LS6427

iTrader: (2)

So, I searched a bunch but can't find an answer.

I want to use the P59 PCM so I can tune using a Flex-Fuel sensor.

Question: Its a 1998 Trans Am......will the P59 PCM work all of my 1998 engine harness sensors, 4L80E thats going in and all of the gauges in my gauge cluster normally?

Thanks.


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MontecarloDrag

iTrader: (3)

Yes but it needs a lot of wiring changes
I have converted several fbodies and vettes to 411 PCM which is mostly the same and works good.
If you are not comfortable doing electrical work and using wiring diagrams, don't even attempt it.

soloman369

iTrader: (13)

It will work with a re-pin. Tach will need a pull up resistor, your fuel gauge won't work will have to get an after market gauge. Also change the O2s to new style white connector they work better. I have a 98 that swapped to a P59 PCM.

LS6427

iTrader: (2)

So the gas gauge will just be dead.....So you mean I would need another gauge wired and mounted somewhere in the car?

How about all the engine sensors (IAC, TPS, IAT, Temp sensor, Crank and Cam sensor, etc.)
Do they all work fine.....

I want to use a Flex-Fuel sensor so I can run any type of fuel without worrying about changing tunes.

I wonder if its easier just to use an 99-02 0411 PCM.

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LS6427

iTrader: (2)

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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MontecarloDrag

iTrader: (3)

Flex fuel works good for 99-02 0411 PCMs too. There are a few flex fuel write-ups here. You only need to read a lot but it's doable.

If I was in your place I'd use a 0411 PCM to have everything work including flex fuel, gas gauge and transmission.

LS6427

iTrader: (2)

Ah-ha.....I did not know the 0411 PCM can be set up for a Flex-Fuel sensor.

Its gonna be a near 1,000 RWHP set up with single turbo around 18-20psi......can the 0411 easily handle that for easy tuning??

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soloman369

iTrader: (13)

Yes 0411 can be used for flex but are limited to 2 bar and flex. But if you're going to go through all the trouble to repin for a 411 might as well do it p59 best PCM you can get and it supports 3 bar and flex which seems to be the best for you if you plan to reach a thousand on a stock computer. Yes you will have to get an aftermarket gas gauge. Even with a 411 you still have to do a segment swap which may or may not work.

soloman369

iTrader: (13)

All the main sensors will still work with a p59 you will have to get one meant for a drive-by cable setup .

LS6427

iTrader: (2)

How much boost does 2 bar support?

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soloman369

iTrader: (13)

Only 15#

subeone

iTrader: (5)

Your fuel gauge will still work with a p59 pcm on a 98.

LS6427

iTrader: (2)

****.............

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LS6427

iTrader: (2)

For sure.....????

Everything else will work normally too....???

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soloman369

iTrader: (13)

He might want to enlighten me on that as well, a segment swap didn't work for me on my P59.

LSxPwrDZ

iTrader: (4)

With the correct programming it'll all work in a 98 car as the factory unit did.

LS6427

iTrader: (2)

Thanks.....thats a relief.

Can you tell me this: I bought a Frost plug-n-play wiring harness so my 4L80E can be operated by my 1998 PCM with just a segment swap in my PCM.

Do you know if that same wiring harness should be used with the P59 PCM to operate my 4L80E? My tuner will be re-pinning my factory harness to work with the P59 PCM.
I asked Steve at Frost and he was not sure and said to leave that up to my tuner to figure out how to make it work with the P59.

And...can the P59 go 3 bar, I want to push 20psi of boost?

Thanks....

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LSxPwrDZ

iTrader: (4)

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.

soloman369

iTrader: (13)

What programming? I tried a segment swap already and re did the values is there something else out there to try?

LSxPwrDZ

iTrader: (4)

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