Very Slow Acceleration

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May 21, 2016 | 05:01 PM

#16

BrittsNFords

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Quote:

Originally Posted by orich

1. What's the voltage going to your coil while it's running?

2. Also where do you have your choke power wire hooked into for power?

3. when was the last time you check the compression or spark plug color for a lean
or rich condition?

Also is that a 428 engine or the 76 truck intake manifold.
Orich

The voltage to the coil while running is about 14V.

The choke wire goes through the firewall and to a flat terminal connector on the fuse box. Measured at 12V while running.

I haven't checked compression a long time. The plugs are new but I'll check the compression out when I get the chance.

How can you tells its a 428 intake? That's news to me. Is that going to have undesired effects on performance?

May 21, 2016 | 05:05 PM

#17

mountain dewd

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From: O-O-O-Oreilly's

Do you have a 12V coil?

May 21, 2016 | 05:06 PM

#18

BrittsNFords

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I opened the op of the carb while tinkering and, lo and behold, the fuel bowls had a bunch of crap in them. I gave them a good cleaning. I talked to my neighbor who is mechanic and he would swap the front and rear jets on this carb with a 360. So I did. He then helped me set timing and re adjust the carb screws. Works much better now, but still not quite perfect.

I'm not sure if the jet swapping helped but I'm sure it helped to clean out the jets. The accelerator pump looked springy and the seal wasn't hard so I haven't ordered a replacement yet. But with all that dirt I found I'm tempted to pull it and give it a full cleaning. But for now I'm just excited to be driving again.

Thanks everyone for your help

May 21, 2016 | 05:09 PM

#19

BrittsNFords

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Quote:

Originally Posted by mountain dewd

Do you have a 12V coil?

I'm not sure, I'm guessing it is. It's a standard replacement coil from napa, not a high performance one.

May 21, 2016 | 05:33 PM

#20

orich

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From: **** hole San Jose ca.

Quote:

Originally Posted by BrittsNFords

Intake if 428 has casted numbers on #1 port runner these numbers in front of carb
C8OE-9425-A cast iron intake..
orich

May 21, 2016 | 06:07 PM

#21

BrittsNFords

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Ah I see. I'm still a bit of a noob. There is a big S, then C7AE-9425-E. From my googling, it must be a '67. Thanks for the info. I'm learning a ton about these trucks on this forum

May 22, 2016 | 01:22 AM

#22

GaryKip

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From: Lind, WA- Eastern WA

Replace the fuel filter yet? Yours may be on the bottom of the fuel pump.

May 22, 2016 | 09:42 AM

#23

BrittsNFords

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I did replace the fuel filter, it's between pump and carb. Since there's a bunch of sediment in the carb, maybe I'll pull the pump and see if its gunked up as well.