2.2 Engine with 2.4 throttle body

[Anks329]

Hi all,

I've added a 2.4 intake manifold and throttle body to my 2.2 engine. I'm trying to get the engine to fire up and stay on, but having some issues with it. I went to the HP Tuners repository and pulled a stock file from a 2007 Chevrolet Cobalt Engine: 2.4 L4 - Automatic and tried to copy over items that I thought I would need to change. Mainly I thought I needed the:

• Idle ETC Area scalr
• Idle Effective Area Mix, Min
• MAF table Low
• MAF Table High
• VE Tables

But this doesn't seem to be enough, I'm able to crank the engine, but it shuts off within a few seconds. I've got an Engine Power Reduced, Engine Disabled error at the moment. I can clear it out, but I'm not able to get the engine to run.

I've attached my existing base tune (2024 Final Tune) and the tune from HP Tuners (2007 2.4 L4 - Automatic). Any pointers on how to merge the two and get my engine to run?

 

[Gtstorey]

Did you try it before changing your tune?

 

[Gtstorey]

And is a common swap or are you experimenting.

 

[Joebob]

I would not adjust the MAF or the VE tables to the 2.4. you still are a 2.2L engine. the MAF calibration is calibrated to the MAF tube diameter. a bigger engine or a more free flowing engine should only move up the MAF frequency scale, not alter it. The VE table is set up for your 2.2L engine. A 2.4L is going to pull a larger air mass into the engine for a given pressure and RPM. adding the 2.4L VE tables will make you run very rich. I think it should still run, but rich.

Are you running the 2.4 MAP sensor or your original one. That could cause error in not seeing the right pressure. Also have you confirmed that you have the TB wired correctly? The wiring changed over the years 6 pin, 8 pin, different pin outs, ect. it may not be a plug and play. I had to put an adapter in to convert from a 2008 8 pin 2.4L TB to an LSJ TB. You might have to do the same.

Before tuning changes:
Make sure the TB opens and closes per the throttle with key on and engine off.
Make sure you are using the correct original MAP sensor for the 2.2 and leave the original programming intact and wiring plugged in.
Make sure the original MAF sensor is plugged in and facing the correct way with the original calibration in the programming.

I would think at this stage, you should only be adjusting the TB scalar to match the 2.4, but also make sure you use the year of the TB you got as there might be differences.

Good luck.

Joe

 

[Gtstorey]

If this isn’t a known to work swap, there is good chance it won’t work. GM ECM, throttle and pedal have to match up. And can be very picky.
But also agree that maf and ve table return to stock. And map sensor needs to match what is in the tune. And what codes is it throwing?

 

[mike_sno]

I had engine power reduced when the MAF to the VE table did not fit. You could try disable the VE table or disable the MAF and see if the engine stays on.

 

[Anks329]

This is definitely a supported mod; there are many posts around the web where upgrading to the 2.4l intake and manifold has been done.

I would not adjust the MAF or the VE tables to the 2.4. you still are a 2.2L engine. the MAF calibration is calibrated to the MAF tube diameter. a bigger engine or a more free flowing engine should only move up the MAF frequency scale, not alter it. The VE table is set up for your 2.2L engine. A 2.4L is going to pull a larger air mass into the engine for a given pressure and RPM. adding the 2.4L VE tables will make you run very rich. I think it should still run, but rich.

Are you running the 2.4 MAP sensor or your original one. That could cause error in not seeing the right pressure. Also have you confirmed that you have the TB wired correctly? The wiring changed over the years 6 pin, 8 pin, different pin outs, ect. it may not be a plug and play. I had to put an adapter in to convert from a 2008 8 pin 2.4L TB to an LSJ TB. You might have to do the same.

Before tuning changes:
Make sure the TB opens and closes per the throttle with key on and engine off.
Make sure you are using the correct original MAP sensor for the 2.2 and leave the original programming intact and wiring plugged in.
Make sure the original MAF sensor is plugged in and facing the correct way with the original calibration in the programming.

I would think at this stage, you should only be adjusting the TB scalar to match the 2.4, but also make sure you use the year of the TB you got as there might be differences.

Good luck.

Joe

Good suggestions here. I have my original 2.2 MAF, but I did realize that I never swapped out the 2.4 MAP on the manifold and I need to swap that out. I did get the ZZP throttle body adapter wire to go between the 6 and 8 wires. The throttle body is opens and closes with the key on and engine off.

Ok, next steps I need to swap the MAP sensor, reset the tune to only adjust the ETC scalar and leave everything else alone and then try again.

 

[Gtstorey]

You can use either map sensor by changing the settings in the tune. Either maf can be used but it could be the original might be closer. Either one will probably need tuning. At this point the airflow will be a lot different than the original cobalt.