installing aTBI

[p-townchris]

Hey guys found this site and you guys might be able to answer a questions or two.

Taking the motor and ecm and wiring harness from a 93 Buick roadmaster station wagon and dropping it in a 85 Sub with a 700r4
want to say ecm is 16136965 the only part i was not able to get was the obd connector well I got some of it not sure on the wiring of it. any help would be grateful.


cris

[EagleMark]

The 93 Roadmaster engine was TBI right? Has the air cleaner with 2 bolts holding in on? That engine has a differant distributor than most other V8 TBI engines, looks almost identical but sits a little lower so you need to keep it with motor, they don't change.

Here's a link to a home made wiring diagram there may be others...
http://www.chevythunder.com/16136965_ecm_diagram.htm

$62 Mask ID when you start to do chips and datalogging..

Not really sure what transmission came in the 93 Roadmaster? Or how the 700R4 was controlled in a carb truck?

Good luck!

[p-townchris]

Yea found that diagram helped out a lot got everything labeled. having a problem finding a diagram for the ALDL connector.
The tranny is basic 4 pin for the lockup got a convertor for the speedo to the VSS system
Hoping to start on it this weekend. will try to post pictures.

[EagleMark]

Pictures are pretty easy to post here, we have the size, file extensions etc.. set wide open to let most all documents in!

I attached a better wiring diagram for this ECM. It has 2 wires run to ALDL on it, but it looks to be the same as most C3 like a 1227747 except has a few extras.

A3 Dark Green/Yellow 428 Canister Purge Solenoid
C1 Black/Pink 429 Air Divert Solenoid
C2 Dark Green/White 459 AC Compensation Relay Control
C8 Light Blue/Orange 495 Power Steering Pressure Switch
C12 Tan 472 MAT (or IAT) Signal

[p-townchris]

OK got started today here's pictures.

http://i253.photobucket.com/albums/hh65 ... CI0204.jpg" onclick="window.open(this.href);return false;

http://i253.photobucket.com/albums/hh65 ... CI0207.jpg" onclick="window.open(this.href);return false;

http://i253.photobucket.com/albums/hh65 ... CI0209.jpg" onclick="window.open(this.href);return false;
old one

http://i253.photobucket.com/albums/hh65 ... CI0211.jpg" onclick="window.open(this.href);return false;

new going in.

cris

[EagleMark]

Well you got a big project going on!

Nice Shop! What's all that blue equipment in background? Looks like an air compressor, welder, generator and I really don't know what they are? And an airport tug?

[p-townchris]

Yea I go all out sometime.

Yes there diver's breathing air compressor's', parts of generators. (second job)I work for ship hull cleaning company.
Yea the crane's cool they bought it a government auction years ago thing back in the '80

cris

[p-townchris]

update

It's been fairly painless so far motor's in then back out (bolted flex plate in backwards ) then in again. Wiring has been to bad hardest part making sure what gets 12vdc all the time and make sure what gets 12vdc with the key on. Turned it over tonight and nothing found out no voltage to injectors. So should have that straight tomorrow night and maybe I've done everything right. More photos soon.

chris

[EagleMark]

Well remember the ECM needs a power all the time. Then, ususally the pink wire needs power with key on AND all the way to crank and back to key on. Easiest way to do this is take the wire from your points or old HEI ignition and let it energize a relay. HTH!

[p-townchris]

ITS ALIVE

Found two 12v source's for check engine light and one for the injectors didn't fire up right away, distributor 180 out got that right then she fired up ran nice and smooth


chris

[EagleMark]

[p-townchris]

Update got truck up and running had an issue with the engine temp. It's was running to cool with a 195 thermostat engine barely got over 185 finally got a 205 thermostat in it and got the temp up to 190 to 195, chasing that issue and hunting every weekend plus working two jobs hasn't left me with any time. Now the kick in the head problem I now have gas mileage BLOWS around town it's not bad but on the highway I might get 10. Thinking about installing a different ECM Oh yea can't get a shop to even talk to me about my problem.

Have a 16136965 in the truck now going try to find a 1227747 to drop in any thoughts??

cris



http://i253.photobucket.com/albums/h...s/DSCI0212.jpg

http://i253.photobucket.com/albums/h...s/DSCI0214.jpg

http://i253.photobucket.com/albums/h...s/DSCI0222.jpg

[EagleMark]

Have you got any data logs?

Have you tuned changed the bin at all?

Do you have any error codes?

Do you have an EGR valve?

Where is your MAT sensor located? It has to be where the ECM thinks it is. Some are in manifold and some are in air filter. Makes a big difference. I know in the B body Caprice that uses this ECM it is in the air filter. Not sure where it was in a F body Camaro? What bin are you running? I think a B body would be a better start for a truck conversion.

No real reason to change from a 160 baud ECM with MAT to a 160 baud ECM with no MAT...

[dave w]

Have a 16136965 in the truck now going try to find a 1227747 to drop in any thoughts??

cris

I don't think there are significant gains for changing the 16136965 ECM to a 1227747 ECM. Are you thinking of using the 1227747 because the "chip will be for a pickup" or because the 1227747 is a pickup ECM and the "Factory must have good reasons for having a pickup ECM and a car ECM"? The basic reason for a pickup ECM and car ECM is emissions!

My thinking is the 1228747 is a better pickup ECM than the 1227747 ECM. The downside to the 1228747 is the lack of support software. The 1228747 has factory chips that are better suited for swapping in a TBI than the 1227747 chips. The wiring is the same for both the 1228747 and 1227747.

dave w

[1project2many]

But I would consider using the car ecm for the IAT and the native highway fuel and spark modes. I helped install a modified 305 TBI into a 1/2 ton truck that would get 22 mpg highway and burn the tires like a 350. Mods were 1.6 rockers, shorty headers, and a modified TBI intake manifold plus custom chip.