EGR Valve and Vacuum Stuff - Page 2 - Ford Bronco Forum
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post #21 of 32 (permalink) Old 11-01-2016, 01:28 PM Thread Starter
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Just another question after I install the electric choke on the 2150. Do I have to cap off the carb ports that those two hot air choke lines connected too?
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post #22 of 32 (permalink) Old 11-01-2016, 11:14 PM
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I would say no as it's no going to hurt anything by leaving them open, but it wouldn't hurt to cap them off to prevent dirt from getting there and gumming up the works.

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post #23 of 32 (permalink) Old 03-18-2017, 05:29 PM Thread Starter
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Hey, Can I use this for my choke hot air source?

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post #24 of 32 (permalink) Old 03-18-2017, 09:42 PM
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No, that is intake air. There is an exhaust crossover built into the intake, that ford utilized. As you noted edelbrock did not utilize the exhaust crossover to heat the choke. Cold intake air will not suffice! Go electric, like Schwim said
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post #25 of 32 (permalink) Old 03-18-2017, 09:52 PM Thread Starter
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Thanks, I just purchased the Electric Choke Conversion kit online....
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post #26 of 32 (permalink) Old 03-19-2017, 02:27 AM
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OK - in post #8, picture of manifold, red circle - there is a fitting that goes in there that a vacuum line hooks to for emissions crap. If you've pulled all the emissions junk off your engine, then leave it plugged.

Without emissions crap you will hook your dizzy directly to the vacuum port that is located on the passenger side of the carb just below and slightly forward of the choke linkage.

Vacuum lines that are connected to the vacuum antler at the back of the engine are the brake booster, automatic transmission vacuum line (goes to the vacuum module on the back of the tranny), heater/air conditioning control (if you have A/C), cruise control and then connection(s) for emissions crap.
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post #27 of 32 (permalink) Old 03-20-2017, 09:54 AM
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Originally Posted by Ziggy View Post
Without emissions crap you will hook your dizzy directly to the vacuum port that is located on the passenger side of the carb just below and slightly forward of the choke linkage.
Not to hijack but since it's directly related: I can't run my vac on that port forward of the choke body. If I time it with the vac disconnected and then hook it up there, the detonation is so bad at all RPMs other than at idle, it can't be driven. I tried again yesterday after reading this and it performed the same. My vac line is hooked up at the rear top of the carb on the driver's side(done by mechanic).

Is this perhaps caused by something amiss with the carb or vac pot? I've read in multiple posts that the port you mention is what we should use on vehicles with the emissions removed but I just can't seem to get mine to work there.

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post #28 of 32 (permalink) Old 03-20-2017, 01:22 PM
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post #29 of 32 (permalink) Old 03-20-2017, 11:20 PM
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schwim - At the moment I'm at a loss as to why you can't hook your dizzy to the vacuum port without issues. It would be interesting to see what sort of vacuum you're pulling between the two ports at idle and with some throttle applied. Do you have the two vacuum ports on the front of the carb spacer plugged?

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post #30 of 32 (permalink) Old Yesterday, 12:38 PM
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Mine doesn't even have the vacuum advance hooked up and it runs great.
Well, to be more specific, there is a hose going to the distributor but it's hooked to a junction that is just open. It was that way when I bought it from the PO, and I haven't gone in to remove all of that stuff yet.

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post #31 of 32 (permalink) Old Yesterday, 01:04 PM
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A lot of people use nothing more than the mechanical advance located in the distributor. For all I know, the port mine is connected to is nothing more than a vent :) Using only mechanical, you usually get a bit more of a sluggish response when hitting the gas.

I will say that although I couldn't use it due to detonation, the dyno installed in the seat of my pants noticed an incredible improvement in response when I connected to the port in front of the choke.
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post #32 of 32 (permalink) Old Yesterday, 01:09 PM
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Yeah, after doing some reading I'm going to tinker with mine. Throttle response has been decent, but sluggish might be a good way to describe it. Weekend project! Need to replace the distributor cap and rotor anyway as I have them laying around.

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