Oils smells like gas

[JimP]

I have noticed that my oil gets black very fast and also smells like gas. I have let the car sit for days and I always have 40 psi showing on the fuel pressure rail so I'm certain I don't have a faulty injector. In addition lately I have not been pushing the car and have been staying out of boost. I have also leaned it out at idle using the dials on the translator, I can't imagine this being normal or good for the engine if I'm washing down the cylinder walls with fuel.

Does anyone else have this issue or any suggestions?

Thanks,

Jim

 

[turbo nasty]

What do plugs look like?

 

[JimP]

I'll take it for a spin and check them. When I last changed them, this spring I hadn't noticed any wetness, and color was good on the electrode.

 

[Chuck Leeper]

When you "check the plugs", do a leak down, too.

 

[JimP]

OK Thanks will do guys, I'll have to do it this weekend but will advise once done, I was able to read few related posts, will also post scan master numbers at idle, they all looked bang on to me when cruising BLM was down to 120-123 which I think is normal + or -10 from 128. Before turning the MAF dial to 2 in the translator the car really smelled up the lane way idling, now not so bad but I still get the black soot marks in the lane way if I rev it a bit, I have no cat on the car.

 

[groumoutis]

You may have read a thread I started about this same problem. Do you allow the car to idle for extended periods of time? I think that is why mine smelled like gas.

I just changed out my stock valve springs today and I used my air compressor to pressurize the cylinders. Each cylinder leaked a little air by the rings but not to bad in my opinion though. The rings were my worry and today that worry got put to rest.


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[chopped39]

I was going to say pull vacuum line off fuel pressure regulator and see if there is fuel there. The trims look good though.But I would check it anyways

 

[JimP]

OK, I did a leak down test (compression test) all cylinders are in the 150's. I checked all vacuum lines, no cracks and no gas in any, fuel pressure regulator looks good too. I primed the fuel rail let it sit and sit and sit, it holds 42 psi 95% of the time over night. On a couple of instances it dropped to zero within minutes. I either have a bad injector (intermittent) when I turn the car off of it's bleeding pressure at the pump. My car also runs very cool in the 160's all the time so it may be dumping fuel due to the low engine temps. I'll be pulling the 60#'s and getting them tested.

In terms of letting the car idle, I rarely let it idle for any amount of time, need to keep the neighbors happy. So far I think adjusting the MAF setting (within the translator to 2) has also helped, I don't really smell gas at idle and I don't have a cat on it.

 

[bison]

I've never seen an engines oil not smell like fuel that had over 75hp per hole and peak power under 5500 rpm after a few wot blasts. I change my oil after about a minute of wot. It smells like fuel every time.


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[earlbrown]

Jim do you sill have a working PCV valve? And do you actually drive the car or do you fire it up for short easy cruises then turn it off and let it sit?

 

[earlbrown]

Jim do you sill have a working PCV valve? And do you actually drive the car or do you fire it up for short easy cruises then turn it off and let it sit?

 

[EVIL]

I change my oil after about a minute of wot. It smells like fuel every time.

Are you saying that on a daily driver, if you do, per say, five 10 second blasts during normal driving just to feel the power, that it's time to change the oil?

D

 

[JimP]

I do have a working PCV, my cruises are usually pretty good ones, a few miles at least, but I do get on it often that's what the car was built for so I'm sure the oil gets up to it's operating temperature.

As I mentioned my car does run very cool, on the hottest days I might see 175 degrees as I have a huge aluminum Aladdin rad and 160 t-stat. So far it hasn't gotten worse after my recent oil change the smell is just noticeable but the oil gets black fast.

We'll see what it looks and smells like once I get a new turbo to replace the loaner I am using. I'd have this thing all wrapped up but I'm currently working nights which does not leave me a lot of spare time.

 

[vacuum 6]

My experience a correctly working PCV does not help much when a car starts trapping 119+. Power = blow by = oil smelling like gas. Maybe go to a hotter plug.


Walter

 

[BIGPSI]

mine smells also, 80# inj and racetronix dbl pump,plus i drive it like i stole it. i change my oil about every 500 miles. oil is cheap. motor is stock untouched shortblock with 50k on it

 

[turbo nasty]

Ive owned several turbo cars foreign and domestic and the oil always has a fuel smell when changed. From stock to over 580 to the tire

 

[EVIL]

good to know.

D

 

[Mike T]

During the break in of my motor the oil was black and smelt like gas after only 100 miles. Though some of the dark color could have come from the cam lube so I changed the oil. It was black and smelt like gas again by 500 miles. The last change was @ 1500 and it was fairly clean without much of a gas odor.

 

[earlbrown]

If you have a stock 20 bolt pan, about a pint of oil stays in the pan when you do an oil change. If you start with extremely black oil the oil stuff can dilute the fresh oil change fairly quickly.

 

[TBlaze]

If it smells like gas rather quick after an oil change, any chance it can be an injector stuck open?