After market wastegate and aftermarket boost controller help fast!

[pj91gsx]

I need help. My friend car is skipping. Could it be a boost leak? Also the Air fuel ratio gauge moves all over the place. Would the o2 sensor be bad if it moves all over. I am trying to figure out to set stock boost on it. I turned the boost controller all the way down. Would that set stock boost in terms of the car having a turbonetics external waste gate? Thanks, austin.

 

[turbosax2]

I don't understand why people ask "could it be a boost leak?". Do a boost leak test and find out for sure, no guessing at all. Even if the boost leak isn't the problem it's still good to do a test once in awhile anyway.

If you turned the boost controller down all the way, then that is the lowest possible boost you can run without changing the wastegate spring.

Oh, and what does "skipping" mean?

 

[pj91gsx]

This is a different motor. what I need to know is with an XS power boost controller and a Turbonetics Wastegate, would turning the boost controller all the way down make stock boost? The A/F gauge says rich at idle and sometimes it moves to lean. but mostly rich.

 

[turbosax2]

Turning the boost controller all the way down will not make "stock" boost. It will make however much boost the wastegate spring is. What spring does he have in the wastegate?

 

[pj91gsx]

when driving the car the boost level gets to its max 0. and the needle bounces and the car wont increase speed. like its miss firing.

 

[turbosax2]

Do a boost leak test so you can rule that out as a possibility.

 

[absolute_DSM]

The A/F gauge says rich at idle and sometimes it moves to lean. but mostly rich.

Are you actually going to think an "A/F gauge" is accurate? Slap a wideband in there and youll know for sure.

 

[pj91gsx]

I dont know what kind of spring is in it for sure. Is it possible to not have a spring in there? Because the car is pretty slow it feels like about 3 lbs of boost and the boost gauge reads 0. the BOV is very quiet. The turbo is a T3 just rebuilt.

 

[turbosax2]

Ok, if you're not going to do a boost leak test first then we need more information.

Other mods done to his car
Last time he did a boost leak test
Did this problem just happen one day or did he buy car this way?
Did it ever boost properly?
etc.
etc.

 

[absolute_DSM]

Boost leak test it!

 

[pj91gsx]

he bought the car two years ago. it had a blown xspower turbo.

 

[turbosax2]

And the answers to my other questions....?

Eric's still say boost leak test first, then go from there.

 

[pj91gsx]

we put a another turbo on there and it worked great. I told my friend to turn down the turbo XS boost controller all the way down to be safe that it wasnt boosting a lot more than what is safe

 

[pj91gsx]

when we first put the turbo on, the bov was very loud and I dont know how much boost it was pushing. btw the car sat for 2 years and now we are starting to work on it.

 

[turbosax2]

So with the boost controller all the way down, it doesn't boost at all and misfires?
And with the boost controller turned up, it boosts fine and doesn't misfire?

 

[pj91gsx]

How do you test for a boost leak?

 

[snowborder714]

Do a boost leak test. It's not hard and will take only a few minutes to find out about any major leaks.

What turbo did you put on?
What else is done to the car?
Do you have an aftermarket boost gauge or just the stock one? If aftermarket, which vacuum line did you tee into?

 

[turbosax2]

How do you test for a boost leak?

Now we're getting somewhere!

http://www.dsmtuners.com/forums/art...-boost-leak-test-how-boostpro-net-tester.html

 

[snowborder714]

Follow the above thread.

Here's another way to build a boost leak tester:
IC Pipe Tester

 

[pj91gsx]

The boost gauge is t-ed into the line off the Bov. it is a blitz bov. garret airesearch T3. with turbonetics external wastegate. and a tubular manifold

 

[snowborder714]

The boost gauge is t-ed into the line off the Bov.

You should tee that into the FPR line. The line from the bov to the intake manifold should be one solid line with nothing teed into it.

 

[pj91gsx]

ok thanks. i thought that was wrong. Its right on my car then.

 

[pj91gsx]

I left out a very important detail. when my friend first got his car his grandpa put the battery recharger cables on the battery backwards. It blew the transistor pack. Now that I thought of it the problem could be the ecu. Today we tried different spark plug wires. and thats it. I really think it has something to do with the boost controller setting though. btw. will a 1g ecu work with a 2g? I only have an extra 1g ecu.

 

[pj91gsx]

How do you hook up the vacuum lines to a Turbonetics Deltagat Mark II Wastegate?

 

[pj91gsx]

It turns out. The vacuum lines for the wastegate were hooked up wrong and the welds for the bov were bad so it was leaking there and it was leaking on a pipe off of the turbo. Thanks you guys.