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1994-1995 5.0 Mustang SN95 Tech Forum

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Unread 11-11-2012   #1 (permalink)
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Default 1995 gt with a 347 stroker..older style block and firing order???

i have 1995 gt with a 347 stroker i bought the car with the motor already in it. it looks like it has the older style firing order and the stock computer is still in it. i have been having a few problems with the motor and i was wondering if this could be the issue. thanks
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Unread 11-11-2012   #2 (permalink)
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It doesn't make a difference how old the block is, the camshaft determines the firing order. What is the firing order of this engine? What computer is the car using?
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Unread 11-11-2012   #3 (permalink)
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Default firing order

alright thanks for the info....1,5,4,2,6,3,7,8, so its a non h.o and the stock computer t4mo i cant find any casting numbers on the block my mechanic mentioned that it may be a mexican block.. im gonna look for the extra casting in the front to see if it is indeed a mexican block. thanks
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Unread 11-11-2012   #4 (permalink)
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never mind.:kooky::kooky:

Last edited by cindys_sn95; 11-11-2012 at 02:10 PM. Reason: waste of time.
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Unread 11-11-2012   #5 (permalink)
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Quote:
Originally Posted by redtx347 View Post
alright thanks for the info....1,5,4,2,6,3,7,8, so its a non h.o
If that is the firing order and it is using a non-HO cam, without a tune/chip (or swapping injector connections) you will have running problems.

Out of curiously, is it a hydraulic roller valvetrain? If it isn't (which I suspect it's not) you could just get an HR cam, hydraulic lifters, and go from there.
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Unread 11-11-2012   #6 (permalink)
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well it has crane roller rockers and a comp cam....
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Unread 11-11-2012   #7 (permalink)
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how did you determine the firing order? do you have the part number on the cam?
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Unread 11-12-2012   #8 (permalink)
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Default ....

thats the way the wires are ran on the distributer... i replaced my wires and tried running them the way there suppose to be ran according to my manual and the car didnt start so i used the older firing order and she cranked right up.... no the cam was already in the car when i bought it
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Unread 11-13-2012   #9 (permalink)
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what injector harness do i need?? ive upgraded to 24lb injectors and maf..
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Unread 11-14-2012   #10 (permalink)
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The stock harness will work fine.
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Unread 11-14-2012   #11 (permalink)
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as long as its a non h.o cam everything should be ok??
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Unread 11-14-2012   #12 (permalink)
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What computer are you using? Has it been tuned (does it have a chip)?i

The injector harness may have to be modified to match the non-HO firing order...
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Unread 11-19-2012   #13 (permalink)
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the stock tm40 and no there currently isnt a chip on it
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Unread 11-20-2012   #14 (permalink)
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If all the fuel injectors are plugged in the stock sequence and the engine is using an non-HO firing order then yes, that is a problem. I have read of (at least) one guy simply switching the injector plugs to correspond to the correct firing order. He said it worked great, and it makes sense, but I don't have first hand experience doing so.
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Unread 11-21-2012   #15 (permalink)
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The injection is working under the assumption that you have the correct firing order. That is definitely a problem.

The proper solution is to swap in a cam with the correct firing order. Either a 302 HO or 351w cam would do that.

The McGyver solution is to rewire the injector harness to the non-HO firing order.
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