P59 PCM.......does it work all systems normally
If you ran a special patch harness to make it work with a 98 PCM then it's basically setup so that a 60E transmission logic controlled an 80E.
IMO I would ditch that junk and wire the transmission up like it would be in a factory truck/van and then segment swap a true 80E tune into yours so that the control logic is correct entirely and not hacked.
IMO I would ditch that junk and wire the transmission up like it would be in a factory truck/van and then segment swap a true 80E tune into yours so that the control logic is correct entirely and not hacked.
What about my 1998 wiring harness? Would that just get re-pinned to work properly with the P59. Or are you saying use the truck/van entire wiring harness also?
Also, 20psi boost......
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I want to use the newer P59 PCM and my 4L80E. So you're saying set it all up with the truck/van 4L80E transmission wiring?
What about my 1998 wiring harness? Would that just get re-pinned to work properly with the P59. Or are you saying use the truck/van entire wiring harness also?
Also, 20psi boost......
.
What about my 1998 wiring harness? Would that just get re-pinned to work properly with the P59. Or are you saying use the truck/van entire wiring harness also?
Also, 20psi boost......
.
IMO to save yourself the trouble I'd give Bill Hillock a ring over at BPAutomotive and get him to set you up with a custom engine/trans harness setup for the P59 PCM along with it being properly wired for the 80E. You can also have him pre-wire the flex fuel sensor and a GM LS9 MAP sensor plug in place of the stock LS1 plug. This will kill two birds with one stone keeping you from having to re-pin your existing harness and fixing your transmission wiring harness all the while giving you a brand new updated PNP harness.
Plug it all together.......then start the engine and begin the normal tuning process?
This would be awesome. I'll ask him......thanks.
Also...I answered your PM.....this post answered all those questions......
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Last edited by LS6427; Jan 13, 2018 at 08:45 AM.
Awesome James, thanks. So if Bill Hillock does this for me, will I simply remove my wiring harness....install his complete wiring harness and install the wiring for the 4L80E...and install the PCM.
Plug it all together.......then start the engine and begin the normal tuning process?
This would be awesome. I'll ask him......thanks.
Also...I answered your PM.....this post answered all those questions......
.
Plug it all together.......then start the engine and begin the normal tuning process?
This would be awesome. I'll ask him......thanks.
Also...I answered your PM.....this post answered all those questions......
.
He can get you a harness with your additional requirements (Flex Fuel, LS9 MAP) and prewire it correctly for the 80E so that it all plugs right in and ready for your tuner to tune.
Now the P59 I'm sure he can get as well but he generally only does stock flashes on those to get something up and going and leaves any tuning to the tuner.
Yep you can remove your stock 98 harness, 80E adapter harness and PCM and sell those items to recoup some money.
He can get you a harness with your additional requirements (Flex Fuel, LS9 MAP) and prewire it correctly for the 80E so that it all plugs right in and ready for your tuner to tune.
Now the P59 I'm sure he can get as well but he generally only does stock flashes on those to get something up and going and leaves any tuning to the tuner.
He can get you a harness with your additional requirements (Flex Fuel, LS9 MAP) and prewire it correctly for the 80E so that it all plugs right in and ready for your tuner to tune.
Now the P59 I'm sure he can get as well but he generally only does stock flashes on those to get something up and going and leaves any tuning to the tuner.
.
Send me your tune file and I'll see if it's an OS I have the stuff swapped into to make work right for ya.
James@ShorTuning.com
James@ShorTuning.com
For an old school build (holy **** the p59 was new just a few years ago), that PCM can do almost everything. It can do SD with a real VE table, E85 with a content sensor, 4l80 control with a segment swap, lean cruise with the right OS, and it doesn't have any unusual bugs or hiccups like some of the other PCMs.
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I have a P59 in my 2000 f-body. Fuel gauge seems to work correctly, but the tach is slow very slow to respond. If you smack the throttle the tach barley moves. If you rev the engine and hold it, it will come up to the proper RPM after a little bit. Also the oil pressure gauge works its way to 0 after driving for 10-15 minutes.
Any ideas on how to resolve these issues? Think its something in the tune or a wiring change i need to make?
Any ideas on how to resolve these issues? Think its something in the tune or a wiring change i need to make?
Hello I did the 411 pcm with 2002 Tahoe os and everything seem to work only things that don’t is cruise control and asr and air bag light it’s in my 99 camaro ss trying to get everything work out any idea we pin 56 for the sensor. Also my clutch spring broke could that be why my cruise not working
No air bag light for me.
ABS light is on, but that is because i deleted ABS. Others have reported it to work
Tach never needed a pull up resistor. I removed the trans and after i got it back in, it worked how it should.
Every gauge works on the dash and i never moved a wire in the harness. Needed to play with some settings and segments in the PCM to get everything to work.
ABS light is on, but that is because i deleted ABS. Others have reported it to work
Tach never needed a pull up resistor. I removed the trans and after i got it back in, it worked how it should.
Every gauge works on the dash and i never moved a wire in the harness. Needed to play with some settings and segments in the PCM to get everything to work.
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Does this mean the 411 in my 02 formula can hold 2 tunes? Well, at the very least I will be upgrading to a dual tune capable 99-02 0411 PCM......this way I can have a tune for E85 and a tune for 93 octane.
But I'd like to use the P59 for the Flex-Fuel sensor so the tuning is easier.
But man....I don't want to lose my gas gauge.
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But I'd like to use the P59 for the Flex-Fuel sensor so the tuning is easier.
But man....I don't want to lose my gas gauge.
.
Teching In
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From: Zephyrhills, Fl
FYI, for people with 98's, there are 2 different ways to make your stock fuel gauge work independent of your PCM. Look for a 97/98 S10(primarily 4 cylinders). They used a fuel gauge buffer module that will convert your 33-250 ohm sender into a 0-90 ohm gauge signal. Or speedway motors(and I believe dakota digital) make a module that you can program full and empty for both your sender and gauge, and it will convert it over to make whatever sender operate your factory fuel gauge. This problem happens with 98-00 obs truck's, and these work-arounds were found.
Bumping this.
I have a 1998 Pontiac Firebird with a P59 PCM going in to control a LS3 motor. The Firebird originally started its life with a V6. I am having Current Performance build me a custom harness, however; I am concerned about the fuel gauge aspect. Is there any way to keep the fuel gauge working on a 98 F-Body with a P59 PCM?
Keeping this in mind.
I have a 1998 Pontiac Firebird with a P59 PCM going in to control a LS3 motor. The Firebird originally started its life with a V6. I am having Current Performance build me a custom harness, however; I am concerned about the fuel gauge aspect. Is there any way to keep the fuel gauge working on a 98 F-Body with a P59 PCM?
FYI, for people with 98's, there are 2 different ways to make your stock fuel gauge work independent of your PCM. Look for a 97/98 S10(primarily 4 cylinders). They used a fuel gauge buffer module that will convert your 33-250 ohm sender into a 0-90 ohm gauge signal. Or speedway motors(and I believe dakota digital) make a module that you can program full and empty for both your sender and gauge, and it will convert it over to make whatever sender operate your factory fuel gauge. This problem happens with 98-00 obs truck's, and these work-arounds were found.
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There are people above saying that it worked for them.
Those aftermarket devices are just doing in hardware what tuning does in software.
One or two people said that it didn't work after they did a "segment swap" but that's basically just saying the they copied some stuff and they're not sure what. Sometimes that's sufficient, sometimes you have to look at the individual tables. Apparently this requires doing it careful way rather than the easy way.
I had to update the fuel level tables when I changed my 2002 Corvette from a P01 (aka 411) to a P59, because Chevy changed the tank and sensors in 2003. My fuel gauge works just fine.
Those aftermarket devices are just doing in hardware what tuning does in software.
One or two people said that it didn't work after they did a "segment swap" but that's basically just saying the they copied some stuff and they're not sure what. Sometimes that's sufficient, sometimes you have to look at the individual tables. Apparently this requires doing it careful way rather than the easy way.
I had to update the fuel level tables when I changed my 2002 Corvette from a P01 (aka 411) to a P59, because Chevy changed the tank and sensors in 2003. My fuel gauge works just fine.
There are people above saying that it worked for them.
Those aftermarket devices are just doing in hardware what tuning does in software.
One or two people said that it didn't work after they did a "segment swap" but that's basically just saying the they copied some stuff and they're not sure what. Sometimes that's sufficient, sometimes you have to look at the individual tables. Apparently this requires doing it careful way rather than the easy way.
I had to update the fuel level tables when I changed my 2002 Corvette from a P01 (aka 411) to a P59, because Chevy changed the tank and sensors in 2003. My fuel gauge works just fine.
Those aftermarket devices are just doing in hardware what tuning does in software.
One or two people said that it didn't work after they did a "segment swap" but that's basically just saying the they copied some stuff and they're not sure what. Sometimes that's sufficient, sometimes you have to look at the individual tables. Apparently this requires doing it careful way rather than the easy way.
I had to update the fuel level tables when I changed my 2002 Corvette from a P01 (aka 411) to a P59, because Chevy changed the tank and sensors in 2003. My fuel gauge works just fine.
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That's a good question. I skimmed the thread again and the people saying that it works in a 98 are not saying that it works in their own 98. You may have hit upon a nuance that matters...
But then again, if the sensor is wired directly to the dash, then why would it matter that if the PCM gets swapped out?
But then again, if the sensor is wired directly to the dash, then why would it matter that if the PCM gets swapped out?
That's a good question. I skimmed the thread again and the people saying that it works in a 98 are not saying that it works in their own 98. You may have hit upon a nuance that matters...
But then again, if the sensor is wired directly to the dash, then why would it matter that if the PCM gets swapped out?
But then again, if the sensor is wired directly to the dash, then why would it matter that if the PCM gets swapped out?
Since we are on subject, I purchased the following sensors:
- 98 FBody Oil Pressure Sensor
- 98 FBody Coolant Temp Sensor
- 99 - 02 FBody Camshaft Position Sensor
I 'believe' the 98 F-Body Oil Pressure / Coolant Temp Sensor also 'bypass' the PCM natively and are analog, if that's true, would a P59 PCM have an issue operating without the inputs from the Coolant Temp Sensor and Oil Pressure Sensor (throw an MIL?)
Also I didn't really think about this but would a P59 be able to be paired with a T56 Transmission? or is Auto the only way?
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The P59 was used in 2004 Corvettes and plenty of them had manual transmissions. My 2002 has a T56 and a P59 and it's all good.
My car has the oil pressure sensor wired to the dash and NOT the PCM, and no problem with that.
The PCM is definitely going to want a coolant temp sensor signal, there are lot of aspects of the tune that vary with coolant temp. Spark timing, idle speed, idle airflow, startup enrichment... tons of stuff. There are tables in the tune that tell the PCM how to convert the sensor voltage to temperature, so you can adjust that if you need to.
My car has the oil pressure sensor wired to the dash and NOT the PCM, and no problem with that.
The PCM is definitely going to want a coolant temp sensor signal, there are lot of aspects of the tune that vary with coolant temp. Spark timing, idle speed, idle airflow, startup enrichment... tons of stuff. There are tables in the tune that tell the PCM how to convert the sensor voltage to temperature, so you can adjust that if you need to.
The P59 was used in 2004 Corvettes and plenty of them had manual transmissions. My 2002 has a T56 and a P59 and it's all good.
My car has the oil pressure sensor wired to the dash and NOT the PCM, and no problem with that.
The PCM is definitely going to want a coolant temp sensor signal, there are lot of aspects of the tune that vary with coolant temp. Spark timing, idle speed, idle airflow, startup enrichment... tons of stuff. There are tables in the tune that tell the PCM how to convert the sensor voltage to temperature, so you can adjust that if you need to.
My car has the oil pressure sensor wired to the dash and NOT the PCM, and no problem with that.
The PCM is definitely going to want a coolant temp sensor signal, there are lot of aspects of the tune that vary with coolant temp. Spark timing, idle speed, idle airflow, startup enrichment... tons of stuff. There are tables in the tune that tell the PCM how to convert the sensor voltage to temperature, so you can adjust that if you need to.