i need a chip or ecm reprogram for 4.1 buick engine in my willys

[Jeep Nasty]

i posted a couple weeks ago about a 4.3 swap i was considering. the more i looked into the project, the more i realized that swapping out the current 4.1 buick in my willys was impratical and i should just get the 4.1 buick running properly and i would get the same power as the 4.3 i was planning on putting in.

i think part of the problem with my current set up is the emmisions equipment not working properly and the computer was never programmed specifially for this application.(not sure since i bought the jeep with the engine swapped in already)
so i was wondering if it is possible to reprogrm the ecm in my current setup while eliminating any unecesary items. my jeep is a 1948 and doesnt need any of the emission stuff but what else can i eliminate. does eliminating the emissions stuff get rid of the MAP sensor and such. if we rework the ECM can i just disconnect the componets we removed form the computer, because i really dont want to pull out the harness.
the setup i have currently works but the engine runs very rich and just seems to lose power in hill climbs and above 45mph on the highway. just very finickey and not working correctly.

this is my current setup
Motor: 1983 Buick 4.1L V-6, rebuilt about 40K ago, TRW alum. Pistons, .030
overbore, Cam Dynamics RV cam, sequential multi port fuel injection from
Grand National Buick. The computer, e-prom, cal pack, mass air sensor are
all new parts (2 year old) from 84 Regal. K&N cone air filter with outer
sock.

Alternator: 94 amp Delco reman., 2 months old

Transmission: 700R4 auto, rebuilt 1 year ago, electric servo to lock
in 1-2 gear, all metal rebuild components-not plastic


Transfer Case: Dana 18, 1-1-8" intermediate shaft, single stick, 3:86 low
ratio from O'Brien, rebuilt with large roller bearings and thrust washer
eliminator,



how long will reprogramming take???? or getting a chip????
can i get away without a reworked harness and just disconect the components that i eliminate form the ecm????

thanks guys.

[MrWillys]

Correct me if I'm wrong.
Your running a Buick Grand National ECM, chip, and injection system for a turbo charged motor without the turbo? Does it have a 1226459 ecm?
I really think your problem is incorrect programming, and the injectors are way to big for a naturally aspirated engine.
When I think of emissions... I think smog pump, charcoal cannister. To me everything else makes the motor more efficient and is a good thing! A perfect example is the EGR. This damn thing saves fuel, and in todays world I kinda like it.
Sorry, but your MAP sensor is the heart of injection, or mass air sensor. Therefore you can't remove it.
What would I do if I were in your shoes? Two choices here: #1 Get an ecm from a 4.3, and go to the library and study the pinouts on the ecm's and swap it in and change to 4.3 injectors. #2 get a new harness and injectors from someone like Affordable Fuel Injection here on the board and start over. #2 is easier, but will cost you more. Steer clear of moron's who say they can do #1 for you?
Tell me if i got it wrong...

Originally Posted by Jeep Nasty

i posted a couple weeks ago about a 4.3 swap i was considering. the more i looked into the project, the more i realized that swapping out the current 4.1 buick in my willys was impratical and i should just get the 4.1 buick running properly and i would get the same power as the 4.3 i was planning on putting in.

i think part of the problem with my current set up is the emmisions equipment not working properly and the computer was never programmed specifially for this application.(not sure since i bought the jeep with the engine swapped in already)
so i was wondering if it is possible to reprogrm the ecm in my current setup while eliminating any unecesary items. my jeep is a 1948 and doesnt need any of the emission stuff but what else can i eliminate. does eliminating the emissions stuff get rid of the MAP sensor and such. if we rework the ECM can i just disconnect the componets we removed form the computer, because i really dont want to pull out the harness.
the setup i have currently works but the engine runs very rich and just seems to lose power in hill climbs and above 45mph on the highway. just very finickey and not working correctly.

this is my current setup
Motor: 1983 Buick 4.1L V-6, rebuilt about 40K ago, TRW alum. Pistons, .030
overbore, Cam Dynamics RV cam, sequential multi port fuel injection from
Grand National Buick. The computer, e-prom, cal pack, mass air sensor are
all new parts (2 year old) from 84 Regal. K&N cone air filter with outer
sock.

Alternator: 94 amp Delco reman., 2 months old

Transmission: 700R4 auto, rebuilt 1 year ago, electric servo to lock
in 1-2 gear, all metal rebuild components-not plastic


Transfer Case: Dana 18, 1-1-8" intermediate shaft, single stick, 3:86 low
ratio from O'Brien, rebuilt with large roller bearings and thrust washer
eliminator,



how long will reprogramming take???? or getting a chip????
can i get away without a reworked harness and just disconect the components that i eliminate form the ecm????

thanks guys.

[Jeep Nasty]

Originally Posted by MrWillys

Correct me if I'm wrong.
Your running a Buick Grand National ECM, chip, and injection system for a turbo charged motor without the turbo? Does it have a 1226459 ecm?
I really think your problem is incorrect programming, and the injectors are way to big for a naturally aspirated engine.
When I think of emissions... I think smog pump, charcoal cannister. To me everything else makes the motor more efficient and is a good thing! A perfect example is the EGR. This damn thing saves fuel, and in todays world I kinda like it.
Sorry, but your MAP sensor is the heart of injection, or mass air sensor. Therefore you can't remove it.
What would I do if I were in your shoes? Two choices here: #1 Get an ecm from a 4.3, and go to the library and study the pinouts on the ecm's and swap it in and change to 4.3 injectors. #2 get a new harness and injectors from someone like Affordable Fuel Injection here on the board and start over. #2 is easier, but will cost you more. Steer clear of moron's who say they can do #1 for you?
Tell me if i got it wrong...

as far as engine stuff i'm asking for info because ive never done much engine work, and am not too familiar with how all the fancy stuff works on them. so i was wondering what was good to get rid of that does nto affect performance. like can i get rid of the o2 sensors through reprograming or is that not a good idea???

so i guess i'm looking for the easiest way to ge tthis thing working correctly. i have a 4.3 sitting in the garage that i got out of a 2000 blazer with 60k on it with the harness and computer and the 4l60e tranny. i would jsut rather fix the computer on what i have instead of swapping in the newer setup and still needing to program the compter and adjust the harness. not too mention having to refit the different engine in.

[Geesh]

Affordable Fuel Injection programs and provides EPROM's for GM ECMs. I have a one that needs only minimal equipment to run, as my rig is a 1962. Things like the O2 sensor, TPS, etc., are on board, but the hooks and wait states for the 4L60e that originally came with my 4.3 are programmed out.

It'd be worthwhile to spend some time on the phone with those folks to get the skinny on what's needed for your rig -

Good luck

[Jeep Nasty]

Originally Posted by Geesh

Affordable Fuel Injection programs and provides EPROM's for GM ECMs. I have a one that needs only minimal equipment to run, as my rig is a 1962. Things like the O2 sensor, TPS, etc., are on board, but the hooks and wait states for the 4L60e that originally came with my 4.3 are programmed out.

It'd be worthwhile to spend some time on the phone with those folks to get the skinny on what's needed for your rig -

Good luck

i've been emailing them for a couple days and i pm'd him on pirate but i havent gotten a response yet. so i guess i'll try calling today.

[mysunnshine]

Originally Posted by MrWillys

A perfect example is the EGR. This damn thing saves fuel, and in todays world I kinda like it....

I'm confused....How can the EGR save fuel?

[MrWillys]

Originally Posted by mysunnshine

I'm confused....How can the EGR save fuel?

The exhaust Gas Recirculation valve operates during high vacuum operation of the engine. In high vacuum conditions the motor isn't very efficient. The egr allows the exhaust gases to be mixed with intake air and reburn any unburnt fuel. It's also sometimes referred to as a coast valve. It accomplishs this two fold, it completes the burn of any unburnt gases and helps to lean the mixture during certain conditions.
It becomes a problem when it becomes contaminated with carbon and creates a vacuum leak. I believe todays newer technology has been able to eliminate it by adjusting for these conditions in the programming though. However, to remove it on a motor not designed without it is foolish.