Engine My Foxbody 5.0... is... Weird...

AydenTv

Member
Nov 19, 2020
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Alabama
Let Me explain.. 1989 Ford Mustang 5.0 Lx Convertible... Has A9p ECM.. has 5.0 ho mustang stock intake.. Has Mickey Thompson Valve Covers.. Has a Cast Iron Gear on Distribrutor.. Heads are E6 (has S on back) block is a 89 5.0 ho.. Firing order is 15426378... Trans is an aod.. has 1980 mustang written on driveshaft.. has a truck starter.. has prob 16lbs injectors.. they are more grey than orange lol.. has 65mm throttle bottle with a 65mm c and l cold air intake.. injectirs and ecm wiring looks untouched same with salt and pepper shakers... so my question is... why does it run so good... clearly was blown up and replaced with a flat tappet motor possibly from truck.. so any help.. ohh and still has power..
 

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KRUISR

5 Year Member
Apr 16, 2015
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Have you had the intake off to verify they are E6's?
GT40 Engine.jpg
Casing number can be found in lifter valley, look up to underside of head in the area of the ovals. That will verify was casing you are dealing with.
 

Wayne Waldrep

Before I post a pic, do you have one of yours?
15 Year Member
Apr 14, 2003
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He said they had an "S" cast in them so that should be E6s....right? If the block is an 89 HO block and assuming it has HO internals then the firing order is wrong. Should be 13726548..... Unless.... Yeah it could be a different order.
But that's too much assuming...lol.
What's the goal? Or problem other than oddity?
 

AydenTv

Member
Nov 19, 2020
67
2
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Alabama
We’ve been through this before

yes but ive fixed all drivibilty issues.. car runs and drives perfect.. but with the 154 firing order and flat tappet cam.. i know its e6 heads 5.0 ho block from a 89 mustang.. and flat tappet cam because firing order only likes 15426378 along with a 5.0 ho tfi module dont like the car at all.. and my distrubutor has cast iton gear not a steel one.. :