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1998 to 2002 ecm conversion help

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Old 12-03-2017, 11:15 AM   #1  
gearheadib
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Default 1998 to 2002 ecm conversion help

Okay I have converted the ecm in my 1998 to a 2002 ecm with only one problem, the fuel gauge. With the setting for the 1998 fuel system the gauge reads dead empty with a full tank. when I change all fuel system settings to 2002 the gauge works but only reads 3\4 full with a full tank.where do i need to look to get the gauge to work right with the 2002 ecm? I'm tuning with HP tuners.
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Old 12-07-2017, 01:51 PM   #2  
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Okay a tuner in my area told me i need to cut a wire on the secondary tank sending unit but didn't remember which one. has anyone on here done the this before?
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Old 12-07-2017, 02:51 PM   #3  
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Before I started cutting wires I'd try to find a schematic for both and I would find the voltage values each computer is looking for to present to the gauge. Bill Curley would be my go to guy if I were you. Good luck and Merry Christmas!
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Old 12-15-2017, 09:48 AM   #4  
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Does anyone know where i can find wiring schematic's for 1998 and 2002 fuel sending units. I am having no luck on the web finding them.

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Old 12-15-2017, 08:08 PM   #5  
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Quote:
Originally Posted by gearheadib View Post
Does anyone know where i can find wiring schematic's for 1998 and 2002 fuel sending units. I am having no luck on the web finding them.
Here ya go.
Cheers,
Goose
Attached Images
File Type: pdf 1998 fuel level schematic.pdf (210.1 KB, 16 views)
File Type: pdf 2002 Fuel Level Schematic.pdf (186.1 KB, 16 views)
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Old 12-16-2017, 09:21 AM   #6  
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Originally Posted by 69 View Post
Here ya go.
Cheers,
Goose
thank you
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Old 12-17-2017, 06:52 PM   #7  
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Quote:
Originally Posted by gearheadib View Post
Okay a tuner in my area told me i need to cut a wire on the secondary tank sending unit but didn't remember which one. has anyone on here done the this before?
Post 10 maybe what they are referring to:
https://www.corvetteforum.com/forums...-a-98-pcm.html

I found the link to that topic in here:
https://www.corvetteforum.com/forums...orvette-3.html


I google searched the forum using:

0411 ecu 97-98 site:www.corvetteforum.com

It has been done and there are topics out there, digging it up may require getting creative with Google.
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Old 12-19-2017, 02:43 PM   #8  
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Quote:
Originally Posted by 93Polo View Post
Post 10 maybe what they are referring to:
https://www.corvetteforum.com/forums...-a-98-pcm.html

I found the link to that topic in here:
https://www.corvetteforum.com/forums...orvette-3.html


I google searched the forum using:

0411 ecu 97-98 site:www.corvetteforum.com

It has been done and there are topics out there, digging it up may require getting creative with Google.
thank you. I cut the wire at pin "A" on the right sending unit and that was it... works great now.
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Old 12-21-2017, 11:11 AM   #9  
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Originally Posted by gearheadib View Post
thank you. I cut the wire at pin "A" on the right sending unit and that was it... works great now.
More forced induction guys have done the ECU swap. If you need more help you may try starting a topic in the Forced Induction section.
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Old 12-26-2017, 05:27 PM   #10  
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[QUOTE=93Polo;1596224115] More forced induction guys have done the ECU swap. If you need more help you may try starting a topic in the Forced Induction section. [/Q

Thanks for the advice, but i found what i needed right here.
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