2.2l ecotec in off road buggy

[moose13]

Hello I am planning to install a 2003 2.2l in a off road buggy... so far I have "weeded" out the stock wiring of every thing that will not be used like all the transmission,emissions,2nd o2 sensor..... The only sensors will be used is 1st o2,map,iac,tps,ect,iat,knock sensor... I Have bin reading the forum but could really much on what I want to do... I would like to try and make it run before I mess with the tune thanks Craig....

[moose13]

I quess there's no one on here that has ever done a stand alone system on a 2.2l ecotec thats willing to help...

[moose13]

I quess there's no one on here that has ever done a stand alone system on a 2.2l ecotec thats willing to help...

[MarkTucker]

What is the question that you are trying to get an answer for?

[moose13]

Sorry have gotten busy at work... What I am looking for is what I need to change in the ECM to make it a stand alone...I have the HP tuner software I was able to disable the VATS and was able to get the engine to fire up and idle...What all needs disabled as far as transmission, vss,2nd O2,emissions.... thanks Craig

[moose13]

Has any one on here ever did or tried what I want to do???

[cobaltssoverbooster]

yes i believe it was SCORE Class 10 and SNORE Class 3000 both were sealed motor classes.
i dont have any diagrams anymore so its hard to help.
i can go through a file from the scanner and see what i can remember. what sensors are you trying to keep/remove?

[moose13]

I am thinking 1st oxygen,crank,oil,map,iac,tps,ect,iat,knock sensor...thanks Craig

[cobaltssoverbooster]

set all codes im about to list to "NO ERROR REPORTED" (NER) and uncheck the SES Enable box:
P0137
P0138
P0140
P0141
P0218
P0420
P0440
P0442
P0446
P0452
P0453
P0502
P0503
P0530
P0705
P0711
P0712
P0713
P0716
P0717
P0719
P0724
P0730
P0741
P0742
P0748
P0751
P0752
P0753
P0756
P0757
P0758
P1137
P1138
P1441
P1810
P1811
P1815
P1816
P1817
P1819
P1860
P1887

The codes im listing under this line are optional to turn off if you don't want those systems active or if you turn the ecu on and the codes pop up in the DTC section. Disable the same as before, set to NER and un-check SES:
P0461 Fuel level sender range/performance
P0462 Fuel level sender circuit low
P0463 Fuel level sender circuit high
U1064 Loss of communication to DIM (Body Control Module) *Disable only if code is present in DTC Read
U1096 Loss of communication to IPC (Instrument Panel Cluster) *Disable only if code is present in DTC Read

[cobaltssoverbooster]

as for the tune file once you start tuning you will have to tune the ve tables and use the ve table offset to keep all the ve plots under 100% VE (That's what the editor description says at least. I did notice by tinkering the tables caps are really 120, but for ease of understanding the example below i'll keep calling the cap 100)
so basically the ve tables are only allowed to be commanded at 100% and when you want more than 100% ve then you have to change the ve offset to add to its max value (like 30/40/50%). Remove the offset change you made from every ve table and then go back to tuning the ve tables like you always do. I know the factory file is set over 100 on the high speed ve table but once you make changes in a cell hpt wont let you go over the entry cap of 120 as I mentioned so you will have to rescale by changing the ve offset if you need more fuel there.

so example:
100 is the cap so ill try to explain hitting 120 in one cell, ill use 5000 rpm and 100% tps for example. factory file sets this to 114 but we wanted 120 so 120 + (20% of 120) = 144 [factory ve offset is 20 so that's where 20 percent came from] so you can see with the ve offset added in you would have to go up an additional 30% offset to be able to achieve 150 ve. since 100 is the cap then 50% of 100 is 50 and when added on top of the main ve 100 value you get 150 ve. Now that we increased ve offset to 50% we must correct all the tables before applying the new value for the example cell. We change all the ve tables becasue the ve offset applies to every ve table. Highlight every cell on each ve table and remove 30%(the increase value) by multiplying by 0.7. now the ve command with the new offset will match the ve command before the offset change. To make the final adjustment in the example cell we must determine what percentage of the new 100% total value or cell is going to be. If 100% ve is now 150 then what would be the new percentage to enter in the ve cell? well its like a school grade, you got 144 points out of a total of 150 so 144/150= .96 so the new value would be 96 ve.
This system is pretty efficient once you get the offset set into the correct place, but until you get to a point where you stop adjusting the ve offset it can be frustrating.

I hope I didn't put out any confusing information but to me it doesn't look like there is a whole lot of room left in the factory high speed ve table and I wanted to make sure you were aware of the cap that could cause a load of problems.

[moose13]

Thank you for your info....

I did build my own fuel injection for my VW air cooled engine using a micro squirt computer did most of my own tuning but had it touched up on a dyno it worked and run well... I am still very new to the HP tuner and still learning...

When you uncheck "NO ERROR REPORTED" dose it disable that in the ecm... for example the number oxygen sensor...

[cobaltssoverbooster]

setting to no error reported makes the ecu ignore that circuit completely. ses is "service engine soon" it ties that code to the dash light.

[moose13]

As far as the check engine light goes. I was planing to hook a led light up...could I use the ecm to give the led ground signal and ignition for 12volts...

[cobaltssoverbooster]

only if the original CEL circuit is directly controlled by the ecu. for that I would need the wiring diagrams I no longer have. if it goes through the cluster then the cluster sends signals out as its own control source in some cars and may not trigger any lights you setup.

[moose13]

If I am looking at the drawing right I think it is sending a ground from ecm.?.. thanks craig

[cobaltssoverbooster]

yes the instrument cluster seems to be sending out ignition voltage to the Service Engine Light. Then based off the diodes drawn direction of flow the ecu would ground that LED out through pin D.

[moose13]

Thanks for your help and your knowledge. I have a lot to learn yet... Craig...

[Brett85p]

moose13, did you get this working?
I ask because I am about to attempt the same thing with a 2.2 Ecotec, to start make it run in standalone mode followed by hopefully some performance tuning.

[moose13]

Yes I did get her to run on the engine stand it seem to idle good and revs up nice an crisp... I have to finish building the buggy to install the 2.2eco... still running my old racer for this year.... Brett If any info I go I will be glad to try and help....

[suzukirmzrider]

Hey guys, sorry to bring up an old thread, but I am having tuning issues with my 2.4L LE5 ecotec. It has random misfire at idle and falls on its face when you roll into the throttle. Once you get past the fall on its face, it clears out and runs decent. Do you have any advice on what I need to check in my HPTuner file on it? ANY advice is greatly appreciated. This is in an offroad car as well. Thank You!!!