Regular miss; suspect injector, need to drive 50 miles to Mech. - Ford Powerstroke Diesel Forum
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Old 08-14-2013, 01:08 PM
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Regular miss; suspect injector, need to drive 50 miles to Mech.

Hi all

I suspect I have a bad injector. Symptoms are:

- At first no CEL or SES light.
- rough, lopey idle on cold start
- blue smoke on cold start, puffs with accelerator, gradually clearing as warmed. No smoke when hot, on or off turbo; load/no load. No smoke at hot start.
- regular miss at all rpm's warm or hot.
- down on power, but still drivable, even on steep grade.
- unburned diesel smell, strong when cold, fades but still there when warm

What I have done: (don't have AutoEnginuity kit yet)
- Checked all connectors to injections system; I pulled valve covers on both sides, reseated the conections under the valve covers and inspected for breaks/burns. Did 50 cent mod as prevention.
- Did not start engine at any time with covers off (I just found out that I could do some injector testing that way)
- After all the above, SES light now activated
- checked for blow-by at oil filler cap - none that I could detect; actually seemed to have a bit of vacuum

What I suspect:
- leaking injector thinning oil on cylinder walls, leading to blue smoke out tail-pipe. As engine warms, more is fuel being burnt rather than washing cylinder. This would also account for strong/weak fuel odor.

My Question:
- Is this reasonably safe to drive about 50 miles to a mechanic?

Last edited by kjurkic; 08-14-2013 at 02:02 PM.
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Old 08-14-2013, 01:51 PM
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How many miles are on your last oil change? You may be OK if its been recent. You may have too high of diluted oil with fuel.

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Old 08-14-2013, 01:59 PM
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Oil dilution

Quote:
Originally Posted by hucorey View Post
How many miles are on your last oil change? You may be OK if its been recent. You may have too high of diluted oil with fuel.

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About 1000 miles since last oil change. Have not seen a significant increase in oil level on dipstick.

Approx 20 miles since this issue started.


OTHER NOTE: No crank-case blow-by as checked at oil filler cap

thanks
Ken
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Old 08-14-2013, 02:02 PM
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IMO. I think you'll be fine. I drove mine with a stuck wide open injector for 100 miles and was OK. But that's just me.

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Old 08-14-2013, 02:17 PM
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Leaky Injector (maybe)

Hi again.

Did you experience pretty much the same symptoms?

If I had more time available, I would wait for my AutoEnginuity to arrive and tackle the job myself, but we need this puppy back in service for field trips and shuttle runs.

I am making a list WYAIT jobs for the mechanic, since this is a company vehicle, and the other drivers are not so mechanically inclined.

I would guess that for the price, I should consider new under valve cover harness, glow plugs, gasket?

When I was in there, I noticed that a few of the injectors looked newer than the rest. Should I just bite-the-bullet and install a complete fresh set of 8 injectors? We need this thing rock-solid reliable and I have already cancelled 2 trips this summer due to mechanical problems.

thanks
Ken
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Old 08-14-2013, 03:23 PM
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Mine were s bit different as my injector was stuck open and bleeding by the oil side not fuel.

How many miles on the rig?

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Old 08-14-2013, 03:28 PM
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mileage

Quote:
Originally Posted by hucorey View Post
Mine were s bit different as my injector was stuck open and bleeding by the oil side not fuel.

How many miles on the rig?

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133,000 miles according to odo (I'm in Canada, but vehicle was bought used in US by previous owner)

Is it possible for oil side leak to work into cylinder, essentially choking combustion, producing the blue smoke until fully warmed?

K
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Old 08-14-2013, 03:50 PM
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Blue is going to be more fuel related. White/gray will be oil related. White/sweet smell will be antifreeze.
133k isn't really going to justify new injectors. Usually not even new O-rings if maintained properly.
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Old 08-14-2013, 05:23 PM
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Leaky Injector (maybe)

Quote:
Originally Posted by hucorey View Post
Blue is going to be more fuel related. White/gray will be oil related. White/sweet smell will be antifreeze.
133k isn't really going to justify new injectors. Usually not even new O-rings if maintained properly.
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Thanks for all the helpful/useful info; from my research, and this conversation, I am pretty confident that I can get the bus into town tomorrow, and that the repairs won't be megabux. (and hopefully this is not my epitaph )

regards

K
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  #10  
Old 08-15-2013, 05:03 AM
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Lol. Let us know what the quote is to fix it? We'll make sure your not overcharged as many of us do this work more than we wish.

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