Engine backfiring constantly

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02-19-2008, 04:39 PM

TotalEclipseTinting

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Join Date: Jan 2007

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Posts: 37

Engine backfiring constantly

My buddy just swaped engines in his 1989 speed density car and it back fires horribly now. The new setup still uses the speed density system so what are we missing?

02-19-2008, 05:32 PM

TotalEclipseTinting

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Join Date: Jan 2007

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Posts: 37

RE: Engine backfiring constantly

We swaped in a non H.O. motor but changed around the firing order. Could that be the problem?

02-19-2008, 07:38 PM

stangbanger87

3rd Gear Member

Join Date: Dec 2007

Location: buckeyelake ,ohio

Posts: 652

RE: Engine backfiring constantly

recheck the fireing order , or the position of the dizzy , that is all i can think that would be wrong with it .

02-19-2008, 08:34 PM

dimebag

6th Gear Member

Join Date: May 2006

Location: earleville md

Posts: 10,357

RE: Engine backfiring constantly

ok yea that wont work

02-19-2008, 08:55 PM

TotalEclipseTinting

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RE: Engine backfiring constantly

Quote:

ORIGINAL: dimebag

ok yea that wont work

02-19-2008, 11:36 PM

AdderMk2

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RE: Engine backfiring constantly

Quote:

ORIGINAL: TotalEclipseTinting

Quote:

ORIGINAL: dimebag

ok yea that wont work

you cant just expect to swap the spark plug wires and have everything be hunky-dory

the mustang runs a sequential fuel injection system. I'd be willing to bet that its running like crap because 3, 7, 5, and 4, arent being fueled properly