gas i oil pan. need help.

[venumnos]

can bad spark plugs cause gas to seep threw to the oil pan at idle?? even though no missfiering? i had just installed an aeromotive fpr set it at 43psi with the vac hose off and i also did and oil change so the oil was brand new. all i did was turn the car on after doing this and after a little while of it warming up i gave it a little gas it bogged and shut off then it did not want to start again check the oil dip stick it was straight gas...???

 

[supravw]

Your cylinders were washed down with fuel by running way to rich. I'd double check your work, pull out the spark plugs and take a look at them and if your oil is really that badly mixed I would change it. But try those things and get back to us. We're going to need more information to help you out better.

 

[romeen]

What did your FP drop to when you reinstalled the vacuum hose to the AFPR?

Also, pull the AFPR vacuum hose off and make sure that there is no gas in it. If there is then you have a defective or improperly installed diaphragm (separates top and bottom half of unit).

If you have a mechanics stethoscope (you can get one for a few bucks at Harbor Freight) you can listen for the clicking of the fuel injectors to make sure that one or more are not stuck open. I have heard of guys using a long wooden dowel or screwdriver to the same effect but haven't tried it myself to see if it actually works.

Also check your PCV system for proper function. A compression test may not be a bad idea either to help determine if you are getting excessive blow-by.

 

[16g-2ndgen]

trust me this isnt a fun experience with gas in oil, how many miles are on your engine? you might have bad rings if there is exessive miles on your motor. i had that same problem becosue my car was not sparking and every time i cranked it over more fuel with 550's sprayed into the combustion chamber and just seaped right through the rings.

 

[venumnos]

What did your FP drop to when you reinstalled the vacuum hose to the AFPR?

Also, pull the AFPR vacuum hose off and make sure that there is no gas in it. If there is then you have a defective or improperly installed diaphragm (separates top and bottom half of unit).

If you have a mechanics stethoscope (you can get one for a few bucks at Harbor Freight) you can listen for the clicking of the fuel injectors to make sure that one or more are not stuck open. I have heard of guys using a long wooden dowel or screwdriver to the same effect but haven't tried it myself to see if it actually works.

Also check your PCV system for proper function. A compression test may not be a bad idea either to help determine if you are getting excessive blow-by.

i didnt pay too much attention to the FP after i hooked to vac hose back on but if i'm not mistaken i think i saw it at 39psi (at first for like two min or so i had no vac pressure at all the it kcked in and it was wround 39) as far as the gas in the vac line there was none that i notice but it did somewhat smell like it. i checked the injector like u said and they are not stuck open. another question could a bad O2 sensor cause it to send more fuel??? when i took it out it was pitch back does it matter???? oh and yes my spark plugs were same pitch black but thats just because of all the fuel i was getting in there.
i just bought new plugs nkg bpr7es gaped at .030 and i got new oil should i try starting the car again and see what happens or what else should i do???

 

[venumnos]

trust me this isnt a fun experience with gas in oil, how many miles are on your engine? you might have bad rings if there is exessive miles on your motor. i had that same problem becosue my car was not sparking and every time i cranked it over more fuel with 550's sprayed into the combustion chamber and just seaped right through the rings.

my car has 51k

 

[fourreGsixty3]

The o2 sensor could be stuck lean. Thus always telling the ECU its lean, and adding fuel. Check your STFT, and LTFT.

Change your oil imediately. Also check your PCV. If it is clogged then it can't remove the blow-by gasses (how the fuel is getting to the crank case...thus into the oil). An easy way to check it would be to rev the motor with the hose off the pcv to manifold, then put a thick buisness card or likewise piece of paper up to the exposed end of the pcv. If it is ploper working order then it should hold the card. If it doesn't the PCV is probably junk. Its a $5 part so not too bad if it needs replacement.

 

[romeen]

i didnt pay too much attention to the FP after i hooked to vac hose back on but if i'm not mistaken i think i saw it at 39psi (at first for like two min or so i had no vac pressure at all the it kcked in and it was wround 39) as far as the gas in the vac line there was none that i notice but it did somewhat smell like it. i checked the injector like u said and they are not stuck open. another question could a bad O2 sensor cause it to send more fuel??? when i took it out it was pitch back does it matter???? oh and yes my spark plugs were same pitch black but thats just because of all the fuel i was getting in there.
i just bought new plugs nkg bpr7es gaped at .030 and i got new oil should i try starting the car again and see what happens or what else should i do???

How much vacuum do you have at idle? Fuel pressure should drop 1 psi for every 2 inHg. So if the pressure dropped from a BFP of 43 down to 39 with vacuum then idle vacuum should be an abnormally low 8 inHg. Although low, this wouldn't cause the rich condition. But if you have normal idle vacuum of 18-22 inHg and the FP only drops 4 psi when attaching the vacuum hose then the pressure differential between fuel system and air in IM will be high which would cause you to run rich. Confirm your idle vacuum and fuel pressure at idle and let me know. The AFPR may be defective or improperly put together.

Yes, a bad O2 sensor will cause you to run rich. You can use a datalogger or multimeter to check function of it.

Also decreasing your plug gap to .028" will probably give you better results. The larger gap may cause misfire under load.

 

[fourreGsixty3]

Acceptable gap can be from .028"-.032".

FP should drop to around 35psi. Your FP coinsides (sp?) with that of a N/T.

romeen is correct that your FP drop seems low.

 

[venumnos]

How much vacuum do you have at idle? Fuel pressure should drop 1 psi for every 2 inHg. So if the pressure dropped from a BFP of 43 down to 39 with vacuum then idle vacuum should be an abnormally low 8 inHg. Although low, this wouldn't cause the rich condition. But if you have normal idle vacuum of 18-22 inHg and the FP only drops 4 psi when attaching the vacuum hose then the pressure differential between fuel system and air in IM will be high which would cause you to run rich. Confirm your idle vacuum and fuel pressure at idle and let me know. The AFPR may be defective or improperly put together.

Yes, a bad O2 sensor will cause you to run rich. You can use a datalogger or multimeter to check function of it.

Also decreasing your plug gap to .028" will probably give you better results. The larger gap may cause misfire under load.

ok i check it again my vac is 15 inHg and my fuel press goes from 44 with out vac and 39 with. i also put in a new PCV valve