I am installing an Alkycontrol kit that came with a 2 bar map sensor and got hung up at the point where the map sensor only connects to the PAC box. I would like to use a 2 bar custom OS in EFI live, so I need to connect the 2 bar map to the engine control wires (stock map wires) as well as the PAC box. The pictures show what I am looking at, do I need to splice into the stock map sensor wires? Or, do I need an additional map sensor that plugs in the stock location? The truck has a Magnacharger, fwiw.

 

I run the same parts. Don't hack up your wiring. Just put a 2 bar map on the engine. GM part number 12580698 and keep that map sensor for the alky kit.

 

Bingo. Julio will tell you the same thing, but because he was as much granularity to the PAC as he can get.

 

Cool, that is what I was hoping to hear. Less splicing is better . Thank you for the part number, I'll get one on order. Thank you for the quick info.

 

this is where im at too. i may use this map possibly as my pcm map because this will hook up to a hose easier stockck style would. also because im not running my truck intake anymore.

 

The stock style map will plug into hose if need be. My dad used a piece of 1/2" (I think) hose to move the stock map on his C5 because of firewall clearance issues with a Fast 90.

 

Yeah, just take off the rubber grommet on the stock style map -- hose barb underneath.

 

I have one other question about the Alkycontrol kit, where did you guys find switched 12v under the dash to power the PAC? The pump has a large motor, so I need to find a wire fused for at least 15 amps.

edit. My truck is an 05, so it uses data bus. I am still searching for answers, LOL.

 

Well, I fixed up the wiring I already had, added a relay and everything runs great right now. I am using the only switched 12v pin I could find on the driver side fuse pannel to trigger the relay, the only problem might be that it becomes 5v when the key is in acc. position. I had some heater circuit codes pop up a while ago, I though that may be due to using that pin. I am up and running now though

Alkycontrol is great! The kit works flawless. I pulled some fuel out of the PE table to get an 11.5:1 AFR. I also bumped my timing from 17 degrees to 25. Before Alky, I would get a bit of knock at 17 degrees, now I don't have a hint and am running 25. The truck pulls much harder now. I can't wait to get it back to the track. Thanks TurboBerserker and KySilverado for the help.

 

I pulled in a big hot wire from under the hood and put it to a relay then ran a switched source from the fuse box to pull in the relay and power the pump.

EDIT: oops just read that is what you did. Great minds think alike.