Fast355

I have had multiple people ask about re-pinning their earlier TBI cars/trucks to use the latest PCM. So here is the result. Information regarding the swap. PCM Swap/Tuning Notes 8746/6965/7747/299 to 427 Truck PCM (Car showed, Trucks VERY similar) Old Pin----New Pin-----Color------------Function A1--------F6----------GRN/WHT-------Fuel Pump Relay Control A3--------F16---------DK GRN/YEL-----Charcoal Canister Purge Solenoid A4--------E1----------GRY-------------EGR Control A5--------E6----------BRN/WHT--------Service Engine Soon Light A6--------E15---------PNK/BLK---------Ignition Feed +12VDC A7--------(1*)--------TAN/BLK---------TCC/Shift Light A8--------F9----------ORN------------Serial Datastream A9--------A14---------WHT/BLK-------Diagnostic Test A10-------F13---------BRN------------Vehicle Speed Signal A11-------B3----------BLK------------Sensor Ground A12-------A1----------BLK/WHT-------ECM Ground 1 B1--------E16---------ORN------------Battery +12VDC B2--------B12---------TAN/WHT-------Fuel Pump Signal B3--------A5----------BLK/RED--------EST Ref Low B5--------A4----------PPL/WHT-------EST Ref High B6--------?-----------PPL-------------VATS(2*) B7--------(3*)---------BLK-------------Knock Sensor B8--------E12---------LT BLUE--------A/C Clutch Signal B10-------E5----------ORN/BLK--------Park/Neutral Switch C1--------(4*)-------BLK/PNK---------A.I.R. Converter Solenoid C2--------E7---------BRN-------------A.I.R. Port Solenoid (Diverter in trucks) C3--------A7---------LT GRN/BLK------IAC "B" Low C4--------A8---------LT GRN/WHT-----IAC "B" High C5--------A3---------LT BLU/WHT-----IAC "A" High C6--------A6---------LT BLU/BLK------IAC "A" Low C7--------(5*)-------LT BLU-----------High Gear Switch (In Auto Trans) C8--------(6*)-------LT BLU-----------Power Steering Pressure Switch C9--------(7*)-------PPL/WHT---------Crank Signal C10-------B8---------YEL--------------Coolant Temperature Signal C11-------B13--------LT GRN----------MAP Signal C12-------B9---------Tan-------------MAT Signal(8*) C13-------A15--------DK BLUE--------TPS Signal C14-------E14--------GRY------------5 Volt Reference C15/D14--A9---------DRK GRN--------Injector "2" Control C16------E13--------Orange----------Battery (Inputed in place of Brake Switch for TCC to function) D1-------A2---------BLK/WHT--------ECM Ground 2 D2-------B4---------PPL-------------MAP Sensor Ground D4-------F11--------WHT------------EST Signal D5-------B2---------TAN/BLK--------EST Bypass D6-------A12--------TAN------------O2 Sensor Ground D7-------A10--------PPL-------------02 Sensor Signal D15/D16--A16-------DK BLUE---------Injector "1" Control Swap Notes (1*)= Use E2 for a shift light on a manual transmission or E10 for the TCC on an Automatic (2*)= Supported by the PCM if optioned in the Prom on an UNKNOWN pin (3*)= A.) Wire like 1995 P30 Step Van, ESC Module output to B7 (3*)= B.) Wire like 1995 C10 Truck, Bypass ESC (Blue to Brown) and use Late TBI/TPI 305/350 Knock sensor (4*)= Air injection into converter not used on trucks, but PCM has several other un-used outputs (Tuning Valve, Idle Kicker) (5*)= Not Used by PCM (I like to leave the small connector in place and pin in unused wires) (6*)= Supported by PCM if optioned in the Prom on an UNKNOWN pin (1994-1995 2.2 S10 Wiring Diagram anyone?) (7*)= Not used by PCM, Remove 3 amp "CRANK" fuse from fuse box and store in small connector) (8*)= Supported by the PCM, but functionality will need to be enabled in the Prom 6965 ONLY- Will have a NC relay that the computer grounds to shut-off the A/C compressor when the engine is heavily loaded. The A/C will work either by removing the wire all-togather, or connecting it to pin E3 (A/C Cut-Off or CPI Tuning Valve output) I would also like to mention that the orange Serial Data wire needs to be relocated from the top row, Pin "E" to the lower row, Pin "M". You will also need to scan the vehicle like a 1993-1995 G-Series Van, C-Series Truck, S-Series Blazer, etc with Auto transmission. Finally, this is a trick Haulin@$$ taught me, if you have a wideband and are looking to get real-time AFR put into the datastream, hook the 0-5 volt signal into pin B16 (Linear EGR pintle position feedback). With some adaption to the ALDL Definition being used to decode the reading, you can get an AFR reading of 10-20:1 or so.

This ad is not displayed to registered members. Register your free account today and become a member on ThirdGen!

__________________
350 Vortec shortblock, balanced, blueprinted, 18cc dished pistons, total seal rings, ported 906 Vortecs, Edelbrock TPI Vortec base, Custom Reed Grind Hydraulic Roller Cam, Doug Thorley Tri-Ys, 2 1/2" exhaust, Stock TPI runners and plenum, stock 48mm TB, 24# LT1 injectors, AFPR @ 46 psi, 7730 ECM, DIY Tuning, stock 1,600 rpm stalled 700r4, 3.08 gears, P295/50/R17 tires.

Soon- 4L60E and 7427 TBI PCM in MPFI mode

RFmaster

Fast355

This is a sticky material - nice summary!

//RF

dimented24x7

Thread stuck. I will also follow up with my source code at some point when its finally done.

JohnBlazeLTZ

Man...you guys are awesome! Thanks for taking the time to compile all the good stuff and keep it in order for all the interested people!

JB

RacerX13

Can this swap be done without chip burning equipment? I haven't gotten into diy prom yet, and I'm still trying to figure out which way to go. It's looks like this is the best ecm/pcm to use in the end, so would I be ahead to just start with this one? I have a manual trans- are there any stock memcals that would work? Would I be better off to just get the EBL and use it until I get comfortable with tuning? TIA.

BTW- I have a '95 C1500 4.3/4L60E with this pcm and there is noticeable difference in overall driveability between this and my Camaro.

Fast355

No stock memcals will directly work that I know of. Although you can get away with an automatic trans memcal.

BTW- I did the PCM swap with the addition of a 4L60E in my 1987 S10 Blazer. I loved the difference after tuning the 4.3 computer form my application. That little 2.8 actually pulls nicely and has a little punch now.

Joelkatdaddy

Hey, I am currently using a 7747 ecm to control my tbi 350 in a 91 s10 blazer with a 700r4. I have the tune fairly close from hours of datalogging and my ostrich. During my readings on here, I can see the truck pcm is the way to go. I understand all the pin changes that are needed, but I still have a few questions..

1. Will I still be able to use my Ostrich. It appears I can using a G1 adapter from craig.
2. Are there any other changes that will need to take place?
3. Eventually I would like to run a 4l60e, Fast355, you never mentioned any of the wiring for that.
4.Where can I find a stock 350 bin? I have searched and searched. I know it is out there, but I need a little assistance finding it.

I think that is all I have for now. Thanks in advance. You guys really amaze me with the ecm/pcm mods you pull off.
Joel

Fast355

A.)You can still use your Ostrich, you just need to get the Memcal adapter from Moates, IIRC it is the G1. (Forget the designation he uses, but it piggybacks to the stock memcal and to the PCM)

B.) You need to obtain the later model TBI 350 knock sensor and bypass the ESC module. The changes you state need to be changed in the PROM, basically tell the PCM that it is controlling a Torque Converter clutch only in the 700r4 and not the whole valvebody of the 4L60E. Otherwise it will pop transmission codes like crazy.

C.)You are in luck on the 1991 S10 setup, you only have to add one wire from your DRAC to the PCM to control the shifting. Your 1991 should already have the 40 tooth reluctor and VSS on the tailshaft of the 700r4 that is in it now and an electronic cluster. I had to add a DRAC and Electronic speedo from a 1993 S10 to my truck. I would suggest finding a 1993 S10 DRAC for your 1991 S10.

I have the pin-outs for the wiring on the 4L60E and will post them up soon. There are 12 or 13 wires going to the transmission from the PCM. I built my transmision harness from a $15 transmission pigtail end from EFI Connection.

I have a plethora of stock .BINs for these PCMs. I think I have several 350s, 305, HD 350, 454, Export 350 Vortec TBI, 3 x 4.3 CPI, 4.3 TPI, Custom DIY 2.8 TBI, TPI 305, and a multitude of others, 2.2 S10.

Joelkatdaddy

Hey fast, i have everything i need to complete tis swap except a bin to start with. For now i will be running the tbi 350 and a 700r4. Do you think you could post a file for a bin that would be most compatible for my setup? Thank you
Joel

Fast355

If it is a stock 5.7 TBI, I Sure do and also have a TunerPro XDF with all the TCC only stuff added in.

Attached Files

	BJYL 350 TBI 700r4.zip (30.3 KB, 101 views)
	Fast 355 $OD 700r4.zip (13.4 KB, 85 views)

Joelkatdaddy

Hey fast, thanks, but when i try to unzip those files it says they are corrupt. Is this a problem on yours, or my end. Thanks again
Joel

Fast355

I forgot to mention this. Open it with Mozilla Firefox. The problem is on neither of our ends. It is an internet explorer problem.

If you would rather not mess with Mozilla Firefox, PM you Email address and I will send them directly to you.

Pelle

Just to make my mind absolutely clear:

In my case I want to convert a 7747 on a L05 to the 427 PCM.

I guess ANY 16197427 will work? Even a 427 from a 4.3 L35 for example?

Fast355, you wrote that truck PCM:s are "VERY similar", is it some pinout that differ or just cable colors?

Just to refresh my memory, the ESC module is that separate thing on a 7747, but on the 427 the ESC module is integrated in the PCM?

carls1982z

yes esc module is sep from ecm.on the 7747 -----And fast,, thos bin you posted, are they for 7747 ecm ????? i currently run a 7747 with prominator and tuner pro.--want to read and study them to what i have now

MarcusMandarino

Fast355

I found the info about PSPS on Chilton's, page 6-60, 2.2L > F8

Marcus

S105.7

Fast...any thoughts on whats a better bin to start with? im going to be adding this to my '92 RS. im gonna mod the injector constant for 61#ers, but i was wondering if there is a better spark curve to mess with. id think that the advance is pretty lame on a heavy full-size. im sure the camaro could use a much quicker curve. also, the PCM im getting is from a 4.3L Astro van. how is my MemCals knock module and such gonna workout with the 305?

for those who care, there are a few '427s on ebay right now for $25 plus $12 shipping.

Fast355

The 4.3 knock filter stuff seems to work fine with my 305, which incedently I have upgraded to dual knock sensors, like the L35.

I would probably start with BRDW, which is the Export L31 TBI calibration.

You might be surprised how little additional timing the TBI F-car requires over a truck.

Thanks for the info, I am updating the pin-out now, I have since researched the HACK for the PSPS items. They just need to be enabled so that they will work. Might as well use it, if you have it available.

superbee

the converter wire needs to be updated to e11 still.

Fast355

Since this has now been stickied, I no longer have access to edit it. I plan to repost this in PDF form, but haven't had the time too.

superbee

ok i dont know what to do, i cannot get my aldl to communicate with my laptop, before ecm swap i could using windaldl, now with ecm swap and using datamaster or tunerpro, i cannot communicate.

I have ground on a of aldl 12v on F, and on pin M i have my orange serial datasteam wire, I even tapped into it at the aldl connector and ecm and it ohm'd out perfect. IS there anything else im missing??? Only other thing i can think of is my aldl to usb cable from aldlcable.com is jank right now....

Help please.

S105.7

delete

RFmaster

Hey Fast355

I was cruising local JY (it was 50% off days) and came across three Venduras 2500 and one burb 1500. Long story short I pulled 3 PCM's of the following flavors:
16168625 BHAZ (from the burban)
16197427 BPRY (from vendura)
16197427 BNKM (from vendura)
and one pig tail for ease of re-pinning. Now I need a new project... hehe

//RF

morgsie

Looking to upgrade my '89 Caprice to a '7427 and swap in a 4L60E but stuck on which year trans I should get. Can the '7427 control the mid-'95+ 4L60E with the PWM-contrilled TCC, or will I have to go with a 93/94 non-PWM version?

Thanks.

Fast355

I just saw this post, but the 7427 WILL control a 1995+ PWM 4L60E and did so from the factory. For .BINs equipped with PWM, look for the following.

BJXA = 4.3 V6
BHMC = 305 V8
BJYN = 350 V8

FWIW- The 60E core I just scored for my 83 Van is a PWM 13 wire unit from a 1995 Impala SS.



Also take note here, if you have a 2004R in that Caprice, the tailhousing from the SS has an additional mount that is in the same location as a TH400 or 2004R.

morgsie

Thanks for the info Fast355! My Caprice came with a 700-R4 (it's a cop car w/ the L05) so it should be a bolt in affair for the 4L60E. I'm also looking for a 4L60E out of an Impala SS or 9C1 of the same vintage so good to know that the PWM will work with the '7427.

Thanks again!

96LT4c4

subscribed

dimented24x7

Fast,

If you want to edit this thread still, let me know by posting. I think you should have access again once I unstick the thread. I can also attach additional files to it if you wish...

Fast355

I will re-look into it as soon as I get the time. Work, School, and chores around the house have all my time taken now days.