back to pcm controlled boost - SRT Forums

1fast4 · 11-13-2008, 04:17 PM

ok, so i want to go back to pcm controlled boost and i know HOW to hook the lines up but i have a question. i have my boost set at ~21-22 psi using just the wga i have so should i back the arm down until it rests on the flapper like the stocker, just tight enough to hold the flapper?

the reason i want to go back to pcm is because i hate having absolutely no traction until i am in the middle of third. i did try this once before about a week ago and i didn't adjust the wga arm down and i boosted to 30+ at part throttle so i don't know if it is because the arm is just too tight or if the solenoid somehow went bad.

thanks

**Philth** · 11-13-2008, 04:20 PM

Reset PCM and do what you mentioned. Then gradually adjust back up to your desired boost levels.

1fast4 · 11-13-2008, 06:03 PM

thanks man. that is what i figured but wasn't sure. i thought my solenoid went bad when i tried it the last time.

1fast4 · 11-17-2008, 08:37 AM

so i backed the wga down all the way to where the stocker would normally rest on the flapper and i still get 28psi. could that be because of the map clamp or the fact that i don't have the TIP sensor connected? so what i did was just back the wga down some more so that the flapper stays open a little bit all of the time and i have it down to ~19psi, BUT i don't get full boost until about 4k rpms, so it's like having a really big turbo without the power. so, my traction problem is fixed because it doesn't build boost quick at all but it isn't working like it should and i know it.

should i try to hook the TIP sensor back up or does that have anything to do with pcm controlled boost?

1fast4 · 11-17-2008, 03:20 PM

bump. does anyone know if i must reconnect the TIP sensor for this to work correctly?

lopez · 11-17-2008, 05:47 PM

I tried it, didn't work either. even with the waste gate backed out completely and then adjusting for more boost. The power felt great at the top but couldn't get past the lag. I think it works great but for the stock wastegate.

1fast4 · 11-18-2008, 08:24 AM

well i hooked up the TIP line and the whole thing was a bust. i kept throwing a 2074 code so i just unhooked the TIP again and put it back to how i had it originally. i guess i will have to just deal with full boost in the first two gears unless someone else has any ideas.

KBizzle · 11-18-2008, 08:43 AM

i believe the spring in that kinetic wga is too strong to run off pcm boost, you would have to loosen it so low that the flapper would rattle, which in turn would drive you crazy!

1fast4 · 11-18-2008, 10:43 AM

Quote: Originally Posted by KBizzle

i believe the spring in that kinetic wga is too strong to run off pcm boost, you would have to loosen it so low that the flapper would rattle, which in turn would drive you crazy!

yeah i already did that and i had to back it off so far to get the boost i wanted that the flapper was constantly open and it took it until 4k to build full boost. when i first got the wga, i was completely stock and i couldn't get the thing to boost above stock until i did the vacuum rewire, and now i can't get the boost low enough. talk about irony, this thing is starting to get annoying but not enough to get rid of the car.

1fast4 · 11-18-2008, 04:15 PM

bump ttt

1fast4 · 11-19-2008, 10:06 AM

anyone? i would really like to get this problem figured out so i can run on pcm and get at least a little bit of traction in 1st and 2nd.

KBizzle · 11-19-2008, 10:09 AM

Quote: Originally Posted by 1fast4

anyone? i would really like to get this problem figured out so i can run on pcm and get at least a little bit of traction in 1st and 2nd.

what else are you needing to know man? i just ordered the FM wga, i read a lot of good stuff about it on PCM controlled boost!

1fast4 · 11-19-2008, 12:22 PM

well right now since i can't get the problem i have figured out, i have the vacuum lines so that none of the solenoids are being used. i tried connecting the wga solenoid and the TIP sensor solenoid back up but to no avail. with the wga set to where it just barely sits on the flapper arm and just the wga solenoid connected, the boost goes to 28psi. with both the wga and TIP solenoids connected, i throw code 2074. i have a map clamp on but that shouldn't matter because when i throw the code, i'm not even in boost. i reset my pcm multiple times with the same outcome. so what i am wanting to know is how i can go back to pcm controlled boost only? the way i reconnected the solenoids follows the diagram on the hood so i don't know why i am getting the problems i am getting when i try and reverse the vacuum line rerouting. when i first bought the wga and put it on the car, i was pretty much stock, all solenoids in use, and so on. i couldn't get the car to boost more than about 15psi. now when i try to go back to stock, sort of, i can't boost below 20psi no matter how loose i have the wga.

i do have a map clamp, so can i just 't' into that and run wires to my TIP or am i going to have to build another clamp dedicated to the TIP?

KBizzle · 11-19-2008, 12:26 PM

the pcm "learns" boost. you may just need to drive it around a few days getting in and out of boost a little until the comp can learn the boost...

1fast4 · 11-19-2008, 12:58 PM

i know that the pcm learns boost but if i connect my TIP sensor i pretty much automatically get a 2074. i need the TIP sensor if i want the computer to control boost right?