Differences in the 1998 computer and the newer years
12-12-2010, 12:30 AM
#4
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I am still researching this for my 98 Z28, but I did just purchase a 2000 PCM and harness from a member on here and got it in the mail the other day. There is a bit of tuning required to get the fuel gauge working from what I understand. I hear you can just re-pin the PCM connectors instead of replacing the harness as well.
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04-28-2011, 02:07 AM
#8
He just told you everything you need to do.
Pull old pcm and repin the wires into the connector. plug in newer pcm. done.
...basicly
Everything you hope is probably not gunna get handed to u on a platter. Do a lil searchin and readin. Then do it, ok? lol
Pull old pcm and repin the wires into the connector. plug in newer pcm. done.
...basicly
Everything you hope is probably not gunna get handed to u on a platter. Do a lil searchin and readin. Then do it, ok? lol
04-28-2011, 09:10 AM
#9
its actually very easy, i do these 98 swaps all the time now.
PM me if you need help. Dont use a 99+ engine harness it doesnt have all the wires needed to get the cluster to work.(you can add them but its faster ans easier to just use the 98 harness. You need to really repin your 98 harness to the 99 standard, get a 2002 (0411) pcm get the segment swap, get a 99+ pcm bracket.
Repin, Plug in prepped 2002 pcm, have fun!
PM me if you need help. Dont use a 99+ engine harness it doesnt have all the wires needed to get the cluster to work.(you can add them but its faster ans easier to just use the 98 harness. You need to really repin your 98 harness to the 99 standard, get a 2002 (0411) pcm get the segment swap, get a 99+ pcm bracket.
Repin, Plug in prepped 2002 pcm, have fun!
04-28-2011, 11:38 AM
#10
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Doing the fuel segemnt swap is not the correct way to do it. I can adjust the parameters correctly in the 99+ F-Body calibration to work the 98 F-Body IPC
Contact me if you want it done correctly
Contact me if you want it done correctly
05-03-2011, 06:53 AM
#12
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About 6 to 8 months ago I started to help a guy with a 96 Camaro with a 98 IPC and a 02 PCM. This car also had a custom fuel cell. The PCM was a Dual-Flash and the Tune was done by a Top Shelf Tuner on this site. From my understanding it was supposed to run the fuel gauge. That was the main reason for the tune. I got involved and I emailed a few tunes to the guy and I couldn't get the gauge to work unless the fuel sender resistance was off of the scale. The guy mailed me the sender, PCM, and the IPC. The Dual-Flash board came off in shipping and I had to fix that. It wasn't properly attached. I figured out the sender side very fast. I had the sender properly scaled to read empty to full on the Tech II and it also had the proper amount of fuel displayed on the Tech II at all points. The IPC side was still way off.
This means the PCM wasn't sending out the correct signal. I looked over the fuel segment line by line in WinOLS and found the issue. What I came up with was only 2 parameters needed to be changed in the fuel segment from a 02 F-body to make a 98 IPC work.
You need to turn on PWM fuel gauge
You need to set the Hz frequency on the PWM hard wire to the correct frequency that the IPC uses.
I found that GM uses several different frequencies to drive 99+ gauges and none would properly run the 98 fuel gauge. I had John at Tunercat look at the 98 calibration. He found the frequency and that was the setting I needed. I think the Express Van is around 60.1 Hz and other are all the way up to 512.2 hz
sorry about the
Last edited by CalEditor@PCMCalibrators; 05-03-2011 at 09:18 PM.
06-12-2011, 10:24 AM
#16
Can this be done through HP tuners? Or is there another way? I've been investigating a swap to a newer PCM for my '98.
What I came up with was only 2 parameters needed to be changed in the fuel segment from a 02 F-body to make a 98 IPC work.
You need to turn on PWM fuel gauge
You need to set the Hz frequency on the PWM hard wire to the correct frequency that the IPC uses.
I found that GM uses several different frequencies to drive 99+ gauges and none would properly run the 98 fuel gauge. I had John at Tunercat look at the 98 calibration. He found the frequency and that was the setting I needed. I think the Express Van is around 60.1 Hz and other are all the way up to 512.2 hz
sorry about the
You need to turn on PWM fuel gauge
You need to set the Hz frequency on the PWM hard wire to the correct frequency that the IPC uses.
I found that GM uses several different frequencies to drive 99+ gauges and none would properly run the 98 fuel gauge. I had John at Tunercat look at the 98 calibration. He found the frequency and that was the setting I needed. I think the Express Van is around 60.1 Hz and other are all the way up to 512.2 hz
sorry about the
06-12-2011, 07:30 PM
#18
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https://ls1tech.com/forums/pcm-diagn...uel-gauge.html
