 2012 You LPG system should have one or two relays fitted that switch the signal on or off to the fuel injectors when on LPG. As you are only running on petrol at the moment, try fining the relays and bi-pass them to see if they are faulty and causing an issue or whether the LPG system is switching off the injectors when you don't want it to. Quote Link to comment Share on other sites More sharing options...
brianmcc Posted March 21, 2012 Author Share Posted March 21, 2012 hi guy's thank's very much for your help , i THINK i have found the problem broken wire on fuel temp sensor under rubber cover it's the only thing that i did not check [how stupid am i] was using diagnostics for 3.5 efi and it hasnt got the fuel sensor in there, but heho . could someone tell me the purposs of this sensor so as i can understand the logic in my fault , started engine and it ran for longer and was not as hot [too touch ] as before or as high an idle speed weerd or what!!! Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted March 22, 2012 Share Posted March 22, 2012 The warmer the fuel is the less dense it is, hence you need to squirt more in to get the right size of bang. I'm surprised it makes that much difference to the running really. Quote Link to comment Share on other sites More sharing options...
brianmcc Posted March 22, 2012 Author Share Posted March 22, 2012 thank's fridge/freezer[funny but i repair f/f and appliance's for a living] but anway will be bringing motor out of garage for the firt time in 5 year's to give it a wash so will have it running for a bit longer so here's hoping. will get some pic's and try to upload them for you too see the all NEW bobtail range rover vouge se Quote Link to comment Share on other sites More sharing options...
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