Stoichiometric

iTrader: (10)

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.

KySilverado

iTrader: (7)

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.

TurboBerserker

iTrader: (1)

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

Stoichiometric

iTrader: (10)

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.

2004SSS

iTrader: (25)

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.

Stoichiometric

iTrader: (10)

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.

TurboBerserker

iTrader: (1)

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

Stoichiometric

iTrader: (10)

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.

Stoichiometric

iTrader: (10)

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.

KySilverado

iTrader: (7)

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.