Well I just finished the compression test, biggest PITA I have ever had. Sadistic people must have designed the LT1. Here are the results:
1: 225psi
2: 228psi
3: 210psi
4: 212psi
5: 219psi
6: 213psi
7: 208psi
8: 214psi
Do these look good?

The plugs that I pulled look decent, definetely no oil fouling, and none smell like gas. I also found out that the previous owner was a lazy bastard, the six easy plugs were new, while #2 and #8 were still the originals.

Well now I am really stumped: its not the FPR, its not the injectors, its not the rings, and no dead cylinders. What else could it possibly be? Please throw out any ideas you have guys, I will tear this engine apart until I find this problem.

BTW Where did you guys get your fuel pressure gauges, I went to 4 local stores and the clerks looked at me like I was retarded when I asked for one.

 

oreileys $20

 

It might not be necessary around the ports, but it definetely can't hurt to put a thin bead on, especially when I had to pull it off once to fix a leak around the ports.

How do I check the PCV system? I heard that you put a piece of paper on the oil filler tube, and if it stays the PCV's good? Could a bad PCV somehow pull in gas fumes into the crankcase, I really have no idea how it works.

Feenix, testing the injectors isn't too hard. Like I said, I pulled the fuel rail all the way out, then suspended it from the hood with wire maybe 6" above the manifold, hooked the fuel lines back up and pressurized the system. Put something underneath and watch for dripping. I don't think the injector harness has to be connected to test for leaks, but maybe sombody more knowledgable will answer that. I also have hard starts, I like to prime the pump twice before starting, and it fires right up. You should definetely take care of this problem ASAP, gas in the oil will mess up your motor pretty quick.

 

I have a question regarding your original post...You stated that you keep getting gas in the oil. Is the oil level rising??? Is it noticable that your oil's viscosity has been thinned by fuel, or are you just smelling raw fuel in the oil. How do you know there is "gas in the oil"???

 

You want a pressure gage with a hose attached, not like the one that Accel offers where the gage is placed directly on the schrader valve. This will allow you to tape it to the windshield so it can be viewed from the passenger seat while driving to help in the future with any drivability issues.

You can get them from Sears or any source of Lisle tools. The one from Lisle, allows you to read fuel pressure and also can be used for vacuum as well. Pretty trick.

If all your injectors are not leaking, all the cylinders are firing and the FPR is not leaking, you have eliminated all the possible causes of fuel leaking into the oil. Any other causes would show up as drivability issues and would cause the fuel milage to go to crap.

There are only 2 times the oil can get contaminated with fuel. When it's running and when it sits. If it's when running, it will more than likely smoke, foul (a) or many plugs, have a dead cylinder and be noticeable running.

If it's when it sits, there are only 2 causes. Injectors or FPR.

This leaves us with 2 choices: Either you mistakenly thought the oil (was, is) contaminated with fuel. Or, you missed the cause when you looked the first time.


Time to step back and re-evaluate the situation.

 

yeah, I plan to take care of it, i just changed the oil about a week ago and it only has a hundred miles if that, actually I know its not even 100 miles yet on that oil change and thats when I started noticing it, about 3 day's after the oil change. And my oil level has rose a bit too, not much, but enough to notice, so I'd say im getting some significant leakage. I haven't drove it in a couple day's cause the ecm is out getting tuned, but I did check my FPR and it seems to be fine, but my injectors haven't been checked and im almost sure they've got to be the culprit because there are absolutly no driveablility issues other than a small high rev tiny bit rough idle when I first come to a stop that sits at about 1200 rpm until I come to a complete stop then it drops to normal. Its just the hard starts and gas smell in the oil, so im guessing for sure the injectors. I'll check them today. Thanks for all the info slopo, and I didn't mean to hijack I just thought my problem was identical so any help for me would be helping the original poster.

 

What other causes are you talking about, because my fuel mileage has been pretty crappy?

I guess I'm gonna double check everything and put it back together. At the very least I got new plugs and know I have good compression. How many times do you think I have to flush the system to get all the contaminated oil out?

I didn't really notice the oil level rising, I just smelled fuel when I put my nose at the oil filler cap. The viscosity seemed normal too.

 

Well, it is normal for some fuel(or vapor) to get by the rings. Along with by products of combustion. Very little though. The pcv system's job is to remove those contaminants from the oil. It pulls fresh air from the pass. side t/b through the motor and back into the intake(just under the t/b) and is introduced into the combustion process. If the system is malfunctioning, all those contaminants just sit in the oil, along with condensation.

 

How common of a problem is PCV failure and how hard is it to correct?

 

Not sure how common it is but most of the time it is caused by the pcv itself. All you have to do is take it out and clean it and you are good to go.

 

pcv valve is cheap and easy to replace located in the side of the intake manifold about halfway down the length.

 

I just finished putting the new plugs in hoping it fix a possible dead cylinder. No such luck, filled it up with fresh oil and filter, and 5 minutes later, new oil smells like gas again. I now want to double check everything. I am not 100% sure I tested the injectors right. I disconnected the fuel lines, pulled the fuel rail with the injectors all the way out of the manifold, suspended it off the hood with wire and then hooked the fuel lines back up and pressurized the system. The injectors did not leak at all.
But during the test, I did NOT hook up the injector harnesses to the injectors (they couldn't reach), and did NOT hook up the FPR vaccum line. Do the injectors even fill up with fuel without the harness attached when I prime the fuel pump? If not that would explain why they didn't leak.

 

The injectors will still see pressure with them unplugged. The only problem I can see is if a wire is shorted causing the injector to stay open when it is supposed to be shut(I doubt that is the case).

The vacuum line won't be a problem(unless it was a faulty fpr, which you said it wasn't).

 

It's your imagination. If it did what you said, as fast as you say it does, you could drain all the oil and leave the drain plug out of the oil pan. In a short period of time, you would see fuel coming out of the drain pan. There is no way.

 

could it be the contaminent's residue still in the crankcase that was left behind cause the smell to still be there that soon???