Need advice why my truck keeps dying - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bean · 07-17-2006, 11:42 AM

I just rebuilt the 250 in my 69. It runs great as long as I don't go very far. Once it warms up it dies. Like I said the truck runs great short distances. I had it bored out.040 do I need to run a different thermostat? What about a fan clutch? Is it a valve problem?

Please help... I want to be able to drive this farther than the grocery store.

sleepyboy · 07-17-2006, 11:46 AM

fuel filter? electrical? When it dies, does the truck turn over? Is it getting gas? Any more info can you give us?

glock35ipsc · 07-17-2006, 11:56 AM

Yeah, need a little more detailed info on exactly what happens when it dies, and what is does/doesn't do after it dies.

wibilly · 07-17-2006, 12:01 PM

i would suspect coil, condensor or ign. modual when it dies check for spark while it's still hot

67ChevyRedneck · 07-17-2006, 12:12 PM

Had the same problem with my 250 years ago.... the carb was full of junk. I pulled the fuel line that went into the carb and the filter was packed full, it would go about a mile down the road and die. I then discoverd the inside of my tank was shot from rust and dirt (reason carb was dirty.) Might want to take a look into the tank as well if you fuel filters are diry (carb and in-line).

bean · 07-17-2006, 12:15 PM

The truck kind of sputters before it dies and seems like it's losing power. It will restart easily. If I keep giving it a little gas it will stay running. The fuel filter is new. The coil is close to new. I'm wondering now about the gas tank.

67ChevyRedneck · 07-17-2006, 12:23 PM

Quote:

Originally Posted by bean

The truck kind of sputters before it dies and seems like it's losing power. It will restart easily. If I keep giving it a little gas it will stay running. The fuel filter is new. The coil is close to new. I'm wondering now about the gas tank.

What about the carb? Is it new, rebuilt or cleaned? If the fuel filter is one of them clear ones, look to see if it's dirty already.

bean · 07-17-2006, 02:08 PM

both the carb and filter are clean

67ChevyRedneck · 07-17-2006, 02:16 PM

I had another thought. Did you replace the gas cap? The earlier years (I think 67-69?) had a vented gas cap and 71 and 72 (I may be wrong on the years) had a vented evaporation system for emissions. If you recently put a non-vented gas cap on it the tank will stop sucking fuel once the air is gone. Try driving the truck around for a bit with the cap off (I would only do this with a low fuel amount as it tends to splash out going around corners) and see if that makes a difference? Did you install HEI or still have the original points?

cdowns · 07-17-2006, 02:22 PM

is the fuel line from the pump to carb touching the block causing the fuel to boil and vapor lock or worse yet did you use rubber fuel hose and not rogid tubing

bean · 07-17-2006, 02:22 PM

No I didn't replace the gas cap. It has a petronix ignition system in it and it checked out fine. I'm really at a loss.

PanelDeland · 07-17-2006, 05:51 PM

So it sounds like a fuel problem.Did you remove the filter in the carb?The sintered bronze one?It may be allowing fuel thru but not enough to keep going.When it dies the pressure may push more thru over a few minutes so it will start again.Just a guess.
Also,did you replace the fuel pump?Sometimes they will stop pumping after they warm up.

bean · 07-19-2006, 02:11 PM

I did replace the fuel filter it's not a bronze one but a paper one. The line from the pump to the carb is the stainless line. I'll double check and see if it's touching the motor.

biglou55 · 07-19-2006, 02:50 PM

It could still be the gas cap. It wouldnt hurt to run it loose like 67 said they have been known to plug up. ask me how i know. it was a very expensive trial and error fix just to find out it was the cap. is the carb leaned out to much causing vapor lock.

bean · 07-19-2006, 03:07 PM

I'll try the gas cap. Should I just take it off all together and see if it runs better?

biglou55 · 07-19-2006, 03:12 PM

No just loosen it so it can suck in air if it needs to. do it with a quarter of a tank or less. just drive it and see what happens. If it doesnt die then just replace the cap. if it does die you will know what it is not.

bean · 07-19-2006, 03:23 PM

Thanks. I'll try that when I get home. It's been really frustrating because when it runs it runs great. I'll let you know what happens.

bean · 07-20-2006, 05:15 PM

I'll be damned if that didn't do it! So far anyway that seems to have taken care of it. Now where's the best place to get a correct gas cap?lol

67ChevyRedneck · 07-20-2006, 05:21 PM

Glad to be of service

Sorry, but I don't know where to get one

Maybe autozone? Just make sure it's "vented."

biglou55 · 07-24-2006, 06:30 AM

Glad it worked out for you. happy motoring. Lou.

jimfulco · 07-25-2006, 01:15 AM

If you can't find a correct one, a '68 Impala cap fits, it just looks kinda strange. On the bright side, nobody's gonna steal it.

07-17-2006, 11:42 AM	#1
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Need advice why my truck keeps dying I just rebuilt the 250 in my 69. It runs great as long as I don't go very far. Once it warms up it dies. Like I said the truck runs great short distances. I had it bored out.040 do I need to run a different thermostat? What about a fan clutch? Is it a valve problem? Please help... I want to be able to drive this farther than the grocery store.

07-17-2006, 11:46 AM	#2
sleepyboy '69 Step Join Date: Mar 2005 Location: Marion, Texas Posts: 722	Re: Need advice why my truck keeps dying fuel filter? electrical? When it dies, does the truck turn over? Is it getting gas? Any more info can you give us?

07-17-2006, 11:56 AM	#3
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: Need advice why my truck keeps dying Yeah, need a little more detailed info on exactly what happens when it dies, and what is does/doesn't do after it dies. __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE

07-17-2006, 12:01 PM	#4
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: Need advice why my truck keeps dying i would suspect coil, condensor or ign. modual when it dies check for spark while it's still hot __________________ common sense isn't so common anymore Last edited by wibilly; 07-17-2006 at 12:02 PM.

07-17-2006, 12:12 PM	#5
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Need advice why my truck keeps dying Had the same problem with my 250 years ago.... the carb was full of junk. I pulled the fuel line that went into the carb and the filter was packed full, it would go about a mile down the road and die. I then discoverd the inside of my tank was shot from rust and dirt (reason carb was dirty.) Might want to take a look into the tank as well if you fuel filters are diry (carb and in-line). __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 07-17-2006 at 12:12 PM.

07-17-2006, 12:15 PM	#6
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Re: Need advice why my truck keeps dying The truck kind of sputters before it dies and seems like it's losing power. It will restart easily. If I keep giving it a little gas it will stay running. The fuel filter is new. The coil is close to new. I'm wondering now about the gas tank.

07-17-2006, 02:08 PM	#8
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Re: Need advice why my truck keeps dying both the carb and filter are clean

07-17-2006, 02:16 PM	#9
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Need advice why my truck keeps dying I had another thought. Did you replace the gas cap? The earlier years (I think 67-69?) had a vented gas cap and 71 and 72 (I may be wrong on the years) had a vented evaporation system for emissions. If you recently put a non-vented gas cap on it the tank will stop sucking fuel once the air is gone. Try driving the truck around for a bit with the cap off (I would only do this with a low fuel amount as it tends to splash out going around corners) and see if that makes a difference? Did you install HEI or still have the original points? __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

07-17-2006, 02:22 PM	#10
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Need advice why my truck keeps dying is the fuel line from the pump to carb touching the block causing the fuel to boil and vapor lock or worse yet did you use rubber fuel hose and not rogid tubing __________________ 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

07-17-2006, 05:51 PM	#12
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: Need advice why my truck keeps dying So it sounds like a fuel problem.Did you remove the filter in the carb?The sintered bronze one?It may be allowing fuel thru but not enough to keep going.When it dies the pressure may push more thru over a few minutes so it will start again.Just a guess. Also,did you replace the fuel pump?Sometimes they will stop pumping after they warm up. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

07-19-2006, 02:11 PM	#13
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Re: Need advice why my truck keeps dying I did replace the fuel filter it's not a bronze one but a paper one. The line from the pump to the carb is the stainless line. I'll double check and see if it's touching the motor.

07-19-2006, 02:50 PM	#14
biglou55 Senior Member Join Date: Sep 2002 Location: Greenfield Mass. Posts: 551	Re: Need advice why my truck keeps dying It could still be the gas cap. It wouldnt hurt to run it loose like 67 said they have been known to plug up. ask me how i know. it was a very expensive trial and error fix just to find out it was the cap. is the carb leaned out to much causing vapor lock. __________________ Certifiably crazy person

07-19-2006, 03:07 PM	#15
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Re: Need advice why my truck keeps dying I'll try the gas cap. Should I just take it off all together and see if it runs better?

07-19-2006, 03:12 PM	#16
biglou55 Senior Member Join Date: Sep 2002 Location: Greenfield Mass. Posts: 551	Re: Need advice why my truck keeps dying No just loosen it so it can suck in air if it needs to. do it with a quarter of a tank or less. just drive it and see what happens. If it doesnt die then just replace the cap. if it does die you will know what it is not. __________________ Certifiably crazy person

07-19-2006, 03:23 PM	#17
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Re: Need advice why my truck keeps dying Thanks. I'll try that when I get home. It's been really frustrating because when it runs it runs great. I'll let you know what happens.



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07-20-2006, 05:15 PM	#18
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Re: Need advice why my truck keeps dying I'll be damned if that didn't do it! So far anyway that seems to have taken care of it. Now where's the best place to get a correct gas cap?lol

07-20-2006, 05:21 PM	#19
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Need advice why my truck keeps dying Glad to be of service Sorry, but I don't know where to get one Maybe autozone? Just make sure it's "vented." __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 07-20-2006 at 05:22 PM.

07-24-2006, 06:30 AM	#20
biglou55 Senior Member Join Date: Sep 2002 Location: Greenfield Mass. Posts: 551	Re: Need advice why my truck keeps dying Glad it worked out for you. happy motoring. Lou. __________________ Certifiably crazy person

07-25-2006, 01:15 AM	#21
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	Re: Need advice why my truck keeps dying If you can't find a correct one, a '68 Impala cap fits, it just looks kinda strange. On the bright side, nobody's gonna steal it.

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