Stock ECU, K&N filter, and it's boosting close to 30psi.

Any ideas on what might be causing this?


(not my car)

The solution: (leak in the hose with the pill)

 

Check all vacuum lines for disconnections or rips.. plus don't be boosting while its screwed up like this.. or you'll be taking the car back to the dealer for a new engine pretty soon

 

holy crap

its not hte KnN typhoon filter is it? idk if it would cause u to boost 30psi, but i know that it screws up cars lol

maybe its a lemon?
or maybe its just one of those super cars from the factory, that already come sup'd up

 

Thanks. Yeah, I told him to stay out of boost. Gotta get it looked at ASAP.


A hose leak would cause it to overboost? Wouldn't it cause it to have less boost?

 

Just a regular drop-in K&N filter.

I don't think it's a lemon. I'll check to see if there's a tear in the hose leading to the solenoid.

 

No. The reason why is because the solenoid must get feedback from the line in order to open the waste gate. If this"feedback" never reaches its full psi then the diafragm on the wastegate solenoid will never move therefore causing the waste gate flapper to never open causing maximum boost.

Carlos

 

Thanks man, that makes sense. I'll take a look at it tonight. Hopefully it's an easy fix.

 

Jez, I didn't even know stock turbo could handle 30 psi..... Must go pretty fast . Anyways get it looked at, you won't be able to drive for long like that.......

And if you're reading this, then you have a boost geauge, maybe it's bad too?

 

Hahaha.

It's a possibility, but we can't replace the boost gauge til next week. Until that happens, I'm gonna check for a tear in the hose.

 

Im 99% sure you have that backwards. My friend has an SRT-4 with a forge wastegate actuator, which, by adjusting you can control boost. He kept throwing overboost codes trying to run a tad bit much boost, and his moronic fix was to reroute all his vaccum lines to exclude the stock BCS. After doing this all he could do was run wastegate spring pressure at 10 psi. Until I gave him my old boost controller. This would lead me to beleive that with a hole in the line, the car would revert to wastegate pressure, not shoot up to max boost. I was also under the impression that the wastegate and boost control solonoid works by keeping the pressure AWAY from the wastegate until it senses that the boost in the vac line has reaced the proper boost level. This is why a boost controller is ethically a bleeder valve. It bleeds off the pressure until X amount of pressure builds up, compressing the spring enough and letting pressure through to open the wastegate.

edit* broken boost gauge is also possible. the same friend with the SRT-4's stock boost gauge was broken, and him attempting to adjust his boost, he ended up running about 27 psi of boost, and didnt realize it until he bought a new gauge.

 

Pull the line going into your wastegate and see what happens.

 

My car is in the shop, and why would I go through all that trouble of pulling my engine bay appart, make him do it.

 

fromWRXtoEVO was right.

Thanks man, that solved the problem.

 

If he kept boostin like that....his car would of knocked/detonated. Definitely would have blown the motor in a week. Carlos to the rescuee

 

Kartarailed,

I respect your opinion,if you want to say that my theory is 99% backward go ahead. Everyone else in this forum will make their own judgement. Please read the post number #13, the guy with the issues says that he repaired the problem by doing exactly what I told him.

"fromWRXtoEVO was right.

Thanks man, that solved the problem."



That is just one guy, I helped many many other evo owners over the phone and PM with their turbo issues with no guessing and nothing but accuracy on my predictions

This is a free opinion forum. For people that have been reading my posts for a while they know I already dealt with many many turbos, in fact 13 turbos cars plus a few other turbo upgrades. Additionally I also have 4 years mechanical automotive vocational school but never pursuit the career.

I am still your friend though

Carlos