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Old 01-15-2016, 01:50 AM   #5961
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Vacuum gauge shows around 16-18, but dropping below 10 when its almost dying.

I'll get more carb spray tomorrow. Also going to pull the carb again and clean better.

Idk where a vacuum leak could have appeared but I'll search harder.
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Old 01-15-2016, 01:53 AM   #5962
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Originally Posted by aidandj View Post
Vacuum gauge shows around 16-18, but dropping below 10 when its almost dying.

I'll get more carb spray tomorrow. Also going to pull the carb again and clean better.

Idk where a vacuum leak could have appeared but I'll search harder.
Carb spray is also good for finding a vacuum leak.

Loosing vac when it's dying makes me think it's a vac leak.
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Old 01-15-2016, 01:56 AM   #5963
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Megasquirt. You know you want to.

--Ian
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Old 01-15-2016, 02:30 AM   #5964
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Sent you a pull request. I should really work more on my miata website
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Old 01-15-2016, 06:58 AM   #5965
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A vacuum leak is most likely problem if it's not a pump and you've already rebuilt the carb.
Agreed. But I still maintain it is a fuel problem, and that means pump if it's not the carb itself. Your float bowl level is dropping, and that's starving it. Find out why.
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Old 01-15-2016, 09:36 AM   #5966
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What did it do before the carb rebuild?
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Old 01-15-2016, 09:42 AM   #5967
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Sent you a pull request. I should really work more on my miata website
I rewrote that line twice, and aidan keeps putting it back lol
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Old 01-15-2016, 09:54 AM   #5968
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Agreed. But I still maintain it is a fuel problem, and that means pump if it's not the carb itself. Your float bowl level is dropping, and that's starving it. Find out why.
I checked that. I can push down on the float and it fills back up.

It was similar but different before the rebuild. Black smoke, coughing, wouldn't Rev. Super rich.
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Old 01-15-2016, 12:41 PM   #5969
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Megasquirt.
As soon as someone shows me an off the shelf crank trigger that does not require me to cut up the factory harmonic balancer AND shows me a way to get cam position without using the distributor, I'd entertain it for my FE

(inb4TurboTimand$1,200Jeselsolution)

Until that (never) happens, I bought this: Summit Racing® M2008 Series Carburetors SUM-M08600VS and this: Carter Universal Rotary Vane Electric Fuel Pumps P4070. I had one of these Carters run for 10+ years on my Mustang with no regulator. If I hadn't dropped it I'd still be using it.

Because while I love my Autolite 4100, I need something that is tune-able with off the shelf parts that were not discontinued in 1970.

Aidan: I'm also guessing fuel pressure at this point. Do you have a simple T and a gauge you can plumb in?

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Old 01-15-2016, 12:57 PM   #5970
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Change out your pump.
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Old 01-15-2016, 01:12 PM   #5971
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fuel pump ordered. i only have pressure tranducers not a gauge.

gonna go install the new ignition stuff and clean out the carb better
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Old 01-15-2016, 01:13 PM   #5972
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Also going to swing by HF and get this and this

Inline Ignition Spark Checker

Fuel Pressure Tester & Fuel Injection Pump Tester
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Old 01-15-2016, 01:14 PM   #5973
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Of course right as I tell 18psi to come back and that were on track more often we go off and do truck stuff.

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Old 01-15-2016, 01:15 PM   #5974
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I have a holly double pumper at home I could lend you if you don't get it figured out.
What type of intake manifold do you have?
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Old 01-15-2016, 01:18 PM   #5975
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I have a holly double pumper at home I could lend you if you don't get it figured out.
What type of intake manifold do you have?
Stock
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Old 01-15-2016, 01:19 PM   #5976
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Nevermind then. It's a big *** 4 barrel deal.
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Old 01-15-2016, 01:32 PM   #5977
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Fuel filter?
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Old 01-15-2016, 01:45 PM   #5978
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I dont think its fuel starvation. I just drained all the fuel, line was empty. Tried one crank to get it to fill up. Cue geyser of fuel coming out of the carb (no top plate)

Thank god it didnt start.
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Old 01-15-2016, 01:46 PM   #5979
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Fuel filter?
This. Was just coming here to post the same thing. Also, make sure your fuel lines aren't crimped or leaking
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Old 01-15-2016, 01:48 PM   #5980
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This. Was just coming here to post the same thing. Also, make sure your fuel lines aren't crimped or leaking
See post about fuel geyser hitting hood
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