SC Install resulted in 50 more HP...suggestions needed

imazman

The car isnt pinging but seems to be lagging or resticting...may be in limp mode. I did a normal drive and recorded data. On normal drive everything seems normal except Knock Strength went up to 27000 and MAP was always 0v. Checked the MAP connector and it was fine, the looked up my PLX gauge and had it report MAP and it reported fine. So Uprev's new RomEditor software version broke the MAP reporting.
My mechanic said he bets it is bad or stale gas...and it did start right after I bought 93 at a Sheetz and it acted really bad on the warm day. I find it hard to believe stale gas would behave that radical but I will try to run the bad gas out on these cooler daysand if I cant run it all out I will open up the tank and siphon it out.

When I am confident it isnt a damaged engine I will get it retuned.

Chuck33079

If you want to know if the engine is ok, have a mechanic (preferably a new one, your guys sounds in over his head) perform a compression test and leakdown test. Send an oil sample to Blackstone labs to check and see if there's accelerated wear.

And if knock strength goes up that high, are you sure it's not knocking badly? That won't end well.

Going forward, only buy gas at name brand top tier gas stations, preferably ones with a large enough volume of nice cars so that the 93 tanks get turned over frequently.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

scope22

Just need to get a good tuner to retune it and you should be fine. High knock will make the ECU go in to 'bad gas' map and it will run like ****, just need to retune it. this happened to me also, had high knock, after 30 mins of driver it would run rough.

Chuck33079

Hopefully it's just squirrely because of Stillen's funky tunes. 90% chance a good custom dyno tune will clear it right up. He just needs to make sure nothing else got toasted in the process.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

Jayhovah

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2013 Gun Metallic Sport - Gamma V3 Twin Turbogized
DIY Gamma V3 TT Install * Jayhovah's Gamma V3 TT Install Pic'Z and Vid'Z * DIY: Washer Reservoir for the Boosted

imazman

I am hearing a loud high pitched sound coming from the stillen plenum! It is easily heard after I turn engine off and turn the accessory on so the pump runs. It is not the pump as I can move my ear around the engine bay and it is DEFINITELY coming from the plenum...and yes the pump is running and making turbulance in the reservoir. I'm guessing its either the heat exchanger or the MAP sensor...I dont think there is much of anything else. Oh and when I turn off the accessory I hear a really loud click....like a relay turning off and then it is silence. I grabbed a video of the sound, I will try to post it.

I searched for high pitched noise on hear but only found cabin noise...definitely not that.

I not sure I know of any good mechanics around hear so I might see what the dealership is willing to do.

Here is a link to video...sorry it 80M but its very loud...flash is turned on after about 10 seconds.

https://drive.google.com/file/d/0B1x...w?usp=drivesdk

/Z/

Chuck33079

The dealer will be willing to misdiagnose your problem and send you on a wild goose chase. Find another shop, even if you have to throw the car on a trailer and take it a couple of hours away. You WILL have a better experience.

Are you sure that noise wasn't there before the sc installation? Your description sounds a lot like a noise that's supposed to be there.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

imazman

@Chuck
Thanks for the word of caution with a dealer, I was kind of worried about that too given they dont do SCs much...if at all.
I am 95% confident it wasn't there...at least not to that loudness. It actually hides the whine of the actual super charger. I recall upon first installation the SC, the whine sounded exactly like a tubine jet engine spinning up...now I just hear this loud noise that sounds like microphone feedback.

I will wait a day or two to see if other Stillen SC owners say they hear the same or not. I almost haveall the "bad" gas run out. One more day of granny driving around should have it out.

Chuck33079

If it's bad gas that's your problem. I'd put the car on a shelf until you have a competent shop diagnose your problems. If it's a bad tune, you can end up doing a lot more damage in the process.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

imazman

Yea, I doubt it is just bad gas since the high pitch noise has nothing to do with a running engine. I fact, if I turn on accessory when car wasnt run...the sound is not there.
It only is after I drive the car do I hear it. Almost as if the engine is still under pressure from the drive. And after the drive and engine is running I can hear it over top of the engine noise...I just turn off engine and turn on accessory in order to hear exactly where it is coming from.

imazman

Any one know of a good SC mechanice near Reading PA. I know RT Tuning is up near Allentown...that is kind of farand I'm not sure if they service or just tune but they charge $100 hr which is too steep for my poor butt.

/Z/

Chuck33079

Are you sure it's not the throttle body noise? They whine after shutdown, and then you hear a click.

RT Tuning is good. They'll solve your problems. $100/hr is pretty standard for shops. Boosting a car that came from the factory NA costs more than you initially budget. If you can't afford to have a good shop look the car over and tune it, you sure as hell can't afford not to. A replacement shortblock is LOTS more money than a few hours of diagnosis and a good tune.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

Jayhovah

$100/hr is what you will pay at almost any competent shop.

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2013 Gun Metallic Sport - Gamma V3 Twin Turbogized
DIY Gamma V3 TT Install * Jayhovah's Gamma V3 TT Install Pic'Z and Vid'Z * DIY: Washer Reservoir for the Boosted

jwick

And that's for normal mechanic work. We pay $125/hr for somebody to do high end diagnostic work around here.

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ChaseZ

Never heard a sound like that electrical feedback or whatever you want to call it. Does it go away when the car is turned on instead of just accessory position? The only Relay in that coolant system is the one that is under the cover by the master cylinder. I assume you can hear the pump running since you said the coolant is circulating. You'd be able to trace the noise to it if that were the problem I'm sure.

MAP sensor is the only electrical thing like that at the plenum. Now if it could somehow make that noise if it was faulty or not I couldn't say but mine sure as heck doesn't. Spend a little time to check all your grounds as well to make sure they are good. What about the MAF extensions? Whatever that is it sounds electrical for sure so I'd start with all those things. Anything that changed electrically when the blower was put on.

What PLX sensors do you have and where are they tapped/installed.

What injectors are you running and are there harness adapters?