Accellerator pump? Put a little gas in a bottle, crack the throttle and give her some fuel at the same time. See if it helps anything. If its getting all the gas it needs from an external bottle, you have carb issues. If not, then check distibutor and spark. Get an inline spark tester and see if you lose spark when you crack the throttle.
The module inside of that HEI is notorious for being junk right out of the box . If it is an Ebay distributor? even more so. For some reason even when going to NAPA, Autozone etc.I have had issues. GM designed the ignition and it is better than points but whoever designed the module itself needs to be kicked in the .................. as in the past I have wasted time going through 2 or 3 new modules in a row until a working one was found I have a 94 3500 with a 454, and a 91 with a 350 and both have aftermarket spinners in them. Both vehicles have an extra, new, KNOWN working module in the glove box. And for whatever it's worth? OEM units have the same problems. It seems that moisture, heat and cheap and/or poorly run spark plug wires will fry them too if an arc jumps. If you put a plug on one of the wires and then hold it close enough to check spark and the gap distance is really long, when it fires that large grounding gap causes the unit to bug out. I am pretty sure there was a GM service bulletin warning the techs. not to check spark this way as damage can (or will) occur. By the way, that engine sounds great!
No ebay distributors here, I swore off them after a coil melted in one I was running. Thanks! The cam I'm running has great chop. More of Hank coming soon!
That sounds Like Your HEI is messing up, may be shorted out internally, that’s the worst things about parts now, they may be good on arrival or DOA after a few short runs, my 2nd DUI distributor was DOA. Could be a pinched fuel line, anything like that but an issue like that sounds to me like the distributors advance isn’t working correctly.
It’s hard to tell from the video how the idle sounded exactly but I’m leaning more towards the carburetor. How long did it sit before you ran it? I’d almost pull the carburetor and just check inside particularly the bowls.
Got it figured. You guys ROCK! Will post a video about it.
Accellerator pump? Put a little gas in a bottle, crack the throttle and give her some fuel at the same time. See if it helps anything. If its getting all the gas it needs from an external bottle, you have carb issues. If not, then check distibutor and spark. Get an inline spark tester and see if you lose spark when you crack the throttle.
The module inside of that HEI is notorious for being junk right out of the box . If it is an Ebay distributor? even more so. For some reason even when going to NAPA, Autozone etc.I have had issues. GM designed the ignition and it is better than points but whoever designed the module itself needs to be kicked in the .................. as in the past I have wasted time going through 2 or 3 new modules in a row until a working one was found
I have a 94 3500 with a 454, and a 91 with a 350 and both have aftermarket spinners in them. Both vehicles have an extra, new, KNOWN working module in the glove box. And for whatever it's worth? OEM units have the same problems.
It seems that moisture, heat and cheap and/or poorly run spark plug wires will fry them too if an arc jumps. If you put a plug on one of the wires and then hold it close enough to check spark and the gap distance is really long, when it fires that large grounding gap causes the unit to bug out. I am pretty sure there was a GM service bulletin warning the techs. not to check spark this way as damage can (or will) occur.
By the way, that engine sounds great!
No ebay distributors here, I swore off them after a coil melted in one I was running. Thanks! The cam I'm running has great chop. More of Hank coming soon!
That sounds Like Your HEI is messing up, may be shorted out internally, that’s the worst things about parts now, they may be good on arrival or DOA after a few short runs, my 2nd DUI distributor was DOA.
Could be a pinched fuel line, anything like that but an issue like that sounds to me like the distributors advance isn’t working correctly.
Thanks, I'll swap it with a few I have on hand to check. Might even unplug all the extra msd stuff to make sure that isn't it
If you have a HEI it can be a bad module. They can fail and do act up just let that. It happened to me before.
Thank you, I'll try swapping it out
@@diveingarage make sure the hei get 12volt all the time it will help in the long run
Ok, I'll double check
It’s hard to tell from the video how the idle sounded exactly but I’m leaning more towards the carburetor. How long did it sit before you ran it? I’d almost pull the carburetor and just check inside particularly the bowls.
I installed that carb way back in December. I've had it off a few times but haven't cleaned it thoroughly.
What did you find out?
Making progress. Will comment updates once I know I have it right.
Bad module or filter in tank