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Fairlane pinging when accelerating 

 

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 Post subject: Fairlane pinging when accelerating
Posted: Mon Apr 04, 2011 9:04 pm 
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Age: 53

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Ride: Ford Fairlane

Location: Albany Creek
QLD, Australia

Hi all.
I have 1995 NFII Fairlane, dual fuel. It pings when you put your foot down. I took it into RACQ (as my mechanic has not been able to sort it out) & was told to check/replace knock sensor. Took it to my mechanic who phoned Ford to be advised that these V8s don't have a knock sensor. He adjusted the timing but it's still pinging. he doesn't have any suggestions. Anybody able to help? Maybe advise mechanic who could assist. I live in Albany Creek (Brisbane Northside). Any advice greatly appreciated.
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 Post subject: Re: Fairlane pinging when accelerating
Posted: Tue Apr 05, 2011 12:00 am 
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Service fuel system..
Double check timing and EGR ..Harmonic balancer may have slipped ??
Check catalytic converter condition ??
Replace o2 sensors if they are over 100,000 klrs old..
Could run some water injection to clean combustion chambers...
Check heat range of spark plugs.. Maybe colder set required..

 

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 Post subject: Re: Fairlane pinging when accelerating
Posted: Tue Apr 05, 2011 6:27 am 
Getting Side Ways
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Accurately measure AFR when it pings to determin if it's fuel or spark related and go from there.

 

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 Post subject: Re: Fairlane pinging when accelerating
Posted: Tue Apr 05, 2011 6:38 am 
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Age: 53

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Joined: 5th Mar 2011

Ride: Ford Fairlane

Location: Albany Creek
QLD, Australia

Thanks for the comments guys. XA Falcon, what is AFR?
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 Post subject: Re: Fairlane pinging when accelerating
Posted: Tue Apr 05, 2011 6:05 pm 
Getting Side Ways
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Ride: Lots, all Fords

Location: Hamilton
New Zealand

Air Fuel Ratio

Pinging can be caused by too much spark advance or not enough fuel. You need to ID which one is causing your problem. If AFR > 14 with your foot hard down, it is too lean and this is most likely causing detonation. If AFR < 13.5 with your foot hard down, AFR is OK and timing advance is most likely the cause. In between is a lottery or a bit of both.

If you're lean then start with the fuel system and MAF - it may be under delivering fuel, or under measuring air (common with the bastard AU MAF housing & E-series sensor combo on a stock ecu)

If you're timing is too advanced then start with base timing and balancer outer-ring checks

 

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 Post subject: Re: Fairlane pinging when accelerating
Posted: Tue Apr 05, 2011 6:35 pm 
Getting Side Ways
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Get in on a dyno with an oxy sensor up the tailpipe and go from there, rather than replacing stuff and hoping to fix it.

Listen to xafalcon, good advice.
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 Post subject: Re: Fairlane pinging when accelerating
Posted: Tue Apr 05, 2011 8:37 pm 
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Age: 53

Posts: 3

Joined: 5th Mar 2011

Ride: Ford Fairlane

Location: Albany Creek
QLD, Australia

Thanks for the advice guys.
Can anybody suggest where to take the car to, to get checked? On Brisbane Northside...
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 Post subject: Re: Fairlane pinging when accelerating
Posted: Wed Apr 06, 2011 5:44 pm 
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Throttle body cleaner on the MAF sensor wires, use a cotton bud gently on the sensors. That fixed it up for me a fair while ago.

 

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