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I have a Chevy c10 305 vapor locks on hot atlanta afternoons i repositioned the fuel line didn't help. any suggestions?

Posted by sandovst on


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Tony Rodriguez

  • 255 Answers

SOURCE: Vapor lock

Hi, replace gas cap.....

Posted on Aug 24, 2008


  • 96 Answers

SOURCE: i have a 2003 kia sorento ex. When the return line

If you take the fuel return line off and it starts, it should spray some fuel out of the fitting the line slips onto. If not, you are either pulling the vaccum line or the pressure regulator is bad, or you could have a fuel pump going bad. One way to check the regulator is to apply vacuum to the port on the regulator and turn the key to "run" not start. With vacuum applied, fuel should run out of the return line fitting. If not, bad regulator or weak pump, maybey even a clogged fuel filter. If so, vacuum leak or blocked hose. Let me know if this helps :)

Posted on Jun 16, 2009



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SOURCE: Car stalls after one half hour driving in hot weather (80's).

It may be runnig to hot, try to change the thermostat for a colder one and try it.

Posted on Jul 09, 2009

cy schousboe

  • 2002 Answers

SOURCE: how to change a starter on 1984 chevy c10 with a

First disconnect the power cable from the battery. If your starter has a mounting bracket on the nose undo that nut first ( some have, some don't). Undo the nut that holds the battery cable to the starter and remove the wires ( count them so you know how many go back on). Under the truck you have to remove the inspection cover from the front of the transmission next to the motor. Undo the 2 bolts on the bottom of the starter. When these come out the starter will drop so be prepared because you still have 1 wire attached. Ease the starter down and remove the small wire from the inside of the solenoid and take the starter out with you. When you get the rebuilt starter from the autoparts store make sure you get a new solenoid. An old solenoid and a new starter is kind of like recycling used toilet paper, possible but not worth the trouble. It goes back in the reverse of taking it out.
BE CAREFUL putting the small wire back on the new solenoid. It has to be tight but you can easily strip it if you get carried away with it. If by chance that happens just double nut it with the nut from the old one and you'll be okay. Hope this helps.

Posted on Dec 19, 2009


  • 2 Answers

SOURCE: I need the fuse diagram for 1994 Chevy Astro Van

the fuel pump relay is located under the hood, check fuse f11 under the hood as well

Posted on Jan 19, 2010

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Does anyone have suggestions on a 2002 Altima that has vapro lock?

Vapor lock is caused by fuel getting too hot in a fuel line or fuel rail and is rare since modern fuel system circulate fuel fro the tank to the fuel rails and then excess goes back to the tank. Are you sure you have vapor lock? Please describe all symptoms.

Aug 16, 2016 | 2002 Nissan Altima

1 Answer

1979 Leocraft Motorhome. With a 454. When the engine gets hot it stops receiving fuel. Any ideas? Changed fuel pump and collapsed fuel line section.

Sounds like vapor lock. Vapor lock happens when the fuel in the lines gets way to hot and boils/vaporizes and causes stalling . Have the fuel lines wrapped in an insulated wrap or relocate them away from heat sources. Sometimes winter grade gasoline will cause this also.

May 05, 2016 | Cars & Trucks

1 Answer

What makes it vapor lock

If it is a gas engine, its almost impossible to get vapor lock.
Vapor lock is when liquid gasoline turns to a vapor which will not flow thru a carburetor. The usual cause was hot fuel lines going to the carb.
Since the early 1980s engines have used fuel injection which uses liquid fuel under pressure.

Mar 30, 2015 | Dodge Ram 1500 Cars & Trucks

1 Answer

1999 dodge caravon sport vaper lock

I had a 1999 Grand Caravan 3.3L and never had this problem and I lived in Fla. at the time but other vehicles that I've seen this problem in. First, is this vapor lock between the gas tank and the engine or in the engine compartment? If it's between the gas tank and the engine, you might have a rusted pin hole in the steel fuel line or sometimes there might be a section or rubber line in the fuel line where there might be movement in the system. If so, look for a rotted hose or a wet spots on the fuel line from the gas tank to the engine compartment. A tiny pin hole can leak gas out and/or air in and if it's small enough the gas can evaporate before it hits the ground. If it has started locking up in the engine compartment only after all these years, I'd have the fuel pump pressure checked. If this is the case and if it hadn't vapor locked since 1999, up until now the fuel pressure has been adequate to keep the fuel in it's liquid state in the heated environment of the engine compartment. If the pressure has gone low and the fuel line is bolted to something hot like the water pump, for example, like it was on my 1968 307 Chevy Bel Air, the fuel will boil hence, vapor lock. If this is your problem and you can't get it fixed right away, follow the fuel line up from the frame and look for it to be routed, again, near / onto something hot. If you can get it loose and away from the hot area without kinking the steel tube, this may help for a while. I don't know you or how much you know but I would advise against cutting the line and adding rubber hose as clamping a hose to a smooth steel line will eventually leak
and possibly cause a fire. If you know what you're doing or know someone who does, you could use a flairing tool and add more steel line if necessary. In any case, be careful. In the long run, it is always better to repair it or have it repaired properly. Good luck. Jeff M.

Apr 10, 2014 | 1999 Dodge Caravan

1 Answer

What is vaporlock

Vapor lock is when an engine with a carburetor gets so hot the liquid gasoline in the fuel line vaporizes.
Cars with fuel injection use pressurized fuel lines and are almost impossible to vapor lock.

Aug 12, 2013 | 1985 BMW 3 Series

1 Answer

How do you fix vapor lock?

Vapor lock is more or less impossible with a fuel injected engine.
Years ago when engines used a carburetor, liquid gas flowed thru the line from the tank and sat in the bowl of the carb until it was pulled thru the venturi into the intake. If the fuel line or carb became too hot, the liquid gas would vaporize.
Fuel injectors accomplish the same effect by spraying a vapor of fuel into the cylinders under pressure.

May 22, 2013 | 1991 Oldsmobile Cutlass Supreme

1 Answer

Vapor lock? On a 4.3. 2000. Chevy. Blazer

Not really possible.
Vapor lock was when liquid fuel would vaporize in the steel line or carburetor from excessive heat.
Since your Blazer is fuel injected, the fuel can not vaporize in the line.

May 10, 2013 | Cars & Trucks

3 Answers

What is vapor lock?

Vapor lock is when a fluid in a closed system, such as in a hydrolic system, gets get hot enough to boil and produce vapor which unlike a fluid can be cimpressed thus rendering hydrolic systems inoperative. Fluids act as a solid when pressure is exerted on to them but in their gaseous state (vapor) they can be compressed and the pressure needed to move pistons is instead absorbed by the gas rather than applied to the pistons.

Feb 26, 2013 | Dodge Caravan Cars & Trucks

1 Answer

I'm having trouble with my 1984 chevy truck. Its a 454. I think its a fuel problem, but what we have tried, isn't working. Four mechanics and no resolution. It dies, usually after idoling for

Dear An,
Here are a couple of answers for you to consider.
1) Could be "vapor lock".
This is where the gasoline gets too hot on it's way from the tank to the carburetor.
Because the gasoline must enter the engine compartment, which is really hot after about 5 minutes of driving, it wants to "vaporize" inside the gas line , changing from a liquid to a gas.
Years ago, many things were tried to help stop that.
One was to attach clothes pins to the length of the gas line that is under the hood, to dissipate the heat.
Another was to wrap the gas line in asbestos cloth to shield it from the heat.
2) Could be "loaded up with carbon".
Years ago, engines that were large absolutely required to be driven HARD.
Otherwise, they would "carbon up " and die after too many "idling around town" episodes.
I was a police officer that had this problem with a 390 Ford engine. We had to "blow it out" after any extended time of more than 10 minutes of idling.
Blowing it out required putting the "pedal to the metal" until it ran right again.
God bless your efforts.

Nov 06, 2017 | 1984 Chevrolet Chevy

1 Answer

I have a 1986 454 C30 silverado dual fuel tanks . my fuel pump is split so got a new but the new 1 only has one 3/8 in port , and the old has two a 3/8 and 1/4 , is the 1/4 one a return line

Short answer, yes. It is to reduce the chances of a vapor lock forming by returning vapor and hot fuel back to the tank and keeping cool fuel circulating through the pump.

Nov 23, 2010 | 1986 Chevrolet Chevy

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