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car not running on gas...ok now it is :) 

 

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 Post subject: car not running on gas...ok now it is :)
Posted: Fri Oct 20, 2006 5:21 pm 
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wasnt sure if this would be a good place to put it but i figured that most ppl read the 6 cylinder forums.

recently, i am having troubles getting my car started on gas, it turns over then starts then dies... i press accellerator..nothing. (i know some ppl start their cars on petrol first but ive never had to do that)

anyway, i thought ill just start on petrol and switch over to gas. so i let the engine warm up and then switched it over to gas, it switches then dies. so then i start up on petrol and then give it a rev, switch it over to gas, revs go down, i press accelrator.. nothing, no response, then the car dies.

im really stumped, cos if i go and try start my car now it will probably work. but i wont to know why it is doing this?
do you guys need any more info?
1995 ef xr6, duel fuel. i recently got a new cam installed but i dont think its related as i remember i had this problem ages before and the problem corrected itself, and also ive had the ecu reset for over a week and i think it should have relearnt everything by now.

any advice/tips would be grateful.

PS - how much would it cost to get injectors cleaned out.

 

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Last edited by theblackone on Fri Oct 20, 2006 6:17 pm, edited 1 time in total.

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Posted: Fri Oct 20, 2006 5:28 pm 
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s**t there are so many possibilities, it sounds like a safety switch / module type problem.
I know on the old setups with a safety switch, if you lost pulse from the coil then it would do exactly what you've described, it would let gas through to start, but if it didn't get a pulse from the coil then it would die out.
Maybe try getting a power tester on the lockoff and get someone to start it and change to LPG, see if it's cutting the power to it when the car dies... If it is then you know 100% it's an electrical problem.
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Posted: Fri Oct 20, 2006 5:42 pm 
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ok where is the lockoff?

 

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Posted: Fri Oct 20, 2006 5:46 pm 
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Mounted either on or near the convertor, there will be 2 lock offs there but both run the same power anyway.
If the light goes out on the tester when the car dies then it's electrical.
It's probably the easiest thing to start with to eliminate anyway.
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Posted: Fri Oct 20, 2006 5:57 pm 
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Where abouts?
i took a video shot of the car trying to start....

 

 

Attachments:
convertor.jpg
convertor.jpg [ 61.75 KiB | Viewed 32 times ]
convertor2.jpg
convertor2.jpg [ 126.38 KiB | Viewed 24 times ]

 

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Posted: Fri Oct 20, 2006 6:00 pm 
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That small black unit with the 2 wires running to it, test the red wire while the car is running and watch it as the car dies to see if it drops power.
There will be another lock off, follow that copper line down to it and if you can test both.
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Posted: Fri Oct 20, 2006 6:01 pm 
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http://members.optushome.com.au/~ryanac ... sStart.MOV

download that if ou have QUICKTIME
dont know hwo to recude the file size

 

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Posted: Fri Oct 20, 2006 6:06 pm 
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i had a similar problem to you a while ago. i ended up putting in a new battery and changing plugs and leads and that fixed it.
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Posted: Fri Oct 20, 2006 6:06 pm 
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walker i love ya! xoxo haha
turns out the wire on top of the 'black unit' was loose (dont know how?)

yay i have gas now woot
now part II of my question
what is the idle screw on my convertor?
the one with the spring or the one above it

 

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Posted: Fri Oct 20, 2006 6:07 pm 
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Sounds as if it's letting gas through to start but then cutting it off.
It could be the convertor too, just thought it would be best to do the easiest test and see where you need to go from there.
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Posted: Fri Oct 20, 2006 6:17 pm 
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thats for helping me diagnose the problem..i didnt know where to look (well i knew it was gas related obviously but wasnt sure where.)

now just need to find out where my idle screw is.
i remember rushed showed me one but i cant remember.

 

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Posted: Fri Oct 20, 2006 6:22 pm 
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It's on the side, there is a course and a fine, fine is the bigger screw with the spring on it.

Did you use a test light to see if it's holding power at the lock off yet?
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Posted: Fri Oct 20, 2006 6:33 pm 
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so they are both idle screws?

1 is course
2 is fine

am i correct? so if i want to adjust idle its those screws there?

where are the screws that u use to adjust air/fuel mixtures?

Walker: the car runs on gas now... the wire was loose. i dont have a test light though

 

 

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Posted: Fri Oct 20, 2006 6:49 pm 
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Well there ya go.
Yeah 2 is fine idle, don't play with the course too much as it does affect the power adjustment aswell.
Screw # 2 in until she starts to drop then slowly turn it out until you just reach a nice idle.
If you don't get any reaction from the fine then do the same with # 1, but only a bit at a time as it's pretty sensitive.
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Posted: Fri Oct 20, 2006 9:35 pm 
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ill have a crack at that later
thanks for all ur help mate!

 

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