MAF conversion not working
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From: bainbridge, ga
MAF conversion not working
I did a mass air conversion on my 92 ford f150. I have the 95 A9L puter from a stang. It skips and shakes real bad when it shifts to high gear. no power at all. Do I need to get a 94 puter or does it have the same firing order as teh 95. Mine has a firiing order of 15426378. I am trying to find a 94 mass air flow truck eec. F4TF-12A650-AAA is the number. I know that a 95 on up has the HO firing order of 13726548. It runs like it is hitting on 3 cylinders. I did the injector harness changing to sEFI also. Help me fix this problem!!!
Lead Driver
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From: North Texas
Re: MAF conversion not working
Originally posted by CGREENE
I did a mass air conversion on my 92 ford f150. I have the 95 A9L puter from a stang. It skips and shakes real bad when it shifts to high gear. no power at all. Do I need to get a 94 puter or does it have the same firing order as teh 95. Mine has a firiing order of 15426378. I am trying to find a 94 mass air flow truck eec. F4TF-12A650-AAA is the number. I know that a 95 on up has the HO firing order of 13726548. It runs like it is hitting on 3 cylinders. I did the injector harness changing to sEFI also. Help me fix this problem!!!
I did a mass air conversion on my 92 ford f150. I have the 95 A9L puter from a stang. It skips and shakes real bad when it shifts to high gear. no power at all. Do I need to get a 94 puter or does it have the same firing order as teh 95. Mine has a firiing order of 15426378. I am trying to find a 94 mass air flow truck eec. F4TF-12A650-AAA is the number. I know that a 95 on up has the HO firing order of 13726548. It runs like it is hitting on 3 cylinders. I did the injector harness changing to sEFI also. Help me fix this problem!!!
Easiest thing to do is to source out an AOD MAF computer as they work on both AOD and 5 speeds.
Did you make a MAF kit or order the FMS one?
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From: Newport News USA
What trans do ya have? If you have the AOD, than go with what Hit Man said. If ya have the E4OD, than you'll be more wanting to look for a computer out of a stock MAF equipped 5.0L truck with the E4OD. That'll be your only solution that I can think of right now. The E4OD is computer controlled, and needs the right comp for it.
Hit Man, I'm guessing his MAF is home brewed, cuz neither mine (5 spd) nor your kit (AOD) was the A9L/P comps.
Luke
Hit Man, I'm guessing his MAF is home brewed, cuz neither mine (5 spd) nor your kit (AOD) was the A9L/P comps.
Luke
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It skips and shakes real bad when it shifts to high gear. no power at all.
It runs like it is hitting on 3 cylinders.
Can you hear or feel all of your injectors ticking as they fire?
How long has it been since this truck ran correctly, are there other problems?
Please post your findings as you go, this will be interesting and may save others much time in the future.
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From: North Texas
Originally posted by lexluthr69
What trans do ya have? If you have the AOD, than go with what Hit Man said. If ya have the E4OD, than you'll be more wanting to look for a computer out of a stock MAF equipped 5.0L truck with the E4OD. That'll be your only solution that I can think of right now. The E4OD is computer controlled, and needs the right comp for it.
Hit Man, I'm guessing his MAF is home brewed, cuz neither mine (5 spd) nor your kit (AOD) was the A9L/P comps.
Luke
What trans do ya have? If you have the AOD, than go with what Hit Man said. If ya have the E4OD, than you'll be more wanting to look for a computer out of a stock MAF equipped 5.0L truck with the E4OD. That'll be your only solution that I can think of right now. The E4OD is computer controlled, and needs the right comp for it.
Hit Man, I'm guessing his MAF is home brewed, cuz neither mine (5 spd) nor your kit (AOD) was the A9L/P comps.
Luke
Mine came with the C3W1 which is a varation of the A3M1 AOD computers from Mustangs...
Eric
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From: bainbridge, ga
I have the E40D trans. It shakes when it hits high gear. The injectors are hitting correctly they are all firing like the should. The only reason i used the A9L puter is from a post that i got on here a long time ago from a guy that did a maf conversion. I got the MAF meter off a grand marquis, the tubes came new from Ford and the Injector harness was made by a guy at Ford with the EEC connectors to be inserted into the correct pins on the EEC connector.
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From: North Texas
Originally posted by CGREENE
I have the E40D trans. It shakes when it hits high gear. The injectors are hitting correctly they are all firing like the should. The only reason i used the A9L puter is from a post that i got on here a long time ago from a guy that did a maf conversion. I got the MAF meter off a grand marquis, the tubes came new from Ford and the Injector harness was made by a guy at Ford with the EEC connectors to be inserted into the correct pins on the EEC connector.
I have the E40D trans. It shakes when it hits high gear. The injectors are hitting correctly they are all firing like the should. The only reason i used the A9L puter is from a post that i got on here a long time ago from a guy that did a maf conversion. I got the MAF meter off a grand marquis, the tubes came new from Ford and the Injector harness was made by a guy at Ford with the EEC connectors to be inserted into the correct pins on the EEC connector.
Are the injectors you are using the same as the MAF is calibrated to? If you have larger injectors the stock Grand Marquise MAF won't work. I used a '94 351W MAF on my '88 truck.
How's the idle?
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From: bainbridge, ga
The last time it ran right was before I put in the Lunati cam. That is why I had to convert to MAF. It ran ok with the A9L puter in it before I changed the injectors to the SEFI. That is when the problem started.
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From: bainbridge, ga
The stock injectors are what I have. The grand marquis was a 94. I have a 95 EEC and it does the same thing. The firing on a 95 is different from mine and I will have to get a Distributer to change the firing order to it. The 1994 came mass air also. I have the number for the 94 computer and have not found one yet. Here are some #'s. A 94 49-state 5.0 with MAF and E4OD trans is service
part# F4PZ-12A650-AA and the engineering #'s could be F4TF-12A650-AAA or
AAB. I know that when I unplug the MAF nothing changes on the way it idles. The idle is fine with the hit of the cam. when you put in gear and drive is when you can tell it is hitting on 3 or 4 cylinders.
part# F4PZ-12A650-AA and the engineering #'s could be F4TF-12A650-AAA or
AAB. I know that when I unplug the MAF nothing changes on the way it idles. The idle is fine with the hit of the cam. when you put in gear and drive is when you can tell it is hitting on 3 or 4 cylinders.
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From: North Texas
Originally posted by CGREENE
The last time it ran right was before I put in the Lunati cam. That is why I had to convert to MAF. It ran ok with the A9L puter in it before I changed the injectors to the SEFI. That is when the problem started.
The last time it ran right was before I put in the Lunati cam. That is why I had to convert to MAF. It ran ok with the A9L puter in it before I changed the injectors to the SEFI. That is when the problem started.
What are the specs of the cam? Intake/Exhaust dur, int/exh dur, and LSA.
Are you 100% sure you have an E4OD...b/c I am pretty sure as it is computer controller shifts it will not work with out the computer. The E4OD has 20 pan bolts and is a big rectangle with a notch out of the pan. The AOD has 17 I think.
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From: bainbridge, ga
Originally posted by Hit Man X
Okay...was your truck Bank-To-Bank injection before you changed stuff up? Was the firing order the 1-5-4-2-6-3-7-8 with the stock cam?
What are the specs of the cam? Intake/Exhaust dur, int/exh dur, and LSA.
Are you 100% sure you have an E4OD...b/c I am pretty sure as it is computer controller shifts it will not work with out the computer. The E4OD has 20 pan bolts and is a big rectangle with a notch out of the pan. The AOD has 17 I think.
Okay...was your truck Bank-To-Bank injection before you changed stuff up? Was the firing order the 1-5-4-2-6-3-7-8 with the stock cam?
What are the specs of the cam? Intake/Exhaust dur, int/exh dur, and LSA.
Are you 100% sure you have an E4OD...b/c I am pretty sure as it is computer controller shifts it will not work with out the computer. The E4OD has 20 pan bolts and is a big rectangle with a notch out of the pan. The AOD has 17 I think.
The cam was a Lunati 284/488 cam. LSA i think is 110.
Yes I am 100% sure it is E4OD tranny. Had it rebuilt in January of this year by a tranny shop. The A9l puter was suggested cause it is for a manual tranny and should not affect the automatic shifts. It shifts fine it is just that the shaking is from it not hitting correctly witht he firing order.
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From: North Texas
Originally posted by CGREENE
Yes it was Bank-to-Bank injection prior to conversion. The firing order is 1-5-4-2-6-3-7-8 with the stock cam and new cam.
The cam was a Lunati 284/488 cam. LSA i think is 110.
Yes I am 100% sure it is E4OD tranny. Had it rebuilt in January of this year by a tranny shop. The A9l puter was suggested cause it is for a manual tranny and should not affect the automatic shifts. It shifts fine it is just that the shaking is from it not hitting correctly witht he firing order.
Yes it was Bank-to-Bank injection prior to conversion. The firing order is 1-5-4-2-6-3-7-8 with the stock cam and new cam.
The cam was a Lunati 284/488 cam. LSA i think is 110.
Yes I am 100% sure it is E4OD tranny. Had it rebuilt in January of this year by a tranny shop. The A9l puter was suggested cause it is for a manual tranny and should not affect the automatic shifts. It shifts fine it is just that the shaking is from it not hitting correctly witht he firing order.
This may be dumb but...have you changed your firing order to a HO/351W one of the 1-3-7-2-6-5-4-8 yet?
That cam isn't going to be too friendly to the EEC-IV even with the MAF. The narrow 110LSA is 2* too small for the computer to like. It will run fine after getting it tuned but it will still be quirky with idle sugre sometimes and stuff of that nature.
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From: bainbridge, ga
Originally posted by Hit Man X
Hrm...does the E4OD use an independent computer of the EEC-IV to control shifts like the Allison 1000 in the new GM trucks?
This may be dumb but...have you changed your firing order to a HO/351W one of the 1-3-7-2-6-5-4-8 yet?
That cam isn't going to be too friendly to the EEC-IV even with the MAF. The narrow 110LSA is 2* too small for the computer to like. It will run fine after getting it tuned but it will still be quirky with idle sugre sometimes and stuff of that nature.
Hrm...does the E4OD use an independent computer of the EEC-IV to control shifts like the Allison 1000 in the new GM trucks?
This may be dumb but...have you changed your firing order to a HO/351W one of the 1-3-7-2-6-5-4-8 yet?
That cam isn't going to be too friendly to the EEC-IV even with the MAF. The narrow 110LSA is 2* too small for the computer to like. It will run fine after getting it tuned but it will still be quirky with idle sugre sometimes and stuff of that nature.
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From: North Texas
Originally posted by CGREENE
No independent puter. Yes I moved the wires to the 1-3-7-2-6-5-4-8 order and no good. My mechanic said will have to change distributers to use that order. Surged up and down before i changed to maf.
No independent puter. Yes I moved the wires to the 1-3-7-2-6-5-4-8 order and no good. My mechanic said will have to change distributers to use that order. Surged up and down before i changed to maf.
You don't have to change distributors to change the firing order...all you have to do is to move the spark plug wires.
You sure the harness was built correctly?
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From: Concord, NC
That's weird that the A9L will work at all with an E4OD. I swapped an A9L in my truck but it's a 4 speed stick. Double check your timing. You could possibly need to get a maf custom calibrated for your truck. Does it run bad at certain rpm's or just in overdrive in general? I know you said you switched the injector wires, but just to make sure, you switched 3,5 and 4,7 correct? Double check all of the injector order as well. First time I connected my injector harness I got injectors 1 and 2 wiring swapped, and I had a really bad missfire - once I caught the problem it cured the miss.
Last edited by EPNCSU2006; Oct 25, 2003 at 04:07 PM.