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 Post subject: injectors
Posted: Mon Feb 19, 2007 9:08 pm 
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New cam installed with different firing order. Engine runs fine but was wondering whether somebody could tell me whether injectors pulse on the inlet valve opening using original firing order or pulse continuously.

Do I need to rewire injectors to pulse with the new firing order ?

Sorry if my terminolgy is a** about but you know what I mean.

Thanx
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Posted: Mon Feb 19, 2007 9:15 pm 
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what car and what ecu ,if its a falcon i6 you should have to touch any wiring at all

 

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Posted: Tue Feb 20, 2007 4:41 pm 
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5.0ltr xr8, eecv

Got a led tester now, I will test on weekend.

TurboGhia, How does your I6 ecu know that youve changed firing order?(if you can on the i6, I wouldnt know)

cheers
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Posted: Tue Feb 20, 2007 4:46 pm 
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well i dont think you can change the firing order unless you have a after market management computer like a wolf3d or ems in it ,you shouldnt need to rewire anything when putting in a cam ,i never did and it ran fine

 

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Posted: Tue Feb 20, 2007 5:04 pm 
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[quote="TURBO_GHIA"]well i dont think you can change the firing order unless you have a after market management computer like a wolf3d or ems in it ,you shouldnt need to rewire anything when putting in a cam ,i never did and it ran fine[/quote]

Thats my question I guess. My new cam has a different firing order than the previous. (I dont know how but it does). It runs fine no probs but if the injectors are set to pulse with a certain firing order, than I guess the fuel will pulse and sit in chamber untill inlet valve opens and so on. Not very efficient.

dont mean to get to carried away with the thought of it all.
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 Post subject: Re: injectors
Posted: Tue Feb 20, 2007 11:24 pm 
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mickoxhxr8 wrote:
New cam installed with different firing order. Engine runs fine but was wondering whether somebody could tell me whether injectors pulse on the inlet valve opening using original firing order or pulse continuously.
With the std SEFI, the injector firing order is 1,3,7,2,6,5,4,8. Each injector fires once every 2 crank rotations in std operation - during cranking, they all fire with the PIP - i.e. each fires 4 times per crank revolution.

 

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 Post subject: Re: injectors
Posted: Tue Feb 20, 2007 11:24 pm 
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Double post.

 

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 Post subject: Re: injectors
Posted: Wed Feb 21, 2007 7:39 am 
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[quote="snap0964"][quote="mickoxhxr8"]New cam installed with different firing order. Engine runs fine but was wondering whether somebody could tell me whether injectors pulse on the inlet valve opening using original firing order or pulse continuously.[/quote]With the std SEFI, the injector firing order is 1,3,7,2,6,5,4,8. Each injector fires once every 2 crank rotations in std operation - during cranking, they all fire with the PIP - i.e. each fires 4 times per crank revolution.[/quote]

Thankyou for information and the firing order is the same as the one I have now so all good. However I thought the standard firing order was
1 5 4 2 6 3 7 8, the previous cam must had been wired different.

I dont have crank sensor and coil packs on my 5.0ltr, so is information still relevent?

cheers
mick
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Posted: Wed Feb 21, 2007 9:34 am 
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mickoxhxr8 wrote:
Not very efficient.


I changed cams aswell and my engine builder said it now has 351 firing order,when running it in i was getting around 150k's to the tank,now wondering if i have the same prob with injector pulse sequence aswell,cars getting dynoed at the minute so i soon know if this improves,bloody better.

 

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 Post subject: Re: injectors
Posted: Wed Feb 21, 2007 12:32 pm 
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mickoxhxr8 wrote:
snap0964 wrote:
mickoxhxr8 wrote:
New cam installed with different firing order. Engine runs fine but was wondering whether somebody could tell me whether injectors pulse on the inlet valve opening using original firing order or pulse continuously.
With the std SEFI, the injector firing order is 1,3,7,2,6,5,4,8. Each injector fires once every 2 crank rotations in std operation - during cranking, they all fire with the PIP - i.e. each fires 4 times per crank revolution.


Thankyou for information and the firing order is the same as the one I have now so all good. However I thought the standard firing order was
1 5 4 2 6 3 7 8, the previous cam must had been wired different.

I dont have crank sensor and coil packs on my 5.0ltr, so is information still relevent?

cheers
mick
My info is from the Ford EF manual (V8), so it is relevant. I got the firing order off the PIP diagram, so just confirm that stock is the same. I know on the I6's the firing order is cast on the log manifold (not on the BBM AFAIK), maybe the firing order is also cast on the V8 manifolds.

 

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Posted: Wed Feb 21, 2007 1:03 pm 
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[quote="ixlrate"][quote="mickoxhxr8"]
Not very efficient.
[/quote]

I changed cams aswell and my engine builder said it now has 351 firing order,when running it in i was getting around 150k's to the tank,now wondering if i have the same prob with injector pulse sequence aswell,cars getting dynoed at the minute so i soon know if this improves,bloody better.[/quote]

Maybe run it by him. He should have a good idea whats happening.
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