So after roughly 12-13 years I bought another Mustang and I need some help. I bought this 93 Mustang last September and am just getting it on the road now. I replaced the several items because it was running funny with a hesitation between 1400-2000 RPM. I replaced the IAC, EGR, TPS, fuel filter, cap, rotor, plugs, wires, and coil. The MAF was a C&L unit calibrated for 30# injectors and not the stock 19# which are on there so I replaced it with a Pro-M calibrated for 19# injectors. Just small stuff.
Well when I was putting the battery back in I reversed polarity and got a quick spark. Car then would crank but not start. Went through the crank but no start online checklist, checked all the fusible links, swapped out the coil, cap, rotor, stator, and wires with OEM ones, installed new ignition switch, and had no luck. Pulled codes and got just got 11.
My buddy who is a ford mechanic then came over and went through it all, cleaned the new plugs, put everything back together and it started up and ran nice then died. Pulled the spout connector and it started up again. Replaced the TFI module and it worked. Drove it around the neighborhood a few times and no issue.
Got it registered today and came home, let it run for a few minutes then it died again. Pulled the spout and it started fine. Replaced the distributor with a rebuilt OEM one, set timing and it ran fine. Installed the spout in and it ran fine. Took it down the street and it felt good, ran it through the gears, Street is about a mile long. Coming up to a stop sign, I throw in the clutch and it bogged down and lost power. Idling under 500 RPMs. No throttle response pretty much out of nowhere. Pulled the spout and power came back and i coasted back home. Checked codes and got a code 18 which is the spout. Replaced the autozone TFI with a Ford motorcraft one (brand new), didn’t help, car still threw a code 18.
I then checked continuity in the circuits from the TFI connector down to the ECM connector at pin 4 and 36 and both had the correct ohms (I attached the picture below from a stangnet thread). So I swapped out the A3M ECM to a known good A9L. No luck, still throwing a code 18 and the car will only turn on with the spout removed. With it removed it idles and runs fine. TPS is set. Timing is set at 10 degrees. Not sure what it can be. It’s getting fuel, fuel pump runs (I accidentally flooded the engine and had to replace the oil and filter and cleaned off the new plugs), and it’s getting spark.
Motor is a 306 with Edelbrock performer heads, E-Cam, cobra intake, 70mm TB, stock injectors, adjustable fuel pressure regulator, electric fan, CAI, full exhaust, and that’s about it.
Well when I was putting the battery back in I reversed polarity and got a quick spark. Car then would crank but not start. Went through the crank but no start online checklist, checked all the fusible links, swapped out the coil, cap, rotor, stator, and wires with OEM ones, installed new ignition switch, and had no luck. Pulled codes and got just got 11.
My buddy who is a ford mechanic then came over and went through it all, cleaned the new plugs, put everything back together and it started up and ran nice then died. Pulled the spout connector and it started up again. Replaced the TFI module and it worked. Drove it around the neighborhood a few times and no issue.
Got it registered today and came home, let it run for a few minutes then it died again. Pulled the spout and it started fine. Replaced the distributor with a rebuilt OEM one, set timing and it ran fine. Installed the spout in and it ran fine. Took it down the street and it felt good, ran it through the gears, Street is about a mile long. Coming up to a stop sign, I throw in the clutch and it bogged down and lost power. Idling under 500 RPMs. No throttle response pretty much out of nowhere. Pulled the spout and power came back and i coasted back home. Checked codes and got a code 18 which is the spout. Replaced the autozone TFI with a Ford motorcraft one (brand new), didn’t help, car still threw a code 18.
I then checked continuity in the circuits from the TFI connector down to the ECM connector at pin 4 and 36 and both had the correct ohms (I attached the picture below from a stangnet thread). So I swapped out the A3M ECM to a known good A9L. No luck, still throwing a code 18 and the car will only turn on with the spout removed. With it removed it idles and runs fine. TPS is set. Timing is set at 10 degrees. Not sure what it can be. It’s getting fuel, fuel pump runs (I accidentally flooded the engine and had to replace the oil and filter and cleaned off the new plugs), and it’s getting spark.
Motor is a 306 with Edelbrock performer heads, E-Cam, cobra intake, 70mm TB, stock injectors, adjustable fuel pressure regulator, electric fan, CAI, full exhaust, and that’s about it.