Quick question about wastegate actuator
- Thread starter dirtysouth_msp
- Start date
dirtysouth_msp
Member
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- 2003.5 Blazing Yellow MSP (Forged)
Well, a vac leak or leak in the intake track after the MAF can definitely cause a lean condition. It would kinda suck if you paid for new injectors and there was a leak the whole time causing the lean condition.
Since you say that you were only seeing about 10 in Hg of vac at idle, I would bet that it is a vac leak rather than a leak in the intake track.
EDIT: What mods do you have that are causing you to so desperately need your Unichip tuned?
Since you say that you were only seeing about 10 in Hg of vac at idle, I would bet that it is a vac leak rather than a leak in the intake track.
EDIT: What mods do you have that are causing you to so desperately need your Unichip tuned?
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Ok spoke with them today, there was no leak my gauge was bad so i am going to have to buy a new gauge, he said its off by 6psi and when you shut of the car it stays at around 5-7psi.
My mods are as follows, AEM CAI (MODIFIED INTO SHORT RAM), Hiboost FMIC, 3" no cat full exhaust from apexr1.com, and Unichip
My mods are as follows, AEM CAI (MODIFIED INTO SHORT RAM), Hiboost FMIC, 3" no cat full exhaust from apexr1.com, and Unichip
dirtysouth_msp said:
dirtysouth_msp
Member
- :
- 2003.5 Blazing Yellow MSP (Forged)
OK, yeah if your guage is not zeroing out when you shut off the car, then something is definitely wrong with it. Funny thing is, the guage was the first thing I tested when I noticed a vac reading of 10 inHg, but mine was My prob was as stated earlier in this thread.
Hmmm, I am not 100% certain without searching, but I believe that there are other people running Unichip with similar mods without the need for bigger injectors. You may want to try talking to JDMSam, as he has experience tuning the Unichip for MSP's.
The only thing different between your and my setup is your intercooler and I have a high-flow cat. I have Injen short-ram, Vibrant exhaust and Unichip.
Hmmm, I am not 100% certain without searching, but I believe that there are other people running Unichip with similar mods without the need for bigger injectors. You may want to try talking to JDMSam, as he has experience tuning the Unichip for MSP's.
The only thing different between your and my setup is your intercooler and I have a high-flow cat. I have Injen short-ram, Vibrant exhaust and Unichip.
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Velocifero
Wham Bam thank you Ma'am
- :
- VRM MS6, Sunlight Silver MSP
honestly you shouldnt need those injectors yet, but if you want to go higher then I would suggest them for sure, at this level you will just be dumping fuel. I am similar to Rob but no unichip, a couple extra goodies he doesnt have though.(enguard)zzMSP03.5 said:
They said it was just running lean at any setting, and the car gets to a certain rpm on the dyno and just almost stalls, i know cause thats what it was doing when i took it to the dyno it was doing the same thing... builds boost then starts sputtering and almosts stalls then picks back up again. He said the only thing that can fix it is the
Velocifero said:
I still dont have the car back yet, they ordered new injectors... they said that Unichip explained from my mods and the way the car was running that bigger injectors are the only fix. They replaced most of the lines, i had them inspect the whole engine and they had to replace some lines. Honestly i trust what they are doing, i mean they had a full race BMW M3 they were putting a Unichip on in the shop... they work with a lot of turboed cars and are the only certified Unichip shop near me.
Actually it ran horrible, i could tell it was running real lean and at idle it was so rich you could smell it. I dynoed it and it wouldnt finish a pull, it would sputter and almost stall.
Actually it ran horrible, i could tell it was running real lean and at idle it was so rich you could smell it. I dynoed it and it wouldnt finish a pull, it would sputter and almost stall.
JDM Sam said:
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a lil bit of old thread bumpage...
My wastegate appears to be bad. My vac reading is usually about 17, which doesn't seem as bad as most people, however i'm having the same idle and stalling issues described earlier, and when i blow into the line to my WGA, air goes through. When i pulled the entire vac line off, it holds air.
I'm still under 50K miles, so i'm trying to decide if i should try to take advantage of my warranty (with some parts swap outs), or get this piece. I would be a little concerned about boosting too much, though, since i don't have EMS. Right now i get a spike to about 9, and hold at about 7.5-8. I don't really wanna go higher than that till i get some EMS....
anyone got some suggestions??
My wastegate appears to be bad. My vac reading is usually about 17, which doesn't seem as bad as most people, however i'm having the same idle and stalling issues described earlier, and when i blow into the line to my WGA, air goes through. When i pulled the entire vac line off, it holds air.
I'm still under 50K miles, so i'm trying to decide if i should try to take advantage of my warranty (with some parts swap outs), or get this piece. I would be a little concerned about boosting too much, though, since i don't have EMS. Right now i get a spike to about 9, and hold at about 7.5-8. I don't really wanna go higher than that till i get some EMS....
anyone got some suggestions??
jmv said:
I installed this piece and I remained at stock boost. I noticed were saying that they went from boosting 6 to 8 lbs but I didn't notice a difference. I wish it would have gone up since I have plenty of supporting mods to boost to 8 or 9.
Velocifero
Wham Bam thank you Ma'am
- :
- VRM MS6, Sunlight Silver MSP
I'll wait for dirty south to chime in, he has dealt with this a couple times, I haven't, but I think you should be fine swapping out with the boost situation, since you are already boosting higher than stock I dont think you will see a large spike off this mod and you should still be under 10 psi.jmv said:
dirtysouth_msp
Member
- :
- 2003.5 Blazing Yellow MSP (Forged)
jmv said:
Your WGA is bad, replace it.
dirtysouth_msp said:
well yeah i figured it was... i was hoping more for suggestions as to returning to stock and using warranty at the dealer, or going with the ATP wga....
It sounds like you might be the best person to help me with that decision, so if you've got a reccomendation i'd love to hear it.Just a fyi. I've been running the atp wga for a lil over a month now with success, and I started getting the old symptoms back. The turbo is not building boost until 4k rpms and not building at all in fourth and fifth gears. So that would lead me to believe that the wastegate itself is toast. I did notice during the install of the atp wastegate that the flapper arm was pretty sloppy and would almost stick. But being a turbo newb I just went ahead with the install. Sorry to bump this thread as I could have started a new one, but if the wg itself is bad can it be fixed. Or do I have to write the turbo itself off? thx
I had the same problem. The flap was sticking to the side and not closing. I took the turbo off and bent the arm the flapper is connected to away from the turbo casting and now I have instant boost. I don't know if this is the best solution but I figured what the hell. I have no warranty and you can't really just replace the wastegate. Just weld it shut and go external wastegate. Who knows, but it worked for me.
Also, I helped a local forum member with the same boosting issues. Took off the turbo and did the same trick. His car has been running great ever since and it's been a few months.
Also, I helped a local forum member with the same boosting issues. Took off the turbo and did the same trick. His car has been running great ever since and it's been a few months.
Well, i got it in and its great. Install went fairly well, it does take some small hands though. I even managed to re-use the stock clip. Anywho, the car feels wonderful, the idle problems are gone, no more stalling after letting off the gas, and it holds boost rock steady at about 7.2 psi (of course thats an estimate, but its a hair over 7). Before i had spike to 9, hold at 7.5-8, so this has actually lowered the boost some, but it got rid of the spike which is a good thing. My vac reading is still somewhat high.... i think i blame this on the gauge though. It feels like it sticks a little in the higher vac readings, and i don't think it has enough 'umph' to get past it. Anywho, i'm real happy, i mean REALLY happy that i've finally figured out the problem behind my car and gotten it fixed. Thanks for helping me diagnose the problem, AND for helping me find the solution!!
