1990 turbocoupe swap, no injector pulse
- Thread starter Zephyr130
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Originally yes although 2 owners back it was swapped with an 88 turbocoupe motor and transmission
Ok, but turbo coups were just 4cylinders with a hair dryer, IIRC, I know you had another thread about the wiring, I was following, epic work on that wiring mess but we need a recap on engine trans and year.
The car itself is a 1990 lx notch originally a 4cyl 5 speed car, the engine is out of an 88 turbocoupe 5 speed and the car has been re wired under the hood and dash to run the turbocoupe la2 ecm instead of the stock 1990 2.3L ecm, im still tearing into the wiring especially now with no injector pulse or even any power at them when cranking
evintho
Dirt-Old 20+Year Member
It shouldn't have anything to do with the wiring conversion as there are only 3 or 4 wires that are converted and those have to do with the 2.3 EGR system and the TC Vane Air Meter connector. I would start at the injector harness and work your way back checking wire continuity and connections. If it is an ECU issue, remove the case on the ECU to access the circuit board. You can usually tell if you have burnt capacitors 'cause they will look burnt or melted.
You may want to pick up one of these. It'll definitely make your life easier!
1990 Mustang factory wiring diagram
You may want to pick up one of these. It'll definitely make your life easier!
1990 Mustang factory wiring diagram
evintho
Dirt-Old 20+Year Member
Haynes = garbage! The factory wiring diagram I linked to covers every circuit in your specific car. It shows paths, connectors, colors and even has whole car vacuum diagrams. It's what Ford techs used at the dealerships before it all went digital. The EVTM's are pretty detailed also.
1990 Mustang EVTM
Here's a step-by-step wiring conversion for an '88 LA2/3 into a '90 Mustang.
I did the conversion when I built Thunderstang.
Unfortunately, about 5 years later some clown rearended me and totalled the car.........
However, I was able to pull the motor/trans and dropped it into my '27 roadster so.........Thunderstang lives on!
1990 Mustang EVTM
Here's a step-by-step wiring conversion for an '88 LA2/3 into a '90 Mustang.
I did the conversion when I built Thunderstang.
Unfortunately, about 5 years later some clown rearended me and totalled the car.........
However, I was able to pull the motor/trans and dropped it into my '27 roadster so.........Thunderstang lives on!
Good to know with Haynes not being that great of a wiring manual, im digging in again today, ripping off the cold side of the engine and like you had advised start tracing back injector by injector as it shouldn't be an ecm issue, none of the pathways diodes or anything internally looked damaged meaning its more than likely wiring somewhereHaynes = garbage! The factory wiring diagram I linked to covers every circuit in your specific car. It shows paths, connectors, colors and even has whole car vacuum diagrams. It's what Ford techs used at the dealerships before it all went digital. The EVTM's are pretty detailed also.
1990 Mustang EVTM
Here's a step-by-step wiring conversion for an '88 LA2/3 into a '90 Mustang.
I did the conversion when I built Thunderstang.
Unfortunately, about 5 years later some clown rearended me and totalled the car.........
However, I was able to pull the motor/trans and dropped it into my '27 roadster so.........Thunderstang lives on!
That is a sad way for a fox to die but atleast it lives on through another vehicle, im at a point I may trade this for another running driving foxbody so I'm not picking up on someone else's work in the future, this one is an interesting project but I don't have all the nessesary skills to pick up where it's been left
