Question about 1994 GMC Jimmy

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I have fuel in the oil - 1994 GMC Jimmy

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Fuel mixed in with your oil indicates, you have a faulty fuel pressure regulator and is leaking. The gas is leaking and running in to your crank case from a broken diaphragm in your fuel pressure regulator.
Replace the fuel pressure regulator which is located in your upper intake manifold, simple fix and good luck.
Thank you for using fixya.
Your fuel pressure regulator is located in part number 23 and can be replaced on it's own without replacing the whole injector unit.
http://www.compnine.com/index.php

Posted on Apr 29, 2010

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Sounds like a top end repair of seals or a piston ring issue, or the intake manifold gaskets are leaking. With the age of the vehicle you may be able to go with the intake gasket first but if its the heads then you have to do it twice, and if its the rings allowing blow by you would have to take the heads off anyway. Just be careful so you get it narrowed down quick and easy check compression to see about blowby and the head may help.

Posted on Apr 29, 2010

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1 Answer

When I fuel up my oil pressure goes up i.e. 1/2 tank of fuel over 80 on the oil guage at same time fuel consumption goes up drasticaly


Adding fuel to the fuel tank is absolutely unrelated to to any change in engine oil pressure.
The oil pressure will be higher when the engine oil is cooler and lower when the engine oil has warmed up.

If you are experiencing abnormally high oil pressure on start up I suspect you are running the incorrect type and grade of oil in the engine. Only use the oil specification(type and grade) listed by the manufacturer for your engine and nothing else.. If you are unsure what that is then it is specified in your owners manual for the vehicle.

High fuel consumption has also nothing to do with your engine oil pressure. If you are experiencing high fuel consumption then please read and examine these factors..........................
Finding and Fixing the Causes of Poor MPG

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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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See id it is actually pumping fuel and if so see if the glow plugs are getting hot.

Oct 07, 2014 | Cars & Trucks

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Fuel in oil pan


you need to check the fuel pressure and the pressure regulator. if these are allowing excess fuel pressure then this will happen. also if the fuel injectors are dirty it can cause excess fuel into the cylinders. this excess fuel will not be burnt and cause what is known as cylinder wash allowing the un-burnt fuel to leak into the oil pan. when you find the cause of the excess fuel repair. you need to change the oil and filter maybe more than once close together to rid the excess fuel in the oil.

Aug 11, 2014 | Cars & Trucks

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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?


Unlikely it's the regulator causing fuel to be dumped into your oil. A stuck open or leaking fuel injector would dump fuel into your oil.

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My 3406b caterpillar engine is having excessively high oil levels


HI,
Time to find out why your oil level is going up.
Either coolant in the oil, or fuel in the oil.
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Any major diesel repair place will help. Just a little oil in a sterile jar to be analyzed for contaminants.
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Is there a reset button on this fuel pump


CHEVY DOESN'T USE A FUEL PUMP RESET/CUTOFF SWITCH, FORDS USE THIS FEATURE, ON A CHEVY IT IS DONE WITH THE OIL PRESSURE CUTOFF SWITCH, SO IF U LOOSE OIL PRESSURE THE FUEL PUMP CUTS OFF, THIS OIL PRESSURE FUEL PUMP CUTOFF SWITCH AND IT'S WIRING ARE NEAR THE OIL FUILTER UNDER THE TRUCK.

Apr 21, 2010 | 2000 Chevrolet Blazer

1 Answer

P1209 code and no start


DTC P1209 indicates that injection control pressure was above or below desired level under normal driving conditions.

Possible causes:

  1. Incorrect oil or viscosity
  2. Poor oil quality
  3. Gel fuel/no fuel
  4. Low fuel pressure
  5. Damaged IPR valve
  6. High-pressure oil system leak
  7. Damaged high-pressure oil pump
  8. Damaged PCM
  9. Verify correct oil quality/viscosity and correct fuel grade are being used for the temperature conditions.

Mar 02, 2010 | 1999 Ford F250 Regular Cab

3 Answers

The yellow oil light comes on for about 5-10 secs when you start the car from cold, and then goes off.


Hi

The usual problems that would give you a delay in the oil warning light going out are...

1. Oil contaminated by fuel, and thin due to fuel injection system problems, and fuel draining into sump.

( How long ago did you last change the oil and filter ? Usually about....1 Yr or 12.OOO Mls)
Wipe oil from engine dip stick on tissue, and smell it for fuel !

Have you noticed you use a lot of fuel lately, and the car blows black smoke from exhaust on hard acceleration ?

2. Oil Warning light transmitter faulty. ( The Most Common !)
3. Oil pump pick up strainer clogged.
4. Oil pump faulty.
5 Oil draining back into the sump from the oil filter.( Faulty check valve )

If I were you, I would change the Oil and Filter, and renew the Oil Warning Light Transmitter, and go from there.
If you have a Master Oil Pressure Guage, fit it to the block when the O/W/ Transmitter is off, and run engine to confirm pressure is there from start up, and what it reads when hot, this will put your mind at ease.

Good Luck !

John.

Jan 19, 2009 | BMW 323 Cars & Trucks

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