help on the 69 before i burn it.lol - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72shadetree · 02-02-2006, 10:02 PM

on the 69 it will run good for about 15min then it seems like it loses 4cyl.and back fires.when it dies it will fire backup after 10/15 min. and run decent for a few miles
after dark on the plugs the porcelin part that you can see with the wire on it glows blue.its not arcing or jumping it looks life a blue light that gets brighter the more you rev it up
been thru tank and fuel lines
new filter
new coil/cap/wires/plugs
swapped dizzy by the way its a hei
its getting good spark

please help

**kwmech** · 02-02-2006, 10:15 PM

Plugged up exhaust?

**southern parts** · 02-02-2006, 10:38 PM

Is the tank vented? If not, it might run until the vaccum becomes to much and starves the engine. Try running it without the gas cap. Hey it`s worth a try anyway.

jhwkns · 02-02-2006, 10:40 PM

Quote:

Originally Posted by southern parts

Is the tank vented? If not, it might run until the vaccum becomes to much and starves the engine. Try running it without the gas cap. Hey it`s worth a try anyway.

That was my first thought too..

72-stomper · 02-02-2006, 10:46 PM

I agree with fuel vent,,,or if its not that and u got HEI that moduale will do that if fried????????????????

72shadetree · 02-03-2006, 03:00 AM

thanks ive tried the cap.it was running like crap earlier let it sit a few hours and about run the battery dead trying to crank it.no gas in carb worked the throttle several times and got a little bit got it cranked still runs like crap.im going to check fuel pressure tommaro and make sure im getting enough to the carb

chevyman196854 · 02-03-2006, 08:21 AM

chevyman196854 · 02-03-2006, 08:24 AM

hi guys new here but maybe someon can help i going to put a tilt wheel in my truck an would like to know what qould work i found one out of a van with the switch in the dash will it work or is it to short

sneakysnake · 02-03-2006, 11:18 AM

Quote:

Originally Posted by chevyman196854

hi guys new here but maybe someon can help i going to put a tilt wheel in my truck an would like to know what qould work i found one out of a van with the switch in the dash will it work or is it to short

Dude, your hijacking this thread. heres a link for YOU.
http://67-72chevytrucks.com/vboard/s...ghlight=column

**truckdude239** · 02-03-2006, 12:39 PM

bad fuel pump sounds like just sounds like a fuel dilivery problem

GruntyPants · 02-03-2006, 01:30 PM

Another thought, check any of the rubber fuel lines to see if they are being sucked flat... mine has rubber from the pump to the carb, and it they get old they do weird things.

68 short step · 02-03-2006, 01:40 PM

coil in dissy,.... i see you said its new but may be a bad new one

cdowns · 02-03-2006, 01:51 PM

to check fuel pump delivery disconnect line to carb put into jar crank engine for 15sec you should have at least a cup of gas--if not bad pump or clogged strainer in the gas tank/// hei dizzy?? is it wired correctly?? lots of people use the original wires (resistor circuit) and end up frying the modules due to lo voltage

Tynee · 02-03-2006, 03:51 PM

Chevyman, welcome to the board. If you click the link below, it will take you to the main index. From there, you can find the forum that your question fits in the best, and start a new thread there. You'll get better results, and no flaming for thread-jacking. Also, try the search feature (third quick link from the right at the top of the page), it may put you on the trail of the info you need.

72shadetree · 02-04-2006, 08:35 AM

thanks everybody turns out edelbrock has 2 hidden filters you have to take carb apart to get to.full of trash in there time for a better filter and tank cleaning

GMC AMI · 02-04-2006, 08:39 AM

Quote:

Originally Posted by 72-stomper

I agree with fuel vent,,,or if its not that and u got HEI that moduale will do that if fried????????????????

If fried it will not work at all!

roughedup72 · 02-04-2006, 11:43 AM

glad you found your problem, Way to go.

02-02-2006, 10:02 PM	#1
72shadetree KEEP ON TRUCKING Join Date: Sep 2000 Location: martinsville va Posts: 2,563	help on the 69 before i burn it.lol on the 69 it will run good for about 15min then it seems like it loses 4cyl.and back fires.when it dies it will fire backup after 10/15 min. and run decent for a few miles after dark on the plugs the porcelin part that you can see with the wire on it glows blue.its not arcing or jumping it looks life a blue light that gets brighter the more you rev it up been thru tank and fuel lines new filter new coil/cap/wires/plugs swapped dizzy by the way its a hei its getting good spark please help __________________ 72 cheyenne 2wd lwb 71 k20 sons bassett va

02-02-2006, 10:15 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,720	Re: help on the 69 before i burn it.lol Plugged up exhaust?

02-02-2006, 10:38 PM	#3
southern parts Senior Member Join Date: Apr 2003 Location: Elberton Ga. Posts: 3,475	Re: help on the 69 before i burn it.lol Is the tank vented? If not, it might run until the vaccum becomes to much and starves the engine. Try running it without the gas cap. Hey it`s worth a try anyway.

02-02-2006, 10:46 PM	#5
72-stomper Registered User Join Date: Nov 2005 Location: wisconsin Posts: 142	Re: help on the 69 before i burn it.lol I agree with fuel vent,,,or if its not that and u got HEI that moduale will do that if fried????????????????

02-03-2006, 03:00 AM	#6
72shadetree KEEP ON TRUCKING Join Date: Sep 2000 Location: martinsville va Posts: 2,563	Re: help on the 69 before i burn it.lol thanks ive tried the cap.it was running like crap earlier let it sit a few hours and about run the battery dead trying to crank it.no gas in carb worked the throttle several times and got a little bit got it cranked still runs like crap.im going to check fuel pressure tommaro and make sure im getting enough to the carb __________________ 72 cheyenne 2wd lwb 71 k20 sons bassett va

02-03-2006, 08:21 AM	#7
chevyman196854 Registered User Join Date: Jan 2006 Location: woodstock ohio Posts: 11	Re: help on the 69 before i burn it.lol

02-03-2006, 08:24 AM	#8
chevyman196854 Registered User Join Date: Jan 2006 Location: woodstock ohio Posts: 11	Re: help on the 69 before i burn it.lol hi guys new here but maybe someon can help i going to put a tilt wheel in my truck an would like to know what qould work i found one out of a van with the switch in the dash will it work or is it to short

02-03-2006, 12:39 PM	#10
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: help on the 69 before i burn it.lol bad fuel pump sounds like just sounds like a fuel dilivery problem __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

02-03-2006, 01:30 PM	#11
GruntyPants Registered User Join Date: Jan 2006 Location: Kennesaw GA Posts: 95	Re: help on the 69 before i burn it.lol Another thought, check any of the rubber fuel lines to see if they are being sucked flat... mine has rubber from the pump to the carb, and it they get old they do weird things. __________________ -- Shawn '67 Short Step '70 Short Wide

02-03-2006, 01:40 PM	#12
68 short step Senior Member Join Date: Aug 2005 Location: tulsa OK Posts: 3,070	Re: help on the 69 before i burn it.lol coil in dissy,.... i see you said its new but may be a bad new one

02-03-2006, 01:51 PM	#13
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: help on the 69 before i burn it.lol to check fuel pump delivery disconnect line to carb put into jar crank engine for 15sec you should have at least a cup of gas--if not bad pump or clogged strainer in the gas tank/// hei dizzy?? is it wired correctly?? lots of people use the original wires (resistor circuit) and end up frying the modules due to lo voltage __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

02-03-2006, 03:51 PM	#14
Tynee I miss this truck. Join Date: Dec 2001 Location: Lexington, KY U.S.A. Posts: 2,863	Re: help on the 69 before i burn it.lol Chevyman, welcome to the board. If you click the link below, it will take you to the main index. From there, you can find the forum that your question fits in the best, and start a new thread there. You'll get better results, and no flaming for thread-jacking. Also, try the search feature (third quick link from the right at the top of the page), it may put you on the trail of the info you need. __________________ '07 GMC Acadia SLT. Sweet ride. '08 Crew Cab Z-71 short bed. Really like this truck A LOT.

02-04-2006, 08:35 AM	#15
72shadetree KEEP ON TRUCKING Join Date: Sep 2000 Location: martinsville va Posts: 2,563	Re: help on the 69 before i burn it.lol thanks everybody turns out edelbrock has 2 hidden filters you have to take carb apart to get to.full of trash in there time for a better filter and tank cleaning __________________ 72 cheyenne 2wd lwb 71 k20 sons bassett va

02-04-2006, 11:43 AM	#17
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: help on the 69 before i burn it.lol glad you found your problem, Way to go. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.



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