Frustrated in Northern Michigan

Johns89blu · Aug 8, 2021

New to this forum, hello from the great lakes,I? have a conundrum, bought a 1989 supposed gt but it has a regular maf 302 in it replaced upper and lower intake gaskets,injectors, ignition module, coil,ignition switch, put a cold air on it,new fuel pump,wires cap rotor plugs, I had it wired the h.o way ran real rough, realizing the throttle body was on drivers side made me wonder if it wasn't a h.o so I wired the plug wires for non h.o it started right up and purred till I turned it off the the issues came it starts up and dies within a couple seconds every time so I thought timing chain replaced that to no avail still same thing starts then quits, could it be a bad e.c.u?I'm baffled any help would be a God send ty in advance

Mustang5L5 · Aug 8, 2021

You really need to ID what it is you have and try and sort out of the parts are compatible. Did it ever run?

02 281 GT · Aug 8, 2021

Check the catch code on the computer for clues as to what vehicle the engine came out of.

If I were to guess, it sounds like it was perhaps a 4-cylinder that was swapped to a V8 with a complete harness swap out of a 1986-1991 Crown Vic/Grand Marquis.

Post up some pictures of what you have.

Johns89blu · Aug 8, 2021

Mustang5L5 said:
You really need to ID what it is you have and try and sort out of the parts are compatible. Did it ever run?

Ran great two times till I shut it off then it wouldn't start and stay running

Johns89blu · Aug 9, 2021

02 281 GT said:
Check the catch code on the computer for clues as to what vehicle the engine came out of.

If I were to guess, it sounds like it was perhaps a 4-cylinder that was swapped to a V8 with a complete harness swap out of a 1986-1991 Crown Vic/Grand Marquis.

Post up some pictures of what you have.

02 281 GT · Aug 10, 2021

Definitely looks like a 5.0 straight out of a Crown Vic that's missing the passenger side accessory brackets. Remove that intake tube and take a look at the throttle body. The Crown Vic/Grand Marquis came with a much smaller throttle body than even the Mustangs had.

Johns89blu · Aug 10, 2021

Ty I'll put some calipers on it asap ,thanks for the help,not alot of forx guys around here

Johns89blu · Aug 10, 2021

Any idea on motor from these casting numbers???

KRUISR · Aug 11, 2021

Check VIN.

Digits 5,6 and 7 will tell you what body style the chassis was born as. It will start with a P4x. Factory GT hatch will be P42.

Digit 8 is engine code. A will be 4 cyl, E will be V8.

For a Foxbody, alternator is on wrong side and intake facing wrong way. Battery has been moved to passenger side too. I would agree with above and likely a Crown Vic engine.

Does look like you have a V8 tach/cluster (4 cyl only goes to 6k).

Mustang5L5 · Aug 11, 2021

Johns89blu said:
Any idea on motor from these casting numbers???

e7te block

8J29 is the block date code. Sept 29, 1988

Mustang5L5 · Aug 11, 2021

I do see orange injectors. Someone tried to make it work. Unfortunately it’s a Frankenstang

7991LXnSHO · Aug 12, 2021

So what is the vin? If it was a factory GT, why not swap the intake when putting the standard 302 in? This is odd.

Johns89blu · Aug 12, 2021

Ty all for the information guys from the casting number I got a 87 truck motor could be mistaken though

Johns89blu · Aug 12, 2021

I put the injectors in,same color as previous and it does have a spider in the lifter valley

Johns89blu · Aug 12, 2021

KRUISR said:
Check VIN.

Digits 5,6 and 7 will tell you what body style the chassis was born as. It will start with a P4x. Factory GT hatch will be P42.

Digit 8 is engine code. A will be 4 cyl, E will be V8.

For a Foxbody, alternator is on wrong side and intake facing wrong way. Battery has been moved to passenger side too. I would agree with above and likely a Crown Vic engine.

Does look like you have a V8 tach/cluster (4 cyl only goes to 6k).

It's a p42 so it's a factory gt hatch, just everything else is cobbled

Bree · Aug 14, 2021

Taht's how Indian Outlaw (my 'stang) acted when the ECU went bad. Couldn't find a new one anywhere and finally took it to AutoZone and had it rebuilt for $200.

Johns89blu · Aug 14, 2021

Bree said:
Taht's how Indian Outlaw (my 'stang) acted when the ECU went bad. Couldn't find a new one anywhere and finally took it to AutoZone and had it rebuilt for $200.

Ty I'm going to give that a try after I test the t.p.s ,much needed information ty very much

slow84lx · Aug 14, 2021

Johns89blu said:
Ty all for the information guys from the casting number I got a 87 truck motor could be mistaken though

F-150's didn't come from the factory with roller cams until 1992, although they were probably roller ready blocks for several years prior.

Johns89blu · Aug 14, 2021

slow84lx said:
F-150's didn't come from the factory with roller cams until 1992, although they were probably roller ready blocks for several years prior.

Well then I don't understand why there is a spider in the valley then?

Johns89blu · Aug 14, 2021

Johns89blu said:
Well then I don't understand why there is a spider in the valley then?

Steel gear on distributor too not cast

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