wont start, what else to check?

[heidesign]

I been reading this thread,http://67-72chevytrucks.com/vboard/s...&highlight=hei

And a few others.

Here is what I got. Older 350 (dont see the #'s or know where they are, so can tell you the year, or what from).

I dont know much about this beater, just got it a while back and learning.

Originally I was told the dist. HEI was bad. So tried a started working around it to see what else might be an issue.

We decided to work with a known working hei. GOt installed and pointing at #1 Cyl..

Replaced old plugs, changed oil/filter. Fixed spiced wires to Dist (yellow). Installed known working battery running between 12.4-12.8 volts. The wires are some 8.8 silicone accell's (bad speller). Not really liking th e long boots, but might end up replacing soon???

We did a #1, and #3 spark test (very weak spark). Faint blue almost mower like spark.

The carb a 4brl edlebrock seams to be stuck also, so we sprayed eather, tried it, nothing. Sprayed eather in #1 had a little burp/fart, then nothing.

Oh, instead of running gas from bad tank, we were using a milk jug(so we could see it). The fuel pump works great. Just so you know.

What else might I check for. What is the little capacitor looking thing on th e firewall that is ran to the hei? It is about 3/4-1" long and about 1/2" dia.? Did not know if it was a resister, or something that might have went bad?

Im trying here, but the truck seams to be more trying.

What I am looking to do when I get back from vacation, is this.

Remove carb, and gastank. Clean up and tune carb, install clean gas tank. Replace silicone wires with a different set, that are known to work, or do a resistance test on the wires,and make sure they have no punctures. I would like to test the two HEI's to make sure when we tried jumping the bat.. it did not fry the internal cap, but... (how to check it?).

What now?

The plans are to get this guy running, then remove and take apart install new internals, strip down truck and start fresh. I just want to do it Correctly.

Im not much of a wrench, just learning.

Bill

Bill

[BAGNDRAGIT]

since yu are getting a weak spark try running 12v+ straight from the batt to the HEI. i agree with you statingthat the carb needs a rebuild.

check plug gap and cold time it, #1 @ TDC & go from there

it sounds like a spark issue to me mostly.

let us know..

[heidesign]

Originally Posted by BAGNDRAGIT

since yu are getting a weak spark try running 12v+ straight from the batt to the HEI. i agree with you statingthat the carb needs a rebuild.

check plug gap and cold time it, #1 @ TDC & go from there

it sounds like a spark issue to me mostly.

let us know..

Not knowing the vintage of the motor, I set the gap @ 33, I use to set them at 30, and the book said 35 for a newer motor, but I could be wrong(have been many times.

Set the HEI By having #1 @ tdc, so I guess I will try starting with battery to HEI direct wire.

Sorry for the stupid questions.

Im trying.

Just dont know 2 much.

Might have a buddy, bring over a spare 2 brl carb, and order a carb rebuild kit.

Suggestions?

Thanks,

Bill

Bill

[BAGNDRAGIT]

no question is stupid, only the incorrect answer haha.

hope you figure it out.

if you have a known good carb handy throw it on and see.
the gap @ 33 should be fine.

also check all your grounds, batt to block, block to frame, frame to cab ect ect ect.

[heidesign]

Will Do.

Will post my out come. Honestly dont know a thing about the truck, so cant say it ever ran. Got a decent parts truck price on it. So figured I better try and do what I can.

Only one way to learn..... X doing.

Thanks guys.



Bill