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| wild-el |
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why is my el xr6 miss firing on gas?? wen i've got her on petrol runs fine but wen she's on gas and im stopped on a set of lights i need to put it back to neutral as it vibrates thru the car in drive..any ideas??
_________________ EL xr6,standard a** au motor,hi-tech headers, 2 1/2inch red back,,Tikky kitted and wingless,Black GT-P's,on ultra lows and still too high |
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
plugs, leads and tune
LPG is incredibly hard on ignition systems, they need to be in good order. And no just because it works on petrol doesn't mean it should work on LPG |
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| wild-el |
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do you think that a head gasket could be the problem aswell? because i've heard they can cause the same issue...
_________________ EL xr6,standard a** au motor,hi-tech headers, 2 1/2inch red back,,Tikky kitted and wingless,Black GT-P's,on ultra lows and still too high |
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| 89.SVO |
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Age: 35 Posts: 3382 Joined: 11th Mar 2008 Ride: EA SVO, AU2, Toyota Crown Location: Bendigo |
try the cheaper things first. like it's been mentioned LPG is hard on ignition systems. take it from me. my eb is on LPG. when i bought it, it ran like s**t. put some LPG plugs in and and new leads. all sweet.
make sure you put lpg plugs in it
_________________ Daily driver: 2010 Toyota Crown hybrid 3.5L V6 hybrid. 254kw. |
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| wild-el |
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should i go standard leads or 10mm??
_________________ EL xr6,standard a** au motor,hi-tech headers, 2 1/2inch red back,,Tikky kitted and wingless,Black GT-P's,on ultra lows and still too high |
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| PoweredByCNG |
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Buy the best leads you can afford and buy LPG-specific plugs with a gap of between 0.7-0.9mm. While you're at it, check the rest of your ignition - distributor etc.
_________________ 2005 VZ Commodore SV6 with OMVL Dream XXI SVI LPG |
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
wild-el wrote: should i go standard leads or 10mm?? get a set of Eagle series 2 eliminators. I had topgun LPG leads but the boots didn't seals around the plugs properly, in wet weather the spark would track down the outside of the plug cause a missfire and common backfiring. I ended up fitting a set of MSD plug boots to them and replaced the terminals at the same time (topgun need to buy a better crimping tool). haven't had any issues since. I've never had good results with Bosch and LPG. |
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| wild-el |
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nahh i definatly think its miss firing because of the head gasket.i did my road worthy today and the mechanic said i've got abit of an oil leak near the head.but im not losing any water.the oil leak is on the inlet side and there's abit of a water stain under neath the extractors side..
_________________ EL xr6,standard a** au motor,hi-tech headers, 2 1/2inch red back,,Tikky kitted and wingless,Black GT-P's,on ultra lows and still too high |
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
so why ask for help?
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| TimmyA |
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tickford_6 wrote: so why ask for help? Yeah? Would love to personally know how a leaking head gasket causes a back fire... Esp if nothing is leaking out... You done a compression test on it to know that the heap gasket is leaking from a cylinder?
_________________ 93 Red ED 5spd Manual Build Thread |
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| wild-el |
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wel tickford_6 im asking myself te same question.i mean if the spark plugs and leads and dizzy arent the problem then i really dont no why the head gasket would cause it...i guess i jut have to get it out of the way too...
_________________ EL xr6,standard a** au motor,hi-tech headers, 2 1/2inch red back,,Tikky kitted and wingless,Black GT-P's,on ultra lows and still too high |
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| TROYMAN |
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wild-el wrote: wel tickford_6 im asking myself te same question.i mean if the spark plugs and leads and dizzy arent the problem then i really dont no why the head gasket would cause it...i guess i jut have to get it out of the way too... have you changed the leads, dizzy cap rotor and plugs at all?? closed the gaps like others have said?? otherwise your just guessing the leads are not the problem! |
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| TimmyA |
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have you checked the timing?
Have you checked the coil with HEI test plug? Have you checked the button and the cap for wear Have you measured the lead resistance? Snow your asking yourself if its the head gasket? wild-el wrote: nahh i definatly think its miss firing because of the head gasket. You sound so sure here though?
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| wild-el |
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well mechanics are telling me if its not electrics then its the head gasket no clue why....and i have signs of a head gasket leak...
_________________ EL xr6,standard a** au motor,hi-tech headers, 2 1/2inch red back,,Tikky kitted and wingless,Black GT-P's,on ultra lows and still too high |
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| TimmyA |
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So you've checked compression to know its bad?
They have checked compression to know its bad? You know its not the electronics how? Could be the LPG computer for all you know? Has it been diagnosed if its possible?
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