Question about 2001 Chevrolet Suburban

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My 2001 suburban is acting like it is vapor locked. There is gas in the car, but stalls at any given time. We have had two different fuel pumps put on in 1 years time. not sure what to do. HELP!!!

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Sounds dumb, but clean the inside of the throttle body with a rag and carb cleaner. Very common issue on most Suburbans. Later models added a software update the ECM to manage the air flow change.
If you open it up, you will see lots of black carbon build up on the sides...easy to fix.

Posted on Jul 03, 2009

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Posted on Jan 02, 2017

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When I gas it up it vapor locks and spits gas out the vent holes I have it just barely in the spout and have to go real slow


Are you talking about filling the gas tank>> If yes,,, That is NOT vapor lock... thats just the angle, speed of delivery, size of hose in vehicle, etc that causes the gas to spit out,, try not putting it in so far, and use a different angle.. (mine does the same thing!)..

Vapor Lock is when the engine/carb get so hot that the fuel vaporizes in the fuel lines and carb...THEN "vapor" cannot be pumped into the engine... and it wont run... now ya know!! :)

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My 93 o l d s. 88. Has been acting up lately it runs fine buy every now and then it acts like it is trying to run outta gas. And when i go to put gas in it, it act like it cant even hold $10 worth. What...


It could be vapor locking if you drive for a while then it acts like it is running out of gas. this is caused by the fuel vaporizing before it gets to te carburator. Check the fuel lines for placement close to a heat source like the exaust, Also, the problem could be the fuel pump, you can have a pressure check done to see if the pressure is up to specks.

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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.

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98 intreped stalls after getting warm, about 1/2 on temp. gauge. Then it will not restart fo 15 to 20 min. Also sometimes after driving and shutting down it will not restart untill after sitting for a...


98 and 99 intrepid was manufactured with weak fuel pumps causing them to vapor lock try pouring cool water on the fuel rails on the intake to calm vapored gas then try to start it. Even the temp gauge at half way mark is probably still low on coolant causing engine to be warmer than normal causing the vapor lock to fix this problem replace the fuel pump with a 2000 or newer intrepid fuel pump that carries a little higher psi to prevent vapor lock from reoccurring this pump is compatible with your 98 it will plug right in

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1 Answer

I have a 94 c1500 suburban It shuts down only on really hot days and will restart after a long period of time .Changed relay no help pump is only 2yrs old acts like its got a thermal cut off switch ?


Sounds like vapor lock. Next time it does it go to your fuel pressuer regulator and prees on the test valve to see if any air comes out. Next crank the engine and press the same for for just long enough to see if gas comes out. Your may have a bad regulator.

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My 1988 Ford Bronco 5.0 has been stalling / acting like its run out of gas. (Has always run great before) I know it has plenty. Today 7.28.10 It stalled twice, first time it did it had at least 1/4 tank,...


You might have what is called vapor lock. The fuel gets so hot that it boils in the fuel pump or the lines. Do this test spay water on the fuel pump to cool it off . ( this only works for a few minutes before it gets to hot and vapor locks again ) If you can Keep the engine heat Off the lines and the Fuel pump it might help. If you have metal fuel lines near a heat source rap them with something such as rubber fuel line sliced down the middle to keep the heat off them If you are using an aftermarket electric fuel pump relocate it down low near the gas tank ( they work better pushing than pulling ) away from any heat source such as exhaust If your using the stock fuel pump try replacing it with a new one it might be getting weak Replace the fuel filter while your at it.

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1 Answer

Same thing here!!!!


Nope... vapor lock has been eliminated for some time due to the advent of fuel injection at 40 to 50 lbs.... The problem still could be the fuel pump.. you need to have it diagnosed by a professional technician - then you'll know for sure.

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