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Its not a function of the software. Its a capability of the actual PCM.
RTT cannot be done on an older PCM without physical mods to the PCM.

Some newer GM PCMs have the capability built in for...

I am formally requesting at least control over idle speed correction via spark for J-bodies (and I suspect other older GM 4 cyls).
I keep running into the same issue on all the "lightened" J's I...

Any fix for everyone else?

I tried to read and modify several Roush cars and while the read and save happened. I got checksum errors and such.
I could not open any of them with HPT.

Ask and yee shall receive...

yes it is, but we need to keep asking to not be forgotten.:pray:

It is not 2 different sensors.

On a NA GM car with a 1bar MAP, the PCM reads the MAP at key up and sets that value as BARO. Then while its running, it will adjust that value by comparing it to the...

For GM, most of the needed info has been posted to the Net for years now.

Since the info is hosted by other companies than HP, PM me for info.

Anyone have any ideas about what the pcm does with a swapped 2bar map with regards to Baro settings?

How is it handled on a factory 'charged car?

Does it have a limit to its correction?

CAn...

move to the OBD1 section and post your PCM part#.

all 96 and 95 2.3 autos (only) used the same PCM.
They are all OBD2
as is everything sold in the US in 96 to current.
They are just a different PCM than 97-up J's used and HP decided there was no...

I'm at 20° by 5k at 7psi with major chamber work to the head.
My NA engine is only running 26° at WOT above 5k.


sidenote - I really wish people would stop referring to knock sensor readings...

I don't know what a MAFT is, but here are my issues with most common tuning methods:

FMU- my ion is returnless fuel and regulated to 65psi in the tank.

Piggy back signal shifting device- my car...

Not sure if I understand what your saying, but a J-body PCM will not function well in a 2.2 Ion. All of the vehicle's communications are on a standard the J PCM is not capable of, and you'll lose the...

What is saying it only goes to 6.8k?

Factory Tach?

Datalog?

The purpose of this post is to get a better understanding of a (probably) useless parameter as most of the tables I've seen have no difference.

That said, what do you think Single Fire Mode or...

I don't know what a "D" FMU is.

Any FMU setup is pretty useless when you have an in-tank regulator set at 65psi and no return lines to plumb anything into.

Who cares about speed limiters?

My issue is that I have an 03 Ion1 sedan (true sleeper) with the redline S/Charger bolted to it's 2.2 and no way at all to fuel it.

Same can be said for us 2003 Ions with the "who knows what" PCM w/manual trans.

No it isn't.

no they arent the same.
Each specific application has a custom modified PCM for its own needs.
The only EEC-V PCMs that are the same will have exactly the same part #.

All the different Ford PCM...

not an easy proposal
1st big issue is crank sensor. Almost all GM 4cyls use a 7 "tooth" crank wheel which I have never seen used by any other manufacturer. The only exception that I know of is the...

i'm still hoping too

Just my opinion here, but I would go with a few ° retarded from the peak "sweet spot".

My reason is that the PCM uses Spark advance changes to make almost instant changes for small load...

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