Hei Altinator dependent? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Huck · 11-10-2002, 10:56 PM

MY Jimmy 307 starts but die's after a minute or two. I do not have the altinator hooked up and am just running off the battery. Could this be a problem or do I need to look deeper? Compression is excellent, wires are new, Carb is new, fuel pump is good, plugs are so-so but it starts consistantly. Thoughts~~~~~~?? Huck

Blue_71 · 11-10-2002, 11:02 PM

timing? the 355 i got from you was doing that until today when we adjusted the lifters, timing, and carb

Longhorn Man · 11-11-2002, 12:16 AM

Huck, did you just wire up the HEI, or has it been in there a while?
It kinda sounds like the wire is only getting power while you are cranking it.
As long as your HEI is getting 5 volts or so, it'll idle. It won't rev too good with real low voltage, but at real low RPMs the cylinder pressure is so low it doesn't take too much to ignite it.

67shortie · 11-11-2002, 12:28 AM

Ya, an HEI or any ignition for that matter will drain the battery and run before it dies. I will go out on a limb and say you have a fuel delivey problem. Either be a lean out condition or an idle fuel starvation.

Longhorn Man · 11-11-2002, 12:37 AM

Normally a fuel problem will stumble and die...not just quit though.

cableguy0 · 11-11-2002, 12:56 AM

i ran my truck for like 6 hours on just the battery never had a prob but it was a brand new battery

Gordo · 11-11-2002, 09:49 AM

Huckster!
Starts right back up on that battery without jumping it? If so I would say you have enough batt power to run the HEI. If you need to jump it to start it again, I would say you don't have enough batt power. I'd check into the fuel delivery also. Take a look at the in carb filter, I've seen them installed backwards.

11-10-2002, 10:56 PM	#1
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	Hei Altinator dependent? MY Jimmy 307 starts but die's after a minute or two. I do not have the altinator hooked up and am just running off the battery. Could this be a problem or do I need to look deeper? Compression is excellent, wires are new, Carb is new, fuel pump is good, plugs are so-so but it starts consistantly. Thoughts~~~~~~?? Huck

11-11-2002, 12:28 AM	#4
67shortie Green club Join Date: May 2002 Location: Central CA Posts: 1,059	Ya, an HEI or any ignition for that matter will drain the battery and run before it dies. I will go out on a limb and say you have a fuel delivey problem. Either be a lean out condition or an idle fuel starvation. __________________ 71 short/fleet ECE 4/6 drop, LQ4/700r4/3.42 gears 70 SS396 Chevelle 427/200-4R/3.73posi 61 Lincoln Continental, black on black Son you are going to drive me to drinkin if you don't stop drivin that hot rod lincoln

11-11-2002, 12:56 AM	#6
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	i ran my truck for like 6 hours on just the battery never had a prob but it was a brand new battery __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

11-11-2002, 09:49 AM	#7
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	Huckster! Starts right back up on that battery without jumping it? If so I would say you have enough batt power to run the HEI. If you need to jump it to start it again, I would say you don't have enough batt power. I'd check into the fuel delivery also. Take a look at the in carb filter, I've seen them installed backwards. __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.

11-11-2002, 12:16 AM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Huck, did you just wire up the HEI, or has it been in there a while? It kinda sounds like the wire is only getting power while you are cranking it. As long as your HEI is getting 5 volts or so, it'll idle. It won't rev too good with real low voltage, but at real low RPMs the cylinder pressure is so low it doesn't take too much to ignite it.

11-11-2002, 12:37 AM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Normally a fuel problem will stumble and die...not just quit though.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.