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V8 Pinging under load 

 

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 Post subject: V8 Pinging under load
Posted: Wed Jul 06, 2011 10:03 pm 
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Tell me please...

I've only owned my DF for 5 months and the car has very low k's. I haven't driven it all that much and i'm currently on a road trip for work which has highlighted a 'pinging' problem when the car is travelling at 100km and i put my foot down to overtake the transmission kicks down a gear and off we go but she starts to ping as those revs get up to around 4-5,000 and whilst i'm not into driving my car any harder than whats necessary i'd like to know if this is typical of a Ford 5.0L V8 in a 95 DF Series 1 LTD?

Note: I only every fill the tank with priemium 98 percent octane fuel; which i would have thought would help to eliminate this problem, but apparently not.

Any thoughts ????
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 Post subject: Re: V8 Pinging under load
Posted: Wed Jul 06, 2011 10:24 pm 
Getting Side Ways
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LTD_DF wrote:
Tell me please...

I've only owned my DF for 5 months and the car has very low k's. I haven't driven it all that much and i'm currently on a road trip for work which has highlighted a 'pinging' problem when the car is travelling at 100km and i put my foot down to overtake the transmission kicks down a gear and off we go but she starts to ping as those revs get up to around 4-5,000 and whilst i'm not into driving my car any harder than whats necessary i'd like to know if this is typical of a Ford 5.0L V8 in a 95 DF Series 1 LTD?

Note: I only every fill the tank with priemium 98 percent octane fuel; which i would have thought would help to eliminate this problem, but apparently not.

Any thoughts ????

coil break down or timing,how many ks?

 

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 Post subject: Re: V8 Pinging under load
Posted: Wed Jul 06, 2011 10:35 pm 
Parts Gopher
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Just 96,000km's

Brand spanking new NGK spark plugs as part of a major service.

Vehicle has had every service with Ford execpt its most recent one (i.e. mechanically speaking, she's never been neglected....)
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 Post subject: Re: V8 Pinging under load
Posted: Wed Jul 06, 2011 10:40 pm 
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Leads?
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 Post subject: Re: V8 Pinging under load
Posted: Wed Jul 06, 2011 10:44 pm 
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I really didn't think it was leads on account of the fact that she still has power to all cylinders whilst pinging. I back off the gas because i don't want to do any harm to the engine but it feels as though she's got plenty more go in her if i was to excellerate some more. Certainly not misfiring...
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 Post subject: Re: V8 Pinging under load
Posted: Wed Jul 06, 2011 10:55 pm 
Getting Side Ways
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LTD_DF wrote:
I really didn't think it was leads on account of the fact that she still has power to all cylinders whilst pinging. I back off the gas because i don't want to do any harm to the engine but it feels as though she's got plenty more go in her if i was to excellerate some more. Certainly not misfiring...

as its run in -timming,91 or 95,98 is over kill,standing for 5 months the fuel may be off.it may go better when better when you can top up 1\2 a tank.

 

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 Post subject: Re: V8 Pinging under load
Posted: Wed Jul 06, 2011 11:01 pm 
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the fuels mighty fresh.... i've filled her up at a cost of $110.00 a tank 3x in four days.... and each time the tanks been very very low travelling 630-650km per tank on the open road/highway
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 Post subject: Re: V8 Pinging under load
Posted: Wed Jul 06, 2011 11:07 pm 
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adjust timing?

 

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 Post subject: Re: V8 Pinging under load
Posted: Wed Jul 06, 2011 11:13 pm 
Getting Side Ways
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LTD_DF wrote:
the fuels mighty fresh.... i've filled her up at a cost of $110.00 a tank 3x in four days.... and each time the tanks been very very low travelling 630-650km per tank on the open road/highway

check timming,then coil.has the fuel filter been changed at all?could try injector cleaner in the tank,the low ks and age,hard to put a finger on it.

 

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 Post subject: Re: V8 Pinging under load
Posted: Wed Jul 06, 2011 11:29 pm 
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btw it aint normal, I've got a 5.0 NF and never had pinging, but mine is lpg or on petrol ?I only use premium as minimum, only problem I've had is with the harmonic balancer slipping due to rubber middle section giving up.

 

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 Post subject: Re: V8 Pinging under load
Posted: Thu Jul 07, 2011 2:44 pm 
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Krytox wrote:
adjust timing?

+1

 

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 Post subject: Re: V8 Pinging under load
Posted: Thu Jul 07, 2011 5:43 pm 
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mmmmmm

Well yes i guess it has to be a timing issue.

The thing is it doesn't ping unless i push it hard, so that tells me the timing's right except in that instance. But being and EFI (computer controled engine) isn't the timing advanced electronically or is there a vacuum timing advance unit attached to the dizzy that i need to look at?
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 Post subject: Re: V8 Pinging under load
Posted: Thu Jul 07, 2011 6:11 pm 
Getting Side Ways
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Age: 66

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Location: wollongong
NSW, Australia

LTD_DF wrote:
mmmmmm

Well yes i guess it has to be a timing issue.

The thing is it doesn't ping unless i push it hard, so that tells me the timing's right except in that instance. But being and EFI (computer controled engine) isn't the timing advanced electronically or is there a vacuum timing advance unit attached to the dizzy that i need to look at?

base timming and then ecu computer,no vacuum

 

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 Post subject: Re: V8 Pinging under load
Posted: Thu Jul 07, 2011 6:16 pm 
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Thats what i thought...

So do i need to disconnect anything to check the base timing or can i do it at idle with a warm motor and the air-con swithched off?
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 Post subject: Re: V8 Pinging under load
Posted: Thu Jul 07, 2011 8:40 pm 
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Thanks for that Hans.

I went there and finished up here: http://sbftech.com/index.php/topic,7114.0.html

Which gave me all i need to know in order to adjust my engines timing.

I'll have a crack at it this weekend and so if that puts and end to my troubles.

Thank you to all that contributed.
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