Can the 98 0-90ohm fuel sender be wired direct to the 98 cluster?
10-16-2010, 12:41 PM
#1
Can the 98 0-90ohm fuel sender be wired direct to the 98 cluster? I have a 98 fbody with the stock style 0-90 ohm sender in the fuel tank. I swapped out my 1998 PCM to the AEM EMS for the 99-02 fbody as there isn't one specifically for the 1998 cars. The first thing that we had to do was repin the harness to the 1999-2002 pin out. Unfortunately, there is no way to switch out the segment or calibrate it to make it work. AEM says that it's hard coded. I seem to remember reading somewhere that the 98 fuel sender could be wired directly to the 98 gauge in the cluster. Somehow bypassing the PCM. Could someone tell me what wires I need to grab to make this happen?
10-16-2010, 03:29 PM
#2
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I have a 98 fbody with the stock style 0-90 ohm sender in the fuel tank. I swapped out my 1998 PCM to the AEM EMS for the 99-02 fbody as there isn't one specifically for the 1998 cars. The first thing that we had to do was repin the harness to the 1999-2002 pin out. Unfortunately, there is no way to switch out the segment or calibrate it to make it work. AEM says that it's hard coded. I seem to remember reading somewhere that the 98 fuel sender could be wired directly to the 98 gauge in the cluster. Somehow bypassing the PCM. Could someone tell me what wires I need to grab to make this happen?
10-16-2010, 06:46 PM
#4
I haven't actually done this but looking at the wiring diagrams you should be able to connect the in and out from the pcm to the gauge directly. Either at the pcm red connector pin #36 dark blue wire and pcm blue connector pin #10 purple wire. Or at the C210 connector in the right kick panel pin E to H. Cut the wires and splice together.
10-16-2010, 07:06 PM
#5
I haven't actually done this but looking at the wiring diagrams you should be able to connect the in and out from the pcm to the gauge directly. Either at the pcm red connector pin #36 dark blue wire and pcm blue connector pin #10 purple wire. Or at the C210 connector in the right kick panel pin E to H. Cut the wires and splice together.
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10-20-2010, 08:02 AM
#8
But it's just one wire that has to be tied together? Not 2 going to the gauge that have to tie in to 2 going to the sender?
You didn't read the first post, did you? I am NOT using a stock computer. The aftermarket computer will not allow the segment swap.
You didn't read the first post, did you? I am NOT using a stock computer. The aftermarket computer will not allow the segment swap.
10-21-2010, 03:27 PM
#11
What does the G van have to do with anything? My car is a 98 fbody with 98 cluster and 98 sender in the tank which is 0-90 ohm like the LT1 cars. The only way that it shouldn't work wired direct is if the computer is translating the reading from the sender in the tank to something like a 0-5v signal. We still haven't had a chance to mess with it. Maybe tomorrow.
10-21-2010, 03:51 PM
#12
What does the G van have to do with anything? My car is a 98 fbody with 98 cluster and 98 sender in the tank which is 0-90 ohm like the LT1 cars. The only way that it shouldn't work wired direct is if the computer is translating the reading from the sender in the tank to something like a 0-5v signal. We still haven't had a chance to mess with it. Maybe tomorrow.
10-21-2010, 04:03 PM
#13
TECH Enthusiast
Yea you could bypass the puter and wire it directly. You will need a different gauge than the factory because the 98+ is a 240ohm. You will have to put the key on power to the gauge and the return from the sending unit will be wired directly to the gauge. I have a 98 harness wired to a 411 and I am using a 90ohm sending unit hooked to a Autometer. BTW not everybody knows what a AEM setup is. Most people consider the factory units superior in many ways to the aftermarket setups.
10-21-2010, 04:27 PM
#14
Yea you could bypass the puter and wire it directly. You will need a different gauge than the factory because the 98+ is a 240ohm. You will have to put the key on power to the gauge and the return from the sending unit will be wired directly to the gauge. I have a 98 harness wired to a 411 and I am using a 90ohm sending unit hooked to a Autometer. BTW not everybody knows what a AEM setup is. Most people consider the factory units superior in many ways to the aftermarket setups.
BTW the factory PCM's are FAR SUPERIOR
