Question about 1989 Chevrolet Suburban

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Vapor Lock-1985 K10-Silverado Chevrolet Pick Up

After driving Forty miles ,Engine gets hot enough, engine will quit running . How can i resolve this problem?

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1985?? you sure ,havent you heard of getting cash back on old vehicles against a new one ,no wonder poor old GM is going bust .As for engine stopping on you try flushing the cooling system out with a bit of caustic soda then refilling with water only if it works then refill with antifreeze ,add the caustic to rad when engine is cold then about 4 big table spoons should do it then run engine for 20 mins or so

Posted on Jun 30, 2009

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Vapor lock check fuel lines make sure not by exhaustals have modulator in distributor tested at parts house-i had same problem spent 500 finally found bad modulator 15 dollar part!

Posted on Jun 30, 2009

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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

2 Answers

Truck just dies when the weather gets hot


Try the ignition pick up inside the distributor, (not the coil) $35-$40 part. That should fix it over 75% of the time.
If its not that, its the vapor lock in the carburetor.

May 29, 2013 | 1985 Chevrolet Chevy

2 Answers

I have a 1988 Suburban w/5.7 and live in AZ during hot weather above 100 it seems to vapor lock on me. I will be driving along and it will just die and I will have to stop and let it cool down for about...


Hello: I would check the fuel pressure when this occurs, this year model should have throttle body furl injection. 10 psi should be the nominal fuel pressure. Check the fuel filter. When it quits does it just shut off or does it sputter a little bit then quit, if it just quits it could be ignition, hei coil, module, pick up, check cap and rotor, rotor for a burn spot close to the distributor shaft

Jun 11, 2011 | 1988 Chevrolet Suburban

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Have troble starting engine after letting seat for a while with unit hot have change fuel regulator next to intake and change out body trodel position sensor


You need to check fuel pressure with a fuel pressure gauge. The regulator is a good guess but the fuel pump can also be letting fuel pressure drop. Once fuel pressure drops on a hot engine the fuel in the fuel rail will boil and essentially be a vapor lock condition. Fuel pressure should be around 56 psi and hold steady for at least 45 minute to an hour. If it drops within a couple of minutes to check valve in the pump is probably bad and the fuel pump module will need to be replaced.

The other thing, when you replaced the fuel pressure regulotar is is possible that you did not get all the old pieces from the old regulator out of the fuel rail. It is common for the screen and o-ring from the old regulator to stay in the fuel rail and they need to be removed carefully with a small pick.

Nov 04, 2010 | 2001 Chevrolet Silverado

1 Answer

When I get stuck in traffic in real hot weather I get a vapor lock and I just run out of fuel to the carburetor. The engine will restart if you prime the carburetor 1985 Chevrolet C 3500


Not an expert here but hope this helps. I had an 85 GMC Van and the previous owner had installed an electric fuel pump in engine compartment. I too would stall when hot. I finally relocated fuel pump to underneath the van and it ran cool and no more vapor locks.

Oct 31, 2010 | 1985 Chevrolet C3500

1 Answer

What is the fuel pump cooler module


Its built into the fuel pump in the tank and it is also used in conjunction with the fuel regulator to help with keeping the gas from getting to hot as it returns to the tank and cools the fuel. This is why you don't get Vapor lock on new cars because the fuel recycles continuously as the engine runs,

Apr 20, 2010 | 1994 Chevrolet Silverado 2500

1 Answer

Dies while driving


If the engine stalling occur when the engine is hot the most probable cause is a vapor lock, this is when gas boils before it reach the engine, when the engine is extremely gets hot, the gas boils and an air bubble is formed which causes the air/fuel mixture to be too lean, too much air and not enough gasoline, thus making the engine to stall. When you experience vapor lock, just let the engine cools down, have a mechanic to check your cooling system it might cause the engine to get extremely hot.

Engine stalls while driving a vehicle with carburetor

Apr 09, 2009 | 2002 Nissan Sentra

5 Answers

2000 chevy silverado 1500 4.3 eng


Chevy Trucks, Blazers, S10 pickup and the like will vapor lock ecspecially the 2000 models. Do not tighten the gas cap past 1 click. There is a tube that runs from the top of the tank down and this gets hot and collapses or burns in half. We just bought a reinforced rubber tube cut it to lengh and use it instead of part and it's worked grat for 2 years so far.

Jul 21, 2008 | 2000 Chevrolet Silverado

2 Answers

1985 K10 silverado


I have the wiring diagram if you still need it.

Jul 06, 2008 | 1983 Chevrolet Silverado

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