zavi

So my car is trifecta tuned it was tuned when I bought it.. But I've been having this boost issue and it's not the purge selanoid nor any boost leaks, I believe it is the tune. The car runs and drives fine for about 30 seconds. Then no boost. Then if Shut it off while driving and turn it back on I get 30 seconds of boost again... Then it goes back into limp mode. I'm thinking it's the tune. Any ideas.. I heard hp tuners is the way to go I'm not a fan of trifecta tune. It's throwing a p0101...

714ionredline

iTrader: (1)

Well if the car was running fine when you bought it, then the tune might not be the problem. Have you tried cleaning or replacing your maf sensor?

zavi

I bought this car off my buddy when I bought it it didn't run correctly so I got a good deal on it. I change the mass air flow sensor and nothing happened. No boost leaks at all. It's really weird..

ECaulk

iTrader: (6)

Build a boost leak tester. I would almost put money on you have a boost leak with the po101 code

iboost

iTrader: (16)

I believe that Trifecta locks the computer so you are going to at least get a hold of Vince at Trifecta and have him put a stock tune on your computer and unlock it.

zavi

Where is he located at? And no boost leaks I tested it several times and data logged it. And there is nothing...

ECaulk

iTrader: (6)

Tested it as in used a boost leak tester and put 24psi on the system? or tested as in checked the connections?

Data logging does not show boost leaks

zavi

Tested it as In using a tester put the pvc elbow in the charge pipe and ran air through the whole system several times never heard any leaks. It's weird cause when I start the car I get boost for about 30 seconds then I don't. Then I'll shut it off then I do then after 30 seconds I don't...

ECaulk

iTrader: (6)

Did you try a new maf? Did you run your hand around the connections to feel any air? Sometimes its difficult to hear the difference in air going into the system and air leaking the system.

iboost

iTrader: (16)

I believe in Washington state

WOT-Tuning.com

zavi

Yes I bought a new Maf and I checked all couplings and everything... No air leaks what so ever. And wow I'm in Michigan that's far from me.

iboost

iTrader: (16)

Yea I know, but what you do is either call or email him, and what you do is he will email you the tune and you rent the tuning cable then load the tune on to your car and return the cable. Its easy. I used to have Trifecta.

ECaulk

iTrader: (6)

Check you bpv. Tunes dont just go bad randomly

iboost

iTrader: (16)

This. There is something definitely being missed...

You can always just take it to the dealership since you don't have a scanner. Let them run diagnostics on it and fix what they tell you is wrong with it. If you had a scanner or a tuning software you could see MAF frequencies...and if they aren't changing and you replaced the MAF, then the cable is bad and you have a **** wire some where.

zavi

I talked to the guy from wot tuning. He believes it is a Map sensor that Is bad I have gmm1 sensor because of the tune.. Idk what I would do about getting new sensors wouldn't I need a whole new tune?..

ECaulk

iTrader: (6)

No. Check the connection of the map sensors if you have the GMstage1 sensors they have to be either spliced in or a connector is used, replacement sensors can be bought from Crate Engine Depot (vendor on here).

iboost

iTrader: (16)

You can pull the sensors off and see if the little diaphragm in it is blow out or covered in oil. That's caused me problems before. Its just a 10mm bolt to pull out.

zavi

Take these off and check them your saying?...

umrdyldo

iTrader: (1)

Your bottom sensor look F'ed up in the those pics. Is there supposed to be a bolt in that hole? Looks chewed up.

zavi

Alot of oil on this how should I clean it...

ECaulk

iTrader: (6)

MAF cleaner, also check the wiring, its either an adapter plug, wire splice or soldered in

zavi

Maf cleaner on a map sensor I'm cleaning the map.

zavi

I clean the inside of the map were it's yellow... this correct?

zavi

Help how to clean clean my map sensor

colodude18

iTrader: (4)

Yes spray the MAF cleaner in there until the yellow diaphragm is clean. Do that on both sensors. The bottom one is usually the oiliest.