I just wanted to announce that I have acquired tuning software to reprogram the mem-cal (chip) for the 94-95 Buick Century and Olds Ciera 3100V6 SFI PCM. This PCM looks almost identical to the 7730 ECM and will mount in the stock Fiero ECM location using the 4-cyl ECM mounting bracket. This PCM does NOT use a MAP sensor, but uses a MAF sensor and digital (3-solenoid) EGR valve found on the 94-95 3100V6 SFI engines. I can also tune this PCM to control the 3400 SFI V6 found in 96-up FWD minivans, Grand Ams, etc; however it may not work with the linear EGR valves found on those newer engines. This PCM is also set up to control a 4T60-E OD transmission.

I have seen a few 3100/3400 swaps running around so this is definately good news for people that have or want to do these swaps. Contact me for more info on programming.

-Ryan

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power corrupts. absolute power corrupts absolutely.

Custom Computer Tuning | Engine Conversions | Turbocharging | www.gmtuners.com

[This message has been edited by Darth Fiero (edited 05-01-2005).]

sweet.

This would have been nice before I removed the 3400 harness and swapped in a 93 Beretta harness. For future reference, can you reprogram the ECM so that you can run a manual transmission with a 97 3400?

quote Originally posted by Steve Normington: This would have been nice before I removed the 3400 harness and swapped in a 93 Beretta harness. For future reference, can you reprogram the ECM so that you can run a manual transmission with a 97 3400?

To be 100% honest, like the 3800 PCM's, there is no switch I can change in this PCM's programming that will tell it you have a manual transmission. However, I have had great success with just disabling all of the trouble codes and auto trans functions in the 3800 computer. The OBDII 3400 harness would not have worked with this computer anyway. In fact, this computer looks and hooks up almost identically like your 93 Beretta ECM with the exception this PCM is true SFI and uses a MAF sensor instead of a MAP sensor. Of course, the Beretta computer does have the manual trans option built into the programming.

Edit: you posted while I was typing.

BTW, Does anyone have the schematics for the 2001 3400 engines? I have a the manual for my electrical system on the GT, I need to see what needs to be added/changed.

Thanks

[This message has been edited by Earl-R (edited 05-02-2005).]

quote Originally posted by Earl-R: You still need to put in a wiring harness to match the PCM pin-out right? OR will the wiring harness in the Fiero work, or not? Can you give few more details? Will it work with the manual trannies, etc. I'm very interested in this. I have my 2001 Alero 3400 engine I really want to get installed. BTW, Does anyone have the schematics for the 2001 3400 engines? I have a the manual for my electrical system on the GT, I need to see what needs to be added/changed. Thanks

You can use your existing Fiero 2.8 wiring harness with this PCM. However, you will need to add wires for the knock sensor, cam and 24x crank sensors, individual wires for the injectors, and wiring for the MAF sensor. Obviously, the 1227730 Beretta ECM would be much less hassle to use with the stock Fiero 2.8 harness, however, you would not have SFI.

You will need engine computer wiring diagrams and pinouts for the computer system you are going to be using. While I don't have these for the 2001 3400 powered vehicles, I do have many diagrams and pinouts you can download for free on my website: www.gmtuners.com

Engines are not my strong suit. What is meant by SFI? Sequential Fuel Injection? So if I use the ECM your talking about with the Beretta harness , then I would have a true SFI working engine. If I use your ECM do you have the wiring schematics to adapt it for the Fiero? If not, I can contact x-thumper-x.

I can do all the mechanical stuff, and electrial if I have the diagrams, it's just I've haven't done this before with this new of a engine, so I'm a little nervious about doing it. Maybe thats why I haven't done it yet. I haven't swapped out a motor in 20+ years, pre-computer.

The next question I have concerns Turbos. On the 60 degree V6 forum a couple of guys did turbos on stock 3400 engines. They haven't had any problem with them so far running 5 PSI boost. Can you program a chip to run a turbo on a 3400 engine? My thought is to install the 3400 and get it running w/o the turbo first to make sure everthing is in good working order, then add it afterwards. This engine only has 17K on the clock, so it's relatively new.

Thanks,

Earl

quote Originally posted by Earl-R: Are the 3100 PCM's different between Buick, Olds and Chevy? Do you have a part number for this PCM? Edit: Will a 95 Buick Skylark PCM work?

No, the ONLY 3100SFI PCM I have programming for was used ONLY in the 94-95 Buick Century and 94-95 Olds Cutlass Ciera. Ones from other vehicles (even with the same engine) are different and I cannot tune those. The Service Number (p/n) for the PCM I can tune is 16196387.

Darth,

Thank you for the info. The wiring is no real problem, but since I am going to go turbo on this engine, I guess the wisdom is use the Beretta ECM so I can use the 2 bar sensor. I've heard that before somewhere.

If I understand you correctly then, the program I will need is the Grand Prix Turbo program. I see on your website that you do the programming for the 1227730 ECM's for the V8's, and you do the 90-91 Pontiac Grand Prix 3.1L Turbo program I need for my 3400 with the same ECM? After I get it installed I can ship the car up to you for tweeking on a dyno.

I know it sounds like maybe your repeating yourself, your the expert here not me, so please be patient, I just need to make sure I understand.

quote Originally posted by Earl-R: Darth, Thank you for the info. The wiring is no real problem, but since I am going to go turbo on this engine, I guess the wisdom is use the Beretta ECM so I can use the 2 bar sensor. I've heard that before somewhere. If I understand you correctly then, the program I will need is the Grand Prix Turbo program. I see on your website that you do the programming for the 1227730 ECM's for the V8's, and you do the 90-91 Pontiac Grand Prix 3.1L Turbo program I need for my 3400 with the same ECM? After I get it installed I can ship the car up to you for tweeking on a dyno. I know it sounds like maybe your repeating yourself, your the expert here not me, so please be patient, I just need to make sure I understand.

Yes, you can use your 93 Beretta ECM (which should be a 1227730) with the TGP programming on the 3400 engine (with custom programming, of course).

[This message has been edited by Darth Fiero (edited 05-02-2005).]

quote Originally posted by Darth Fiero: The 3100 SFI PCM's MAF tables max out at about 163gm/sec airflow which means the PCM might not be able to recognize the increased airflow a turbo would supply the engine. However, I can enrich the fuel delivery in the power enrichment tables to compensate for this so there would be no danger of running lean. Its not the most accurate thing in the world, but it works.

Couldn't you rescale the MAF tables?

Darth,

I sent you a pm a few days ago about doing some work for me,
wasn't sure if you'd seen it yet,

Jamie

Earl-R, you got to let me know how the turbo works out! I'm been thinking of the same idea as Mechanic on 60DegreeV6 forum but my concern is how to route the exhaust. Need a cat & muffler in T.O. and we just installed the cat on the stock motor which is very tight, but it's located where we probably would put the turbo. Other consideration is a S/C in place of the A/C compressor.

As for your programming, I used a ecm for a 3.1L cavalier (same as berreta). I used the stock fiero harness to run most of the lines and just plug & played them into the 3.1 harness, then added the extra lines where I needed them. I'm currently not running the EGR valve. Looking at adapting the new stepper style EGR to the old 3 valve progamming, but someone has actually mounted the older EGR valve straight to the 3400 plenuim horizontally without an adapter plate. just have to modify one mounting hole.

if you like I can send you my diagrams from the 3.1L ecm. You can used it for manual tranny. the TCC line for auto's, you hook directly up to your manual shift light.

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14.380 @ 95.13MPH

quote Originally posted by x-thumpr-x: Earl-R, you got to let me know how the turbo works out! I'm been thinking of the same idea as Mechanic on 60DegreeV6 forum but my concern is how to route the exhaust. Need a cat & muffler in T.O. and we just installed the cat on the stock motor which is very tight, but it's located where we probably would put the turbo. Other consideration is a S/C in place of the A/C compressor. As for your programming, I used a ecm for a 3.1L cavalier (same as berreta). I used the stock fiero harness to run most of the lines and just plug & played them into the 3.1 harness, then added the extra lines where I needed them. I'm currently not running the EGR valve. Looking at adapting the new stepper style EGR to the old 3 valve progamming, but someone has actually mounted the older EGR valve straight to the 3400 plenuim horizontally without an adapter plate. just have to modify one mounting hole. if you like I can send you my diagrams from the 3.1L ecm. You can used it for manual tranny. the TCC line for auto's, you hook directly up to your manual shift light.

Will do on the Turbo. I E-mailed Dennis LaGrua for some insight on the turbo I plan on using. It's a IHI (warner) RHB6 which will be at it's limit on a 3400 SFI engine running 593 cubic ft per minute with a max speed of 140,000 rpm's. It should push the 3400 to about 300HP and 290 lbs torque. I have a set of FOCOA headers off the car I got from Mike I plan on using. But with the turbo, it kinda nagates the purpose, but might flow better with the bigger exhaust runs.(?) I'm thinking of putting the turbo on the drivers side so I can put the intercooler either under the deck vent or behind the Meecham scoop. I need to look at it in more detail, there seems to be more room on that side anyway with the crossover and all.

Back to the headers, someone was selling flanges for the 3X00 engines. I need to look better at my headers, they might fit with the existing flange, if not I'll change to the new one.

I looked at the S/C at one time, but, I love my A/C when I want it.

I was think also about cutting out the lower part of the trunk, (I don't use it anyway, some even put false floors in) so I can route the muffler better. I think I'll leave the Cat in the stock location.

The ECM is coming out of a 95 Beretta. Anyone have any idea if this is the right one? I couldn't find any info on this doing a web search.

X, I would appreciate the wiring diagrams just in case.

Thanks

[This message has been edited by Earl-R (edited 05-04-2005).]

Earl, I use my trunk too much for those trips to the states for car shows. With a turbo, you really don't need headers. If you plan on using them, build it the way PJB has his turbo N* set-up. This way you can set the exhuast up like the the stock fiero. I left my 3400 exhaust stock so it stick out right in front of the truck, does a sharp 90 to the left, about a 170 down into a cat, then another 90 into the stock muffler for now. Next will be a flow master and tips.

My A/C isn't hooked up and never had a working one in a fiero before, so I really wouldn't miss it myself. So many idea's, so little space

email sent

quote Originally posted by Will: Couldn't you rescale the MAF tables?

Good question. Truth be told, the 94-95 3800 SC PCM's I do chips for seem to have the exact same MAF tables with the exact same limitation...however this seems not to be the case because every 3800SC I do a chip for appears to be getting accurate, or near-accurate fuel, under boost. The 3100 PCM may have something else in the programming that will allow it to go beyond this boundry. However, I don't have one of these cars to try this theory out myself so I can't tell you much more about this than what the software is telling me from just looking at a stock chip.

quote Originally posted by ardenQ: Darth, I sent you a pm a few days ago about doing some work for me, wasn't sure if you'd seen it yet, Jamie

Sorry, just getting caught up on my PM's... Writing a reply to you now.

keep the info coming guys, I'll be doing the same thing, after seeing some guy take a stock 3400 and use a rear mounted turbo and get into the 12's!!!