Ford Muscle Cars Tech Forum banner

1 - 10 of 10 Posts

·
Registered
Joined
·
4,589 Posts
Discussion Starter · #1 ·
My buddy is looking to install a 87 5spd.ECM into his 87 Cougar with auto.

Will this work as a drop in or will there need some wires swapped around? Mustang ECM's work in Cougars?

I never played much with the 5.0L EFI. Owned a 89 once never worked on it.

He was told this will help him with tuning? I dont think he has the mass air conversion either.

Thanks!
 

·
Premium Member
Joined
·
535 Posts
As I understand it (anyone is free to correct me) the 5.0 Mustang auto ECUs had a more aggressive tune namely in the timing curves but since the cougar is not an HO version I believe it will work since the 87' Mustangs didn't have mass air.
 

·
Registered
Joined
·
4,589 Posts
Discussion Starter · #3 ·
Thanks Zeph,

So the 5spd ECU doesnt matter on a auto trans vehicle then?
 

·
Registered
Joined
·
3,692 Posts
If he's got tuning issues now the 87 Puter won't help any. He'll need to go to a 89-up mass air Puter.
 

·
Registered
Joined
·
4,589 Posts
Discussion Starter · #5 ·
On 2006-03-03 19:19, 1 Bad 88 GT wrote:
If he's got tuning issues now the 87 Puter won't help any. He'll need to go to a 89-up mass air Puter.
I keep telling him that!


I swear its like he wants "The Go" but fails to go down the right path.
 

·
Registered
Joined
·
104 Posts
A few years ago I tried a 5spd computer in my 87 Cougar with an automatic and when she warmed up it would stall out,I swapped the auto computer back in and the issue was sloved. I asked around and was told it was due to the 5spd computer not being able to compensate for the sudden drop in rpms when I put the car into gear and the auto could. I also heard it was the exact difference that the 5spd comp. had the more agressive timing and fuel curve. Not suree if someone was blowing smoke or not .
Just my .02

_________________
87 Cougar XR-7 [email protected]

<font size=-1>[ This Message was edited by: cougar on 3/4/06 9:48pm ]</font>

<font size=-1>[ This Message was edited by: cougar on 3/4/06 9:50pm ]</font>
 

·
Registered
Joined
·
104 Posts
Taht was my thoughts also,but everyone I talk to said it was the 5spd or there was no diff in the timing curve or fuel. And try to get a straight answer from Frod about it is impossible in seems.
 

·
Registered
Joined
·
395 Posts
I thought the difference would be whether it is bank fire or sequential fire on the injectors. You might try to find out which your car is before swapping it over.
 

·
Registered
Joined
·
538 Posts
The Mustang computer is for an H.O. engine,the Cougar isn't an H.O.,unless it's been swapped.The H.O. computer won't work with a standard 5.0.The firing order is different .The H.O. has a 351 W firing order.
 
1 - 10 of 10 Posts
Top