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Old 05-31-2011, 02:04 PM   #15
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Smoke machines were invented to stop stumbling around in the dark when it comes to vacuum and emissions leaks. If you CAN find it with a visual inspection or carb clean...then a smoke machine can find it in about 1% of the time that you would spend doing it the 1984 way.

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Old 05-31-2011, 02:12 PM   #16
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Quote:
Originally Posted by hypurone View Post
As simple as crimping shut the supply line to it at the manifold end...
But the vacuum comes from that end. Wouldn't I need to do that from the other end? And how could I do it. I'd have to get behind the firewall right?

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Smoke machines were invented to stop stumbling around in the dark when it comes to vacuum and emissions leaks. If you CAN find it with a visual inspection or carb clean...then a smoke machine can find it in about 1% of the time that you would spend doing it the 1984 way.

I'll have to check that out. Any idea of a known shop?
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Old 05-31-2011, 02:32 PM   #17
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Any shop worth a hoot will have a smoke machine.....look for one that has a reputation for working on more modern stuff or being a good diagnostic shop....but it's a pretty common tool for a commercial repair garage to have.

All it is a machine that literally creates smoke. You can plugin to your vacuum system and hit the button....watch for smoke. You can add dye and use lights etc to find tiny leaks....it's pretty cool tool.
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Old 05-31-2011, 02:37 PM   #18
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Maybe I should start smoking again and use a cigarrete?
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Old 05-31-2011, 02:39 PM   #19
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But the vacuum comes from that end. Wouldn't I need to do that from the other end? And how could I do it. I'd have to get behind the firewall right?
No, the vacuum is generated at the intake manifold/maggie and fed to the booster via the line. You want to crimp it shut at the manifold end to eliminate the booster, line and check valve. If that identifies the prob, then you can work your way down the line to see what component is the prob. Capiche?
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Old 05-31-2011, 02:40 PM   #20
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what he said sorry got a lil busy
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Old 05-31-2011, 02:42 PM   #21
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No, the vacuum is generated at the intake manifold/maggie and fed to the booster via the line. You want to crimp it shut at the manifold end to eliminate the booster, line and check valve. If that identifies the prob, then you can work your way down the line to see what component is the prob. Capiche?
So, if there is no change when I do that. Then it's NOT the check valve at the brake booster?

I took the hose OFF of the valve at the brake booster and plugged the hose with my finger. It was still missing. So I guess that's the same thing.
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Old 05-31-2011, 02:46 PM   #22
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So, if there is no change when I do that. Then it's NOT the check valve at the brake booster?

I took the hose OFF of the valve at the brake booster and plugged the hose with my finger. It was still missing. So I guess that's the same thing.
Sort of, you were downstream of the check valve so technically it could still be the problem... Crimp it upstream of the valve or remove the valve and plug the line to be sure.
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Old 05-31-2011, 02:52 PM   #23
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Sort of, you were downstream of the check valve so technically it could still be the problem... Crimp it upstream of the valve or remove the valve and plug the line to be sure.
The L99 doesn't have the canister. Only the fitting that plugs straight into the firewall. I suppose I could pull it out and plugg it from there, with my finger. That would work, but since I still have the problem plugging the hose at the blower, I guess I'm ok?
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Old 05-31-2011, 03:58 PM   #24
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The L99 doesn't have the canister. Only the fitting that plugs straight into the firewall. I suppose I could pull it out and plugg it from there, with my finger. That would work, but since I still have the problem plugging the hose at the blower, I guess I'm ok?
Yeah, sorry. I misread your post. If you disconnected the hose on the intake side of the check valve you should be good at that area then...
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Old 05-31-2011, 04:38 PM   #25
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Are you seeing any CEL codes? Typically with any VAC leak you'll get a CEL especially if it's bad enough to cause the engine to idle erratically.

Is it just a bad idle (erratic) or are you sure it's a true miss of the engine?

Did you post up video?
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Old 05-31-2011, 05:20 PM   #26
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man this sucks Randy.....hope you figure it out

i think your new nickname is Schleprock from the flintstones... remember him?
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Old 05-31-2011, 05:21 PM   #27
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Quote:
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Are you seeing any CEL codes? Typically with any VAC leak you'll get a CEL especially if it's bad enough to cause the engine to idle erratically.

Is it just a bad idle (erratic) or are you sure it's a true miss of the engine?

Did you post up video?
I did post a video. Let me go get it and post it here.


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man this sucks Randy.....hope you figure it out

i think your new nickname is Schleprock from the flintstones... remember him?
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Old 05-31-2011, 05:25 PM   #28
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