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| jellybean |
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Hi everyone i have just bought a 97 fairlane v8 over 200,000 k's on gas mind you doesnt run on petrol for some reason.
Running like a pig managed to pick it up for 1400 body and interior immaculate but motor flat spotted at 3000 rpm was completly guttles after getting it home\ i changing oil oil filter bosch leads for lpg new spark plugs still ran really bad so i got a diagnostic of a mate got error code 172 i reaserched this came up with o2 sensors so replaced these no change i turned the dizzy and the flat spot disaperred but now the idle is horrible surges arround feels like i wants to take off goes right up to rev line but feels very laged like and occasionaly now well very rarely may ping i have a impco mixer gas system get terrible milleage today checking leads i noticed i forgot to plug maf sensor back in started the car plugged this back in made no difference would i be correct in assuming maf is screwed |
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| Vic |
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Fuel filter should be replaced automatically after purchasing a car + consider the condition of the fuel pump.
_________________ 5.6L of carbon footprint. |
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| XR9UTE |
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172 is actually HEGO reading too lean, it doesn't mean the sensor itself is faulty. This is often caused by LPG systems because LPG runs leaner than petrol(approx 15.7:1 vs 14.64:1 for petrol).
Your MAF could still be stuffed as could your injectors. LPG backfires can kill MAF's and, if the injector power is not cut when running on LPG, the injectors will still be operating without fuel and this will kill them. The LPG system should also turn your petrol pump off. Disconnect your battery to zero out the KAM(keep alive memory) and try again before you replace anything else. |
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| jellybean |
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cheers guys replaced fuel pump no good at the moment i think im going to concentrate on just getting it running on the gas as fuel never worked when i bought it and slowly get through all the fuel problems after
so far ill be going to ford pro to get a new maf this week and a new temp sensor |
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| jaysway |
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clean the maf and get a timing light on it for starters
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| sd1800 |
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If the car ran exactly the same as when the MAF was unplugged I would say that's your problem.
_________________ Formerly LV XR5 Turbo, AU Fairmont Ghia V8 & EBII Fairmont I6. |
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| jellybean |
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well changed the maf today ran so much smoother but slowly the miss returned so
gloves are off time for the profesional to take over will update everyone on what the cause of my problem was |
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| sd1800 |
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Does it miss at idle or while on the go?
_________________ Formerly LV XR5 Turbo, AU Fairmont Ghia V8 & EBII Fairmont I6. |
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| jellybean |
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yeah misses on idle badly now decided it would like to rev at 1500rpm thats always fun
but found the problem eventually was a valve problem went to ford pro got 2 heads with this big T marking on them anyone know what this means also having them fully rebuilt at cavalier engine reconditioner's smithfeild so all should be good next thursday just need a master computer reset i think and all should be sweet 
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| jellybean |
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okay iv'e just been researching cam shafts is it a waste of time installing one on my car just thought hey while i got the heads of may aswell do the cam
what would be best suited to the car being stock just freshned up any advice and direction here would be of great appreciation would the au xr8 cam be a good idea or is aftermarket the go |
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| jaysway |
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what do you mean a valve problem?
a cam install is always a good option while you have the motor apart. while your there you might aswell install a new timing cover and water pump. |
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| jellybean |
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i got told by engine tuners that 2 of my valves in the head have cracks as it idel good cold but once warm expands the cracks and is impossible to get to run right so i bought 2 second hand heads and having them serviced then have decided to change cam and not sure at the moment to change to roller rockers everyone telling me to do it but what exactly is required i did a quick search but dont understand
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| jellybean |
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well looking good for this weekend have
cam specs as follow stage 2 camshaft 208 214 @ 50 450 475 lift also more info on the camshaft is dyno tec power will come on strong from 1200 rpm and go through to about 4800 heads redone just bought a j3 chip of jason thanks buddy 3.7 diff gears should hopefully get up better now that it hasnt got fu***d valves to may help lol let you all know how i get on with a few pictures |
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| WindeX |
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The gears will make a big difference, I just picked up a 5.0 with 3.89s in it, the difference between that and stock is amazing, depending in your tyres you can find yourself slipping when taking off at the lights in the wet all too easily.
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