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97 nl fairlane running like pig 

 

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 Post subject: 97 nl fairlane running like pig
Posted: Sat Jul 10, 2010 10:50 pm 
Oompa Loompa
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Age: 37

Posts: 28

Joined: 26th Jun 2010

Ride: ford fairlane nl ghia

Location: woodcroft
NSW, Australia

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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 Post subject: Re: 97 nl fairlane running like pig
Posted: Sun Jul 11, 2010 9:46 am 
Getting Side Ways
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Joined: 5th Nov 2004

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Fuel filter should be replaced automatically after purchasing a car + consider the condition of the fuel pump.

 

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 Post subject: Re: 97 nl fairlane running like pig
Posted: Sun Jul 11, 2010 4:15 pm 
EFI Guru
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Age: 49

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Ride: 351 Rangie, '69 390 XR7 Cougar

Location: Perth
WA, Australia

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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 Post subject: Re: 97 nl fairlane running like pig
Posted: Sun Jul 11, 2010 9:03 pm 
Oompa Loompa
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Age: 37

Posts: 28

Joined: 26th Jun 2010

Ride: ford fairlane nl ghia

Location: woodcroft
NSW, Australia

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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 Post subject: Re: 97 nl fairlane running like pig
Posted: Mon Jul 12, 2010 12:44 am 
Getting Side Ways
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Posts: 618

Joined: 21st Nov 2008

Location: Melbourne
VIC, Australia

clean the maf and get a timing light on it for starters

 

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 Post subject: Re: 97 nl fairlane running like pig
Posted: Mon Jul 12, 2010 11:55 am 
Tyre Shredder
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Age: 26

Posts: 355

Joined: 22nd Nov 2007

Ride: 302 Fairmont Ghia

Location: Bexley, Sydney
NSW, Australia

If the car ran exactly the same as when the MAF was unplugged I would say that's your problem.

 

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 Post subject: Re: 97 nl fairlane running like pig
Posted: Wed Jul 14, 2010 10:09 pm 
Oompa Loompa
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Age: 37

Posts: 28

Joined: 26th Jun 2010

Ride: ford fairlane nl ghia

Location: woodcroft
NSW, Australia

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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 Post subject: Re: 97 nl fairlane running like pig
Posted: Thu Jul 15, 2010 4:16 pm 
Tyre Shredder
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Age: 26

Posts: 355

Joined: 22nd Nov 2007

Ride: 302 Fairmont Ghia

Location: Bexley, Sydney
NSW, Australia

Does it miss at idle or while on the go?

 

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 Post subject: Re: 97 nl fairlane running like pig
Posted: Thu Jul 15, 2010 8:26 pm 
Oompa Loompa
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Age: 37

Posts: 28

Joined: 26th Jun 2010

Ride: ford fairlane nl ghia

Location: woodcroft
NSW, Australia

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 :twisted:
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 Post subject: Re: 97 nl fairlane running like pig
Posted: Fri Jul 16, 2010 5:29 pm 
Oompa Loompa
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Age: 37

Posts: 28

Joined: 26th Jun 2010

Ride: ford fairlane nl ghia

Location: woodcroft
NSW, Australia

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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 Post subject: Re: 97 nl fairlane running like pig
Posted: Fri Jul 16, 2010 9:44 pm 
Getting Side Ways
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Posts: 618

Joined: 21st Nov 2008

Location: Melbourne
VIC, Australia

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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 Post subject: Re: 97 nl fairlane running like pig
Posted: Sun Jul 18, 2010 7:10 pm 
Oompa Loompa
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Age: 37

Posts: 28

Joined: 26th Jun 2010

Ride: ford fairlane nl ghia

Location: woodcroft
NSW, Australia

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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 Post subject: Re: 97 nl fairlane running like pig
Posted: Mon Jul 19, 2010 8:53 pm 
Oompa Loompa
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Age: 37

Posts: 28

Joined: 26th Jun 2010

Ride: ford fairlane nl ghia

Location: woodcroft
NSW, Australia

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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 Post subject: Re: 97 nl fairlane running like pig
Posted: Tue Jul 20, 2010 10:10 am 
Stock as a Rock
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Posts: 148

Joined: 23rd May 2006

Ride: NL Fairlane

Location: Melburn!
VIC, Australia

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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