92 7.3 IDI Smoking

[mbradley]

Hi
I have a 92 F350 7.3 5 speed with 167,000 miles. Just recently it has developed a blue smoke. It smokes lightly at idle and more so when under acceleration and deceleration particularly under compression, such as down a long grade. I replaced the injectors (with Delphi, possibly that was a mistake) not long ago. There is no starting problem and there is no loss of power. The smoke is blue and at idle smells somewhat of fuel. I did get some fuel at a place where I do not normally go recently.I just did an oil change as I have every 3000 miles. As I said before the power is good and the engine runs good just that annoying smoke. It seems from my farming past that we had a tractor with similar symptoms and if I remember right it was an injector that was not seating leaking into a cylinder. Is this a possibility ? Any ideas ? Thanks in advance for your input.
Mike

[VD350]

blue smoke is oil being burned. Check your compression

[roamer37]

When was the last time the CDR was serviced? If its stuck your going to blow a lot of oil out of the crankcase into your air intake

[mbradley]

I guess I am not sure what you are refering to. I am not familar with this component. Maybe you could expand on this a bit.
Mike

[Mr_Roboto]

Crankcase Depression Regulator valve, it works to limit the vacuum applied to the crankcase. When it gets sludged up or the diaphram rubber deteriorates, it allows excessive flow of oil vaopr into the intake manifold.

The part is at the very rear of the intake manifold, and bolted to the manifold with 2 bolts. It looks somewhat like a large tuna can.

Just pick up a new one at the Ford dealer and replace it.

Ford calls it an "adaptor".

[Powerstrokedogg]

blue smoke is really only a sign of burning oil in a gasser.

the blue smoke your describing is either from retarded timing or low injcetor pop pressure, i had the same problem when i installed a new set of injectors in my truck, and they were delphi [img]/ubbthreads/images/graemlins/bleh.gif[/img]

try advancing your timing a couple degrees, it worked great for me

[cdnsarguy]

[ QUOTE ]
The smoke is blue and at idle smells somewhat of fuel

[/ QUOTE ]

Bing Bong.....anybody there........I would have the injectors tested, where did you get them........

[mbradley]

Thanks for all of the info. I assume injectors need to be bench tested ? Does someone make a wrench to get to the nuts on the pump or do I just modify a 9/16 ? I would guess there is a tool made to rotate the pump as well ? I got the injectors at Oregon Injection in Eugene OR. I hope I could find someone in the Portland area to test. Is there any way of testing on the vehicle. Running and crack the lines one at a time will drop that particular cylinder and if one is opened and a signifant miss does not occur that injector may not be functioning efficently ( again back to the old farm tractor method) , Is there any sense in going thru this routine ? The engine starts easily, if I try working with the timing, I assume from the info that has been provided I would want to start with a 2 to 3 degree advance, does this sound right ?
Thanks Again
Mike

[Powerstrokedogg]

they make a special wrench(half moon) and they make a special tool to turn it. you don't need either if your careful, take the high idle solenoid off(2 7/16" bolts) that will allow you to get to the bolt on the passanger side, then on the drivers side you might need to take the back bolt out of the timing cover this will allow you to get all the bolts with a regular combonation wrench, turn the pump so the top of it moves twoards the passanger side. move it just a little maybe so the timing lines on the pump and timing cover are seperated by 1/16" you can turn it by CAREFULLY grabbing it with a large pair of channel locks or a pipe wrench

this is a pretty back yard way to do it but it will get you by, you really should have it dynamically timed