EFI Problem..Update, Couple More Issues!

[Viperwolf1]

TPS voltage is 5.07 all the time. Looks like bad TPS. Could 98 be anything else or pretty much ECM is shot?

Replace the TPS first. Then check codes again. I've only seen the 98 code with a bad ECM but get everything else working before replacing it.

 

[BroncoBrummet]

Ok so Im confused, I have a MAF but computer number reads
E6SF-12A650-M1B SFI-SDI, thats a speed density computer correct?

 

[Viperwolf1]

Ok so Im confused, I have a MAF but computer number reads
E6SF-12A650-M1B SFI-SDI, thats a speed density computer correct?

Yes it is. It will work with a later MA harness but injector size could be a problem.

 

[BroncoBrummet]

If I replace the ECM should I get one for the MAF? The engine and harness are out of a 92 MAF

 

[Viperwolf1]

If I replace the ECM should I get one for the MAF?

Depends. What injectors, harness and MAF do you have?

 

[BroncoBrummet]

Depends. What injectors, harness and MAF do you have?

Stock 92 Mustang 5.0 HO on everything.

 

[Viperwolf1]

Get a MAF ECM.

 

[ilovemaui]

A9P or A9L.

 

[BroncoBrummet]

A9P or A9L.

whats the diff? which one should I get?

 

[ilovemaui]

A9P is auto and A9L is manual. Either one will work.

 

[ilovemaui]

I'm sure there are others that would work, but those are the most popular.

 

[Stadblaster]

I had a similar problem diagnosing a bad ecu. Mine had slightly different symptoms. It would start and run fine for about 10 min but as soon as it would turn off or die it would not restart. Basically rig would run long enough to get you to the middle of no where and die. It still had spark, fuel pressure, and injector pulse and would crank for days just not catch until 3 or so hours of cool down. I never found out what exactly was bad with ecu but replaced it and it ran awesome I replaced everything else in the mean time figuring it out. Good luck

 

[BroncoBrummet]

WHen I call parts store they dont show any A9l or A9p they go by the other numbers. Anyone have one to reference #'s?

 

[ilovemaui]

E9ZF-12A65-CA Should get what you want. Basically you want an EEC or ECU from a 1988-1993 Mustange GT 302 HO motor.

Might also show up as E7ZF.

http://www.autozone.com/autozone/pa...gouyZ9gsp8?itemIdentifier=28497_371125_0_2425

 

[BroncoBrummet]

E9ZF-12A65-CA Should get what you want. Basically you want an EEC or ECU from a 1988-1993 Mustange GT 302 HO motor.

Might also show up as E7ZF.

http://www.autozone.com/autozone/pa...gouyZ9gsp8?itemIdentifier=28497_371125_0_2425

Thanks, everything is ordered, no one here had a TPS or an EEC in stock. Tps will be here Friday, EEC next week.

 

[BroncoBrummet]

Runs great now with new ecm an tps. still get codes 21, 41, and 91 will it help to fix?

 

[BroncoBrummet]

Idles and runs really good with new ecm and tps but still getting the codes i posted last. should i button everything up or work on that? I think I need to fix the ECT code but other than that?

 

[Viperwolf1]

Measure ECT resistance with an ohmmeter.

41 an 91 are lean on both sides. Things to look for are vacuum leaks, dirty MAF, O2 sensors hooked up to wrong side connectors.

 

[BroncoBrummet]

Measure ECT resistance with an ohmmeter.

41 an 91 are lean on both sides. Things to look for are vacuum leaks, dirty MAF, O2 sensors hooked up to wrong side connectors.

Ill clean MAF, check O2 sensors and vacuum is good so anything else I should look for?

 

[Viperwolf1]

How's the PCV and crankcase vent system hooked up?