Need Ford Tech Help! ECU Question.

TweekedGT

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Jul 22, 2004

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Jul 8, 2007

#1

• Jul 8, 2007

• #1

My tuner thinks the ECU on my car is screwed so I need to get a new one. He told me Ford fixed the problem the 96 and 97 computers were having with the 98 models and that I should find a used 98 ECU. I have found one but what do the ECU code numbers mean? if I want to replace my 96 manual tranny computer what do I need to know to buy the 98? I know there are different ECU codes but what is the difference? Can I buy any 98 coded computer to replace mine as long as it is for a manual transmission? Please help guys.

 

K

Kilgore Trout

Fried or Broiled ?

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Mar 30, 2005

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Jul 8, 2007

#2

• Jul 8, 2007

• #2

In the morning Randy and Mike will see this thread and know. It might be helpful to post your current ECU code numbers.

 

TweekedGT

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#3

• Jul 8, 2007

• #3

Ya, I can't get at the passenger side kick panel to get the code off the ECU, got the car on jackstands retapping my belt tensioner (don't ask). I'll have to get it in the moring if Mike or Randy need it. Hope they can help somehow. They usually come through with these types of tech questions.

 

R

Red2000GT

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Jul 8, 2007

#4

• Jul 8, 2007

• #4

The code is also on your passenger side door jam.

 

RandyStinchcomb

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May 25, 2005

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Jul 9, 2007

#5

• Jul 9, 2007

• #5

as I answered in another forum, a 1998 ECM WILL NOT WORK in a 1996 or 1997 GT, total BS whoever told you that.

1998 fuel system is not only different then 1996/97 but is also wired differently in the PCM and harness, it could be done but Major rewiring of the harness would be required and I sea NO gain by doing this. stay wth a 1996/97 GGL4 PCM and you'll be fine

 

TweekedGT

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#6

• Jul 9, 2007

• #6

Thanks Randy, that was my other thread I started in you know where. Does it matter which code then? I thought mine was a GGL3 for some reason with a long FZ#$@% code number or should I just get one that is for a manual tranny?

 

RandyStinchcomb

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Jul 9, 2007

#7

• Jul 9, 2007

• #7

GGL3 was replaced by the latest ECM which is a GGL4 so either is ok to use. if you need the Ford part # of one, lmk and I'll post it up

 

Mike97gt

it doe snot

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Jan 26, 1999

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the people's republic of massachusetts

Jul 9, 2007

#8

• Jul 9, 2007

• #8

YOUR TUNER thinks you should use a 98 PCM... Does this guy work on fords often????? it won't work the 98's have a returnless fuel system.

He must be really confused.

 

TweekedGT

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#9

• Jul 9, 2007

• #9

I thought they only started returnless in the 99+ GT's, that's good to know. So obviously a 98 is out. What i need to know now is what the codes mean. Here is a link to the computer I am going to buy http://mpsautosalvage.com/products/list.cfm?TypeID=70. Does it matter if I buy a different code than the one I have in the car as long as it is a GGL4 for a 5 speed? The reason he thinks the computer is shot is because the load values on my car are really low at WOT compared to what they should be. I am only showing 90% load @ WOT whereas all of the other KB cars he has tuned are showing 120+% load. He thinks we are leaving a lot of power on the table and I do too. There is a gremlin we have been chasing for 2 years and can't find it, this is the last option and he has just came upon another tuner that had the exact same problem with a 96 car as we are having and it was the computer.

 

RandyStinchcomb

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#10

• Jul 9, 2007

• #10

as long as you get a 1996 or 1997 spec 2V manual ECM, you'll be fine. dont worrie about the "tuner" code