I've had a problem after installing a FAST 92. Everything is hooked up. I did the Spin mod to it. Can someone point me where to start looking. I bypassed the hard black plastic line that runs along the intake and I thought that fixed it. Light didn't come on for over a week. Drove it 1,000 miles to have Chuck tune it. Now it's coming on again. Autozone code reader stated it was a vaccuum leak. Intake is torqued down. Could it be the FAST mod I did?

 

did you change the bolts on the valley cover? if you didn't, when you torqued down the intake, you probley cracked the bottom.

by the way, i can't resist. did you check the gas cap? LOL

i have the fast92 on and dont have that problem. im not familiar with any black plasic line, but it was 6 months ago since i did the mod. (so i can maybe say, try to undo the bypass you did).

hope any of this helps..

-carl

 

Two options:

Send it to me and I will check and fix it. One of the things I do to my manifolds is a reseal. Long ago (6 years) the FAST was plagued by vacume leaks and people lost power when they installed them. Back then I identified all the leak areas by taping up every single opening and injecting pressurized smoke into the vacume brake line and saw where it was escaping. I thought I was in a horror movie when I saw a dozen leaks.

I seal each and every manifold against this now and advise people not to open them when I ship them.

You can also have a leak at the mod section if you didnt use a pliable adhesive like GOOP.

Option 2 is pay for my travel and I will go there for free and fix it.

 

More than likely one of the purge lines are not seated properly. The purge lines are the hard black lines that run to the solenoid near front pass cylinder head. Most often its loose at the firewall connection.

Phil

 

Shot in the dark here but did you cover the rear vacuum port on the passenger side of the manifold? LS1's use that port for a vacuum line but it has to be covered for our cars.

 

I've bypassed the purge lines. I'm using the rear vaccuum port for the mild to wild switch.
I took the manifold apart and peeled the Purple Goop off of the inside of the mod, sanded it down, and re applied Purple Goop on the inside. Cleaned and re sealed the intake. Going to put it back on shortly. I appreciate all of the help offered.
PS
If this doesn't work, Spin you'll be getting a package in the mail. With me begging for help.....

 

$900 and it leaks? smoke test? this is the best out there?

 

it would be a very nice addition to you quick lift rr's

 

I cut up the $900 intake. It's possible I didn't seal it completely when I did it. I hope it was due to my work and not a bad intake. Since it has no warranty now......

 

Did you torque it to the specified torque???
If you opened up you most likely have a leak, reseal it.
and test it.
did you install the round headed bolts for the valley??

 

Torqued to spec. Changed valley bolts. I am waiting on the re-seal to dry so I can re-install the intake. What has thrown me off is that I got the Check Gas Cap right after install. Then I removed the purge line from the firewall and replaced it with a rubber hose. It worked for a little over a week. I drove it 1,000 miles so that Chuck (COW) could dial in the tune. Now it popped back up. So to took the intake apart now and cleaned it up. Re-sealed it and I'm going to check it again.

 

when you open it up and don't seal it up properly of couse it's
going to leak!!!
they check them after assy, if you break the seal then it's on you!!
And that is the best out there.

 

Good luck!!

 

There's a recall on the gas cap. I had mine changed at 17,000 miles.... no problems since.

 

Welocme to the world of modding. If such issues bother you, stay stock which I see in your profile is pretty much where you are. The issue as I said, was 6 years ago when it first came out. The leak issue bothers you and yet you bought a car plagued with quality control issues. The roof delanimates, the rear diffs crack, the gas tank jumps around unable to read the level if you have 1/2 a tank, the pressure sensors in the wheels are off 10%, the trans fights you going into first gear at a red light, and our favorite; the battery dies on an 05 if its not parked in reverse.

No one reports FAST leaks now unless they pop the thing open and dont know what they're doing. Most people who read my thread on how to mod the FAST ignore the reseal point and many dont think its something of importance when I stress that I do this in the price quote.

What I do to develop a mod isnt an issue to any customer. You buy a fully prepped manifold and put it on. Not a single one of the tripple digit FAST manifolds that I prepped ever had a leak. I have even redone a few botched up by other tuners.

Why do people have an issue with a mod that produces 30hp and 30rwtq under much of the power band when a set of headers makes nearly the same power and costs two times as much? An even better question is why people will drop 1400 on an exhaust that makes 2HP and then bash this part that makes power? I'm lost.

Buddy, PM sent.

 

LOL, you can cut this manifold in 1/2 and send it to me and the resulting unit would work 100% fine. There isnt anything that can be bad on it. You likely have a leak which is the simplest of all fixes.

 

 

[B][
What I do to develop a mod isnt an issue to any customer. You buy a fully prepped manifold and put it on. Not a single one of the tripple digit FAST manifolds that I prepped ever had a leak. I have even redone a few botched up by other tuners.
/B]
I sent Spin my 92mm Fast that was botched by another tuner
and he returned it Fixed of all problems.

 

I wouldn't jump to conclusions that the mod and the gas cap message are related. I just got the same message a week ago and I haven't installed a FAST... yet.


---Matthew Hicks

 

Let me help you find your way. Let's see. As you know, I paid $1,191.00 for a Fast 92 + Spin Mod. My Kooks #6600-EX headers with Kooks #61550C Hi Flo Cats and Jet Hot Coating (in and out) cost me $1,150.00 shipped from Maryland Speed and I installed it myself. So exactly where does the "cost (2x) two times as much" comes from, I wonder? Math class again says $1,191 less $1,150.00=$41 bucks less than a SpinFast 92. Not even close to 2X, eh? Needless to say, I still have my Kooks headers and you know I no longer have my Fast.

So far as the $1,100-$1,800 for catback exhaust-NOBODY but nobody buys them for the 2-6 bs hp. Its for "the sound, man"! For lots of folks, the deep thunder exhaust tune (over the wimpy stock exhaust sound) is more important than the power! You dig?

Oh, very generous to help the OP out