warning: possible stupid question

[snowboarded]

I was just thinking of an issue that I have. I have been over boosting for a while and hitting fuel cut whenever I get on it hard. I am going to replace all the vaccum lines in the next week or so and hopefully that fixes it.
But my question is if that doesn't solve it, can I install an EBC and have that take care of the issue? I figure that since it controlls how high your boost will go, it also can limit how high it goes, acting as a FCD. Am I way off or is this possible?

[sammydafish]

nope, that's not how it works. replacing vac lines won't help you either. Fuel cut is controlled by the signal the MAP sensor gets. You need to limit the boost the sensor gets with a regulator valve.

There may be other ways to do this also, search and ye shal find.

[vrg3]

While you might be able to figure out a way to hack an EBC into an FCD, why would you use a $014339504389.99 boost controller as a fuel cut defender when you can just come over and get my help installing an FCD that costs less than a cheap meal?

But also, shouldn't you fix the overboosting problem?

I have an MBC I'm no longer using that you can have if you come get it.

[free5ty1e]

Umm... did you say you were over-boosting? As in, wastegate actuator unconnected or with leaky hose?

That is no good. Do you have a boost gauge?

Immediately get a new vaccuum line and run it between your turbo compressor outlet nipple and your wastegate actuator directly. You'll get minimum boost, 6psi, and can calmly figure out how to either fix the stock boost control system, or add your own manual or electronic boost controller.

[snowboarded]

While you might be able to figure out a way to hack an EBC into an FCD, why would you use a $014339504389.99 boost controller as a fuel cut defender when you can just come over and get my help installing an FCD that costs less than a cheap meal?

But also, shouldn't you fix the overboosting problem?

I have an MBC I'm no longer using that you can have if you come get it.

I'm definately coming over for help with the FCD. I'll bring some friends with me like Jim and Jack and Jose.

I already have an EBC, that I need to put in and have been dragging my feet on. This is just more motivation to get that done also.
But if I am still over boosting. Won't the fcd will eliminate my only way of stopping too much boost? other than taking my foot off the gas pedal that is.

free5ty1e - I have an autometer boost gauge installed.

[vrg3]

I'm definately coming over for help with the FCD. I'll bring some friends with me like Jim and Jack and Jose.

Haha, nice.

I already have an EBC, that I need to put in and have been dragging my feet on. This is just more motivation to get that done also.

Oh. Are you sure you don't want to sell it and use a free MBC instead?

But if I am still over boosting. Won't the fcd will eliminate my only way of stopping too much boost? other than taking my foot off the gas pedal that is.

Yes, absolutely, and that is an important concern. The FCD removes a safety feature.

So you should fix the overboosting first.

Why is your engine overboosting?

[free5ty1e]

Good, you've got a boost gauge - OK - what boost level are you "overboosting" at?

We're concerned because if you're running as we think you are, with an always-closed wastegate, then your probably boosting above 20psi before fuel cut takes over.

It takes ~3 seconds above 13psi before fuel cut is engaged; plenty of time to overboost and pump some plasma into your engine.

Definately fix the overboosting condition before installing the FCD. Although if you're going to visit Vikash, he'll probably get you straightened out.

What kind of EBC do you have sitting around waiting for an install?

[snowboarded]

MRT. the exact model I forget, will have to check at home. Ive seen it spike in between 15 and 16 before fuel cut.
Could it be the solenoid?

[vrg3]

Wow.

If it's all stock plumbing, it's possible it's the solenoid but it seems more likely to be a bad hose.

[Matt Monson]

Take Vikash's free MBC. I have seen so many guys struggle to get an EBC to work right on this car. The ECU gets involved and fights with the EBC. I was once told to always follow the rule of KISS: Keep It Simple, Stupid. Do not use a tool that is more complicated than you need to do a simple job. This is not a Too Fast Too Furious car. You won't drive around at 9psi until someone revs on you at a stoplight and use your EBC to turn it up to 14psi and smoke them.

And as the others have said, IMMEDIATELY get your boost level down and start trouble shooting. I know it feels like a drag to drive around at 6 psi for a few days, but better that than a fragged block...

[free5ty1e]

Sounds like partial overboosting. I vote for a leaky hose somewhere between the compressor and the boost solenoid.

I'd also start with the MBC, but only after the stock boost control was resulting in a solid ~9psi

[snowboarded]

Thank you Vikash!

and free5tyle, you were right. it was a hose in between the boost solenoid and the compressor. Actually that little union thing was the culprit. It can be seen here;


In V's diagram it is hose M that was unconnected to the union on hose L.
http://www.graphics.cornell.edu/~v/vacu ... vacuum.png

Right now I'm back to stock boost levels. Doesn't feel as fun as 15 lbs for a few seconds but it does feel safe, so it feels good.

[vrg3]

Excellent.

[free5ty1e]

Glad you found the culprit. So many hoses to leak in our cars

[Project_Legacy]

i zip-tied almost all of mine. it works wonders. until u gotta take em off. but hey if u arent taking them off anytime soon then u can do that to keep em from getting loose! mine were always coming loose too.

[vrg3]

Well, the "right" thing to do is to replace the hoses that have become so rigid that they slide off.

But, yes, even with new hoses I also put zipties on all my vacuum hoses. Removing them isn't a big deal with a pair of dikes.