Engine 88 mustang gt stalls when put into gear

[Crexun]

So if I crack the computer open and find its damaged that's my culprit? Which I'd then solder the connection as shown in the link and hopefully be in businees?

 

[jrichker]

So if I crack the computer open and find its damaged that's my culprit? Which I'd then solder the connection as shown in the link and hopefully be in businees?

Give it a try, you'll never know until you do.

 

[Crexun]

I'm not sure this is the right computer if I'm being real. The torx bits arent what they are suppose to be more does it look like the other ones I've seen and it doesnt have the tight designation I believe.

 

[Crexun]

I've found one ECU that might match this one but it doesnt look the same. Anyone heard of an EM252S? Theres only an EM252 that ive found sold by standard motor products but it doesnt have the same look at the connector part.

 

[jrichker]

I'm not sure this is the right computer if I'm being real. The torx bits arent what they are suppose to be more does it look like the other ones I've seen and it doesnt have the tight designation I believe.

Computer & interchange information for 5.0 Mustang

Revised 16-Oct-2011 to add O2 sensor harness warnings

The Mass Air computers from 89-93 are interchangeable with a few exceptions. Just be sure you use the MAF & MAF sensor from the same series computer. The auto transmission computers use a different start circuit than the manual computers. You can use an auto trans computer in a 5 speed car with no problems or changes. I have done it in my original 89 Mustang GT, and I know it works OK. I would recommend avoiding using a 5 speed computer in an auto trans car due to the possibility of damaging the computer’ internal signal ground circuitry.

The odd duck is the 93 Cobra computer, labeled X3Z which is internally calibrated for 24 lb injectors. Use the MAF & MAF sensor from the X3Z computer to avoid problems with the computer's internal calibration. Try and avoid the 93 Cobra computer if you can.

Some cautions about O2 Sensor harnesses need to be observed to avoid damage to the computer.
Only run a 5 speed trans O2 harness with an A9L. Do not run an Auto O2 sensor harness with an A9L. Doing so will damage the computer’s internal signal ground.
Only run an Auto trans O2 sensor harness with an A9P in a car that has an Auto trans. Using a 5 speed trans O2 sensor harness with an Auto trans will cause no crank problems.
See http://forums.corral.net/forums/general-mustang-tech/1094179-oxygen-sensor- harnesses-manual-auto-differences-year-differences.html for more O2 sensor wiring harness info
If you have a damaged computer with signal ground problems, See http://www.stangnet.com/mustang-forums/749974-computer-issue.html#post7490537 for Joel5.0’s fix to the computer internal signal ground.

All the following are mass air unless they say Speed Density
8LD - MANUAL 88 5.0L Mustang Mass Air - California
8LF - Auto 88 5.0L Mustang Mass Air- California
8LG - Auto 88 5.0L Mustang Mass Air- California
A9L - 89-93 5.0L Mustang 5-spd Mass Air
A3M - 93 5.0L Mustang 5-spd Mass Air
A3M1 - 93 5.0L Mustang 5-spd Mass Air
X3Z - 93 5.0L Cobra 5-spd Mass Air internally calibrated for 24 lb injector
A9P - 89-93 5.0L Mustang Auto Mass Air
A9S - 88 5.0L Mustang California Mass Air
C3W - 89-93 5.0L Mustang Auto
DA1 - 87 5.0L Mustang 5-spd Speed Density
J4J1 - 94-95 5.0L SVT Cobra 5-spd
T4M0 - 94-95 5.0L GT Vert 5-spd
U4P0 - 94-95 5.0L GT Auto
W4H0 - 94-95 5.0L GT
ZA0 - 95 Cobra R
D9S - 88 Lincoln LSC Speed Density

 

[Crexun]

Alright then I need to get a different computer apparently. Wonder how it ever ran with this one. Isn't even on the list.

 

[Crexun]

I'm not seeing any burnt up connectors on this either but I figured I'd get that second opinion before I send it out to sea and get a new one.

 

[Chris_muchwano]

I have a 1989 Mustang GT 5SPD manual it was the first time I drove the car since I’ve had it when leaving in first gear it just starts buckin and the rpms are doing up to 3k and down to like 500 and it stalls but when leaving in any other gear I goes fine does anyone know what the problem can be?

 

[General karthief]

I have a 1989 Mustang GT 5SPD manual it was the first time I drove the car since I’ve had it when leaving in first gear it just starts buckin and the rpms are doing up to 3k and down to like 500 and it stalls but when leaving in any other gear I goes fine does anyone know what the problem can be?

you have a thread started about problems with your car here: https://www.stangnet.com/mustang-forums/threads/new-to-fox-body-help-needed.907863/post-9152194, stick to it so members can keep up with what you have already done.