Hello V6ers Looking for help with Tuning 3.4l

[rsafanda]

Hello, I am an owner of a 1995 Pontiac Firebird with a 3.4l set-up.I have plans to Modify the engine but am totally confused on when and how to Tune the ecu for my car. I have Pacesetter headers,Flowmaster exhaust,Magnaflow cat,a K&N air flow system....but would like to put a 260h comp cam with heavier springs and things, 1.6 rocker rollers,port and polish the heads and intake....My mechanic can do all the engine work but cant Tune a ecu...I called all around and knowone has the software for Tuning this engine ecu( obd-1.5 ) anyone know how I can get a Tune for this Bird????
Please help

[robertisaar]

for the time being, and the immediate future, the 93-95 F-cars with 3.4s are NOT tuneable with the stock PCM. there are a few cars running around with 1227727s and 1227730s however, bascially making an OBD1.5-OBD1 downgrade.

recently, i've been toying with the idea of using the 16196401 from the 94-95 3.4DOHC W-bodies to retain a more factory feel, but that's mainly for FWD applications.

[rsafanda]

Thanx for the responce.
Do you know of any vehicles with this computer that would work with my wiring or would I have to re-wire the engine Harness also?

[robertisaar]

the 1227727s were pretty much limited to W-bodies and corvettes, while the 1227730 was in damn near anything at certain points in time... the 27 is a watherproofed ECM, while the 30 is not.

i made this a while back, it should give you a good idea of what you can find them for 60V6 applications anyway.

http://60degreev6.com/forum/local_links.php?action=jump&catid=14&id=130

and the biggest issue here is the connectors to the ECMs themself, since the 1.5 ECM used connectors that were fairly unique compared to the earlier and later ECMs.

another problem is that the 94-95 automatic transmission uses a "pressure control solenoid" in place of a vacuum modulator, something the mentioned ECMs were never intended to control. there have been some workarounds suggested, but AFAIK, the only ones that were even tested were just swapping to the 93 trans, and potentially throwing the 93 valvebody in the 94-95 case and using the modulator, but i can't guarantee that. the "fanciest" option was to use a TCM to control the transmission the way the factory intended using either an aftermarket controller, or a PCM from the 91-95 4L80E and 4L60E trucks.

[bszopi]

i made this a while back, it should give you a good idea of what you can find them for 60V6 applications anyway.

http://60degreev6.com/forum/local_li...atid=14&id=130

OT - We need to make that into an article...

Oh, and welcome to the site!

[Superdave]

700R4's don't use a vacuum modulator, it's all ran off the TV cable.

[robertisaar]

well, even easier then!

shows how much i know about RWD 660s.

[95SleeperAcheiva]

not computer related. I just had to say that bird is gorgeous!