Gas in the oil?

[Hotrodlincoln]

Obviously running rich. Fuel pressure may be too high, might be an injector stuck open (gets my vote).

A fuel pressure test will reveal the culprit.

 

[kimcrwbr1]

I was just looking into the B12 carb injector cleaner it sounds like it is really good stuff maybe that would help has anyone used it.

 

[chazzone]

I agree that the engine could have issues with too high fuel pressure, or an injector sticking on, but have you done a compression test?

It'd be good to know that you have a sound block and heads before you go any further.

A cracked head might not show up in the coolant, but a comp test will show it.

Bad rings will show up, too, and could be allowing gas to run into the oil.

You also need to take a look at the PCV. If the engine is sludged up, this is the number one culprit.

I've used B-12, Techron, usually use Sea Foam, and just tried some BG44K. (My brother, another ex-Ford mechanic and Air Force guy, swears by it.)

I think they all work more or less. Depends on how bad the injectors are clogged or corroded.

 

[Deluxedave]

Update: I went out this morning and noticed the fuel pump does not shut off when I turn the key on. My 87 Ranger 2.9 runs the fuel pump for about 5 seconds, then shuts off. I went back by the fuel tank and could hear it humming, and under the hood it makes a sound like a leaky hose. Could it be a stuck fuel injector?

 

[kimcrwbr1]

you can pull the plugs and see if one or more smells like fuel after you had it running. I believe it will lose pressure back into the tank with the ignition off but not supposed to dump fuel in the cylinders with the engine not running. And would it be better to replace all the injectors at once or can you just replace the seals.

 

[Deluxedave]

What causes the fuel pump to shut off when you turn the key on? Is it a pressure reading somewhere?

 

[IMenriched]

What causes the fuel pump to shut off when you turn the key on? Is it a pressure reading somewhere?

thinking that it is more electrical....might want to check those relays

also just because the vacuum line is dry off the FPR...doesn't necessarily rule a faulty FPR out....just that the FPR internal diaphragm isn't ruptured. Fuel pressure readings tell a clearer picture

 

[Hotrodlincoln]

What causes the fuel pump to shut off when you turn the key on? Is it a pressure reading somewhere?

Usually it's a simple timer. Like a turn signal flasher relay. On for a certain amount of time, then turns off, but stays off until the ignition is cycled again. This is generally separate from the main fuel pump relay.

As I, and others, have said before, a FUEL PRESSURE TEST will reveal whether the fuel system is the culprit here. You may hear a "leaking" sound when the fuel pump is running because excess fuel in the fuel rail is returned to the tank via a low pressure return line that is comes off of the FPR.

 

[Deluxedave]

I stand corrected and will do the fuel pressure test and let you know what I find.

 

[Deluxedave]

Still have not done the fuel pressure test, but did find a jumper wire plugged into the fuel pump socket on the diagnostic connector and grounded to the frame. When that is plugged in, the fuel pump runs constantly when I turn the key on with the engine off(not just for the 2 seconds to prime). When I remove the jumper, the fuel pump does not run at all.
I swapped both relays with my 87 and they seem to be working fine there. Does anyone have any ideas on where to start looking? Fusible links? fuel pump wiring?

 

[Psychopete]

Are you saying that the fuel pump works when the diagnostic fuel pump test is on, but otherwise it doesn't work at all?

The computer controls the fuel pump relay from pin #22 which is a ground, what is happening there is that the computer's control is being "overridden" by grounding that pin on the diagnostic connector.

The reason it's not on all of the time (like when you turn off the key) is that the computer relay also has to be functioning for the fuel pump relay to work - so it sounds like your relays are fine.

Sounds like either there's a bad connection from the computer to the fuel pump relay, or the computer is missing something to signal to run the pumps. May be something related in the distributor/TFI.

 

[kimcrwbr1]

I remember reading something about the TPS or a vacuum switch or the vehicle speed sensor anyway isn`t there something else that tells the computer to turn the fuel pumps off other than a fuse or a relay.

 

[Deluxedave]

Where/what is the "computer"? Is that the same as the Ignition Control Module? Thanks for tolerating rookie questions!

 

[Spitfire1975]

computer is behind the interior kick panel under the glove box on the passenger side. Take off the panel and there it is.

The computer takes all of the information from your various sensors and, amongst other things, controls the fuel mixture your engine receives.

 

[Deluxedave]

Help!! I just tried to see if I could get a code to tell me where the fuel pump circuit is broken. I installed a test light between the self test output and the positive battery terminal. When I installed a jumper between the test lead and the self test input, the light came on and stayed on. I turned the key and the light went out for about 3 seconds then came on and stayed on. Any ideas??