0411 running a 2.5L Jeep engine.

[Thorwon]

I given up on using the Jeep throttle body. I just can't get the IAC to work with the GM computer.
The lowest I can get it to idle is @1100 and it's always changing 100 -200 RPM.
I made an adaptor for the throttle body I have from a 2004 4.3L V6 and it works good so far.
It's idling at 650 -700 RPM just like it should be. I'll be installing my wide band and gauge tomorrow so I can start tuning it.
I've turned the MAF off for the moment. I've never done that before and just wanted to see how much it affects it.

After putting the GM throttle body on this engine and how it responded, I think I need to get another one for my 4.0L in my truck, that I'm running on a P59.

[1project2many]

I given up on using the Jeep throttle body. I just can't get the IAC to work with the GM computer.

When I put the 7749 into my Toyota I grafted on the IAC adapter plate from a 4.0 TB. I ended up switching out the Jeep IAC for a GM IAC. You've already made your adapter but if you'd like I will see if I can find the number of the IAC I used.

[Thorwon]

When I put the 7749 into my Toyota I grafted on the IAC adapter plate from a 4.0 TB. I ended up switching out the Jeep IAC for a GM IAC. You've already made your adapter but if you'd like I will see if I can find the number of the IAC I used.

That would be great info to have. So yep if you can find it I'd love to have that part number.
If ya got a pic of the way you mounted it, I'd like to see that too.

[Thorwon]

Here's a short video of it running.
https://www.youtube.com/shorts/kIXigekwo-A

[1project2many]

That would be great info to have. So yep if you can find it I'd love to have that part number.
If ya got a pic of the way you mounted it, I'd like to see that too.

Sure. The pictures of the TB modification are blurry so I apologize for that. But it should show what I did.
http://home.metrocast.net/~shannen/y...ota_TB_01.html

It looks like I didn't keep the receipt for the IAC valve that I used. But I wrote down the following IAC part numbers to compare to the Jeep part:
217-419
19333272
17113209

[Thorwon]

Sure. The pictures of the TB modification are blurry so I apologize for that. But it should show what I did.
http://home.metrocast.net/~shannen/y...ota_TB_01.html

It looks like I didn't keep the receipt for the IAC valve that I used. But I wrote down the following IAC part numbers to compare to the Jeep part:
217-419
19333272
17113209

Very nice.
Were you running it on a 0411 or is it a Delco?

[1project2many]

Thank you,

I used a 1227749 OBD1 Syclone / Typhoon ecm.

I found a thread where folks using Megasquirt to replace the OE ECM on a 4.0L switched to the 217-419 b/c they couldn't get the idle controls to work properly.
https://www.msextra.com/forums/viewtopic.php?p=124884

Sounds like your engine is in pretty good shape. Jeep 2.5's do not like to die.

[Thorwon]

Thank you,

I used a 1227749 OBD1 Syclone / Typhoon ecm.

I found a thread where folks using Megasquirt to replace the OE ECM on a 4.0L switched to the 217-419 b/c they couldn't get the idle controls to work properly.
https://www.msextra.com/forums/viewtopic.php?p=124884

Sounds like your engine is in pretty good shape. Jeep 2.5's do not like to die.

I'll look into that IAC.
My dad rebuilt it completely about 8 years ago. My son got it from him and drove it while he was in high school.
I'd bet it doesn't have 20K on it since it was rebuilt.