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RK82
Member
Joined: 27 Jul 2008
Posts: 168
Location: vancouver B.C
1982 Pontiac Trans Am
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 Posted: Fri May 27, 2011 3:53 pm Post subject: vacuum reading |
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does this vacuum reading seem weird, it kinda bounces around, I can't remember if it did that the last time I hooked up the gauge.
also does this seem like alot of water to come out the exhaust?
it was only idling for like 15-20 minutes, I drove it around before this, water temp was 185-190 |
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aaron_sK
Member
Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton
1987 Chevrolet Camaro IROC-Z
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| Posted: Fri May 27, 2011 3:54 pm Post subject: |
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| Water in the exhaust is just condensation. Coolant in the exhaust is what you want to watch out for. If you're not sure, smell or taste it. |
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RK82
Member
Joined: 27 Jul 2008
Posts: 168
Location: vancouver B.C
1982 Pontiac Trans Am
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| Posted: Fri May 27, 2011 4:08 pm Post subject: |
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| aaron_sK wrote: | | Water in the exhaust is just condensation. Coolant in the exhaust is what you want to watch out for. If you're not sure, smell or taste it. |
it didn't smell like coolant, I am to afraid to taste it |
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Alphius
Peanut
Joined: 05 Sep 2006
Posts: 2429
Location: Grand Mound
1984 Chevrolet Camaro Z/28
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| Posted: Fri May 27, 2011 4:14 pm Post subject: |
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| RK82 wrote: | | aaron_sK wrote: | | Water in the exhaust is just condensation. Coolant in the exhaust is what you want to watch out for. If you're not sure, smell or taste it. |
it didn't smell like coolant, I am to afraid to taste it |
Don't be afraid. What don't kill ya will only make ya stronger, right? 
Bouncing vacuum gauge at idle means a vacuum leak, a misfire, a valve event not happening correctly (overtightened valve lash keeping a valve open) or possibly low compression in a cylinder. Basically, it's just not firing with equal strength all the time.  I've seen that happen from a very badly adjusted idle circuit on a carb as well, either far too rich or far too lean.
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84 Camaro Z28 - LS1/T56
85 Silverado - Low and Slow |
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Quasi-Traction
"I have petals"
Joined: 24 Oct 2005
Posts: 3873
Location: stumptown
1986 Chevrolet Camaro Berlinetta
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| Posted: Sat May 28, 2011 2:22 am Post subject: |
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weird.
I've been having weird intermittent idle problems in spite of new plugs/wires, and checked the oil, popped both valve covers and made sure I checked lash correctly. nothing seems amiss.
The strangest thing is, it will idle fine, but it has this weird dip in idle for a couple seconds, then, its back to normal. when I step out of the car, take the air element off, and plug the air bleeds on the pass side, it idles right, and there's never a dip, even after 3-4 minutes of doing that.
I sure hope I'm not dealing with the valvespring problem that Brandon has been fighting. my cam does have kind of a soft ramp rate so I'm rather doubtful it's that.
I'm choosing to blame the main body of my carb. Baseplate was warped and replaced before I ran it (after a good clean-up) so who knows what the hell happened before that.
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