Fox T-Bird/Cougar Forums  

"DC" is listed as a 5.0 T-Bird EEC, possibly what you already have now... Make a list of the Stang 'puters so you'll know what you are looking for...

IF the cam was changed to a SO firing order performance type, there is no EEC that would be correct...

http://fordfuelinjection.com/?p=17  T-Bird listings are about three quarters down the page...

are you 100% sure it has an aftermarket cam in it? someone pulled a fast one on you with the injectors, maybe they also didnt put a cam in?

The DC is a Mustang computer...or am I missing something?

DA1    5.0    87 Mustang    SD-SFI / Manual (see note 1)
DB1    5.0    87 Mustang    SD-SFI / Manual
DC    5.0    Mustang    SD-SFI / Auto
DE    5.0    Mustang    SD-SFI / Auto

This is the computer I picked up:

http://cgi.ebay.com/ebaymotors/87-88-MUSTANG-GT-AUTOMATIC-ECU-COMPUTER-PCM-5-0-DC_W0QQcmdZViewItemQQ_trksidZp3286Q2ec0Q2em14QQhashZitem1e57de0190QQitemZ130323186064QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

idk, this is weird. its listed twice. once as a 5.0 bird and again as a mustang. both SD-SFI / Auto. that doesnt make sense

I don't know what NDS means, and I can't even find pin 30 in my EVTM.

Being the 'proud owner' of TWO 3.8's with TBI's, and that silly little reservoir down near the MAP, I'll certify the throttle response issue. I've always noticed a slight lag from throttle change to actual response. (Not that I was expecting something neck breaking, just a response, please). I bought one of the two I have brand new in December '85, and from day dot, it's had that lag. Not a huge lag, but a lag, nonetheless. QUOTE]

Told you a while back what the "Lag" was. 

replace or just delete your fuel injector screens.  problem will go away or dinner is on me.

putting a cam in a speed density car without idle surge and poor driveability.

i just put a b303 in my car with a HO computer and it idles perfect. i guess this is just another thing that makes my car a freak.

http://www.youtube.com/watch?v=UJS_X3r0eWU

Quote from: Old_Paint;292130

Being the 'proud owner' of TWO 3.8's with TBI's, and that silly little reservoir down near the MAP, I'll certify the throttle response issue. I've always noticed a slight lag from throttle change to actual response. (Not that I was expecting something neck breaking, just a response, please). I bought one of the two I have brand new in December '85, and from day dot, it's had that lag. Not a huge lag, but a lag, nonetheless. QUOTE]
 
Told you a while back what the "Lag" was.
 
replace or just delete your fuel injector screens. problem will go away or dinner is on me.

The injector screens were stopped up when the car was brand new? That wouldn't speak very well for quality control at the factory. I did do the screen delete, btw, and it made no difference on the one that falls on it's face after it gets to closed loop temperature. (You owe me a dinner. ) AND, it only seems to do it under light load, i.e. in Drive leaving a light or acclerating from 35 to 45 mph speed zone, etc. NORMAL driving conditions. I've never been able to duplicate the problem in reverse or park when trying to figure out what it might be. The biggest problem I am having is avalibility of active diagnostics equipment when I'm travelling down the road at 30-45 mph. AND, I reiterate a previous objection, if it were clogged injectors, it would be worse at WOT than at light throttle. I have NO technical problem with WOT, only the personal problem of not having two more cylinders out there. At idle, it purrs like a kitten. Until it goes to closed loop, it does not do this. Fouled injectors would create this problem worse under WOT, and the problem would not be mitigated when the engine was cold. If I get on the interstate, and set the cruise on 70, it'll purr all day long between 69 and 73 mph, up and down hills, and NEVER a hesitation. The only thing I can point at there, is an increased air flow across the front of the engine, and this whole time, my problem may be with the dizzy mounted TFI. It is the original TFI on the car from the day I bought it. But by same token, why doesn't it do the same thing when I have it sitting in my driveway after warming it up, and ease down on the throttle?
 
I'm not talking about the severe hesitation problem I have with the blue one in this topic. When the random hesitation doesn't occur with the weird problem, it runs just like the red one. Ever so slight response delay from the time the throttle changes, to the time I can actually feel my intent. BOTH of them do exactly the same thing when I 'blip' the throttle. Not much of anything, other than sound like they're burping the cat. What I hear in the exhaust sounds an awful lot like the TAB or TAD is simply redirecting the air flow from the pump. There is no significant increase in RPM, and yes, I'm mentally compensating for the inertia of the engine and torque converter. This is not a long delay, but noticeable to me. I don't have all the specs for all the components, so doing the math is next to impossible. But, any and every delay due to response of each component and the associated conversions and logic associated with it in the EEC will be spoogeulative. It will never be perfect, but perhaps with super high speed components and a super fast computer, a bit less noticeable. It's old stuff, and was the leading edge of the technology, which has now been rethunk, and better components and computers put in. I can live with that tiny delay I speak of, but that doesn't stop me from noticing it.