i discovered a few months back that fuel was getting into my oil i found that an injector was leaking so i replaced the injectors changed the oil and fuel was still getting in the oil i then ran a compression test and found that the two cylinders on the outside are just below 90psi and the two in the middle are just below 140psi and it appears that its got a small leak at the front of the valve cover could this be causing my low compression
Valve cover leaks wouldn't effect compression. If you have low compression on two cylinders next to each other I would guess a small head gasket leak.
theyre not next to each other the cylinders wth bad compression are the two on the outside their seperated by the two in the middle
squirt a little oil in the low cylinders and retest if it comes up chances are its in the rings if not then it probably the head or head gasket
Anytime you test a cyliner WET the compression will come up. This is not a correct way to test it. Leak it down for true test results.
so i did the leak down test and air was only coming out of the oil fill just barely i then decided to do another compression test this time i used a friends tester and all cylinders were 150 so i guess mine was broken but i still dont know how im getting so much fuel in my oil the only thing i can think of is the adjustable fpr but i dont know how to adjust it
run codes.
Go buy you or borrow an EFI fuel pressure tester and check the pressure at the schrader valve on the fuel rail. I don't have the specs handy but I'm sure you will find the correct fuel pressure somewhere on the internet or in a manual. ALSO, since the car has an adjustable fuel pressure regulator, which I assume is aftermarket...you havent said what engine you're running... you should check and see what fuel injectors you are running and make sure you have the right injectors for your ecm/tune. A previous owner may have stuck in some 19 or 24lb injectors in a SO engine...and speed density computers cant handle that. Trust me I have a 351 with ported GT40 heads, a typhoon intake, headers, free flowing exhaust, a bigger SD friendly cam and 1.7RRs running on 24lbers with a 460 ECM (which is set up to handle 24s) in my F-250...you have to have the right ECM or tune to handle different injectors.
he has the 2.3 me think.
running codes should always be the first step. could be un-metered air, o2 sensors, timing, all of those things should show up in the 2 mins it takes to pull codes.
Fuel in the oil is caused by a couple of things. Bad Fuel pressure regulator or a leaky injector. Other than that you are just going to have to pull the injectors and and see if they are leaking. Most likely the fuel pressure regulator comes to mind!
oh yeah sorry its the 2.3 turbo with a garret turbo believe its a .60 oe injectors their the brown ones think their like 30lbs boost control nob adjustable fpr aftermarket bov cone filter 2.5in magnaflow exhaust everything else is stock and its putting alot of fuel in the oil in a short amount of time which is why i think the fpr needs adjusted unless the other two injectors i didnt replace our bad or both
Yes, I agree with running the codes. That should at least indicated A problem...I dunno if it will show a fuel pressure problem other than showing the engine is extremely rich through an O2 sensor code...which it must be (extremely rich) if there's fuel in the oil. Just checking the pressure with the vacuum to the regulator should indicate that.
Sorry...I've become accustomed to V8s with the wrong injectors for their tune. The ECM sees a rich condition immediately but can't properly adjust the injector duty cycle to get the air/fuel ratios it wants to see.
id do an engine cylinder balance test and know if it was an injectior problem before replacing anything.
i did the cylinder balance test the injectors are ok i then pulled the vaccum line off the adjustable fpr and it smelled like fuel im going to test the fuel pressure and if needed adjust the fpr
You are chasing BALLOONS running codes is a waste of time as that ECM is not that sophisticated. And fuel in the OIL is a mechanical or outside issue other than the ECM or a balance test. A balance test is used for cylinder balance not an over rich issue. Chasing Balloons is something that people do on a regular basis.
unless he had a bad injector, then the balance test would have told him that. now he knows its a regulator.
If he had a bad injector the second he drove it one block he would know it!!!!
on a 2.3, yes. on a 3.8 or 5.0, probably not.
i did a fuel pressure test and it was at 28psi while at idle when i disconected the vacuum line going to the fpr it increased to 38psi turbotbird.com says the fuel pressure should be at 35-45psi at idle im starting to think its an injector if i adjusted the fpr and increased the pressure i dont see how that would help keep fuel out of the oil what do you guys think it is
earlier you smelled fuel inside your vac line for the fpr.
your fpr needs replaced.
why it would be a possible cure to your issue is this.......
when your injector gets its ground from the EEC, its internal shaft moves a check valve to let the "regulated amont" of fuel pass through for only the amount of time the EEC supplies the ground.
if your FPR is faulty, faulty in a way that you have too much fuel presure present at each injector, then your unburnt full that sneaked by inside the injector has to go somewhere.
thats my theory,,,,,
if you have a held pump vac gauge, does the regulator hold vac pressure?
or
if you simply put a vac line on the regulator, the suck on the other end ,, and then does the hose stick to your tongue? and stay put?
if not the diaphram inside the regulator is done.
it was the fpr threw one on from autozone and its not runnin as rich the oil pressure has gone up and no more fuel in the oil thanks for the help