Question about 1995 GMC Sierra

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What would cause fuel to mix with oil

There is gas getting in oil pan can smell it on dipstick and it reads over full

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If you have white smoke emitted from the exhaust system that means youv blow a head gasket which lets anti freeze in the engine compartmen and sometimes fuel in the oil pan

Posted on Nov 27, 2012

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It means your fuel system is pumping it into the cylinder and finding its way into the oil. Older vehicles with carburetors would do this when the carburetor floats would get stuck open and allow that to happen, but on later vehicle with fuel injections systems it kinda unheard of. But can happen. If enough gas has mixed with the oil to raise the oil level noticeably then this should not be that hard to find. And can be extremely dangerous situation. All it were to need is a ignition source and cause your engine to become a grenade. Take air breather off and look for fuel spilling into intake manifold. Should possibly see some puddles of fuel or something. There are not many fuel lines going from the tank to engine. Just check all of them. Hope this helps

Posted on Nov 28, 2012


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Posted on Jan 02, 2017

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SOURCE: 1995 gmc jimmy 4x4 rough idle smell gas from tail pipe

To check EGR valve, plug the vacuum hose to it, and it should not get hot anymore. It if does, it is leaking.
But gas smell is usually bad plug wire or plug.
With good insulation, remove one sparkplug wire at a time, to see if one has no effect. That is the target.

Posted on Jul 25, 2009

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SOURCE: what will cause fuel to mix with oil.2.2 95.

could be a couple things, a bad oil ring on a piston, a cracked block, probably more that I am not thinking of.

Posted on Feb 16, 2010

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SOURCE: oil mixing with gas no temp rise no water loss.2.2

yes it is possible to have a failed injector. test pulse and then remove the rail, leave the injectors hooked up electrically and have someone turn the key on (prepare for fuel spray by disconnecting the ignition and covering the area with a protective cover to also prevent the risk of fires), and watch for the patern. you can also isolate the problem easier by when it is running, disconnecting the harness at the injector or plug wire and notice the engine change. the one that doesnt change, is your problematic cylinder. then test accordingly.

Posted on Feb 16, 2010

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SOURCE: the fuel gauge on my 2000 jimmy is reading 3/4 -

The float (in tank) or connection to float (wiring) is corroded or has come loose.

Posted on Feb 25, 2011

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2006 Saturn Ion had oil changenow I smell gas in the oil and the oil pressure dropped very little

It is very hard for fuel and oil to mix. Unless by sabotage, check the color of your oil, do not go by smell. Fuel is a byproduct of oil. If you oil has not been changed in proper intervals you will still have some discoloration but if fuel was added to oil you would be seeing a grayish color on your dipstick. Fuel destroys the viscosity of oil and causes internal breakdown of engine bearings.

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It has white smoke when u run it for 10 min it stops

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Looks and smells like gas in the oil. The oil level is high on the dipstick and very thin. Think its the fuel pressure regulator?

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I have a 1997 chev lumina with 107000 miles on it. the car blows bluish smoke from the exhaust pipe and smells like gasoline. When I smell the oil dipstick it also smells like gas, would this be a bad fuel...

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98 jeep grand cherokee black smoke

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May 18, 2009 | 1998 Jeep Grand Cherokee

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Gasoline has contaminated my oil in oil pan

to answer this question would be like putting my head on a chopping block, this needs to be diagnosed by a certified mechanic with all the proper tools, the list of things that could be wrong is mind boggling

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Oil pressure

It sounds like the oil pump is getting weak and you need a tune up from the information you gave. But before you pull up the engine to get that oil pan off, check the oil pressure switch. The oil pressure switch will send a false signal to the ecm when it starts to go bad and it will in turn throw other sensors off. It can also cause too much gas to go through the fuel system and find its way back into the oil pan. Hope this helps.

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