Cold weather and smoke when starting

[16gaSxS]

I did the glow plug over ride several years ago and found that with the new plug you get more smoke, but when I push the button and let those quick heat heat up good and long I get minimal smoke. If It does smoke a bit just push the button and the smoke goes away.

[DennisG01]

I did the glow plug over ride several years ago and found that with the new plug you get more smoke, but when I push the button and let those quick heat heat up good and long I get minimal smoke. If It does smoke a bit just push the button and the smoke goes away.

I wish there was a way to do this with an OBII!

[SmithvilleD]

Does the PCM throw a code if the OEM glow plug relay is activated manually?

If that's a problem, couldn't you set up a separate relay to independently power the glow plugs with a push button?

I'd think the very common Ford starter relay would handle that amperage load OK. The same relay type that Robin suggested on the recent starter thread.

[DaveBr]

Hey EEMBRY

Has your truck every given you grief when it's hot and you shut it off for 15 - 20 mins. and try to restart it? Is it hard to start or it won't even start? If this has happened it could be a sign the IP is getting weak. This could also contribute to excess smoke when cold temps are happening.

[eembry]

Never any problems when warm or hot only cold.

[DennisG01]

sorry about the hijack, eembry - i'll start another thread.

[JohnC]

Does the PCM throw a code if the OEM glow plug relay is activated manually?

The PCM gets upset if it sees power to the glow plugs when it's not expecting it, or when it doesn't see power and it is expecting it. I think all years monitor the same line that powers the wait to start light. I suppose you couldisolate that, but a separate relay by itself would not do the trick.

[eembry]

Well I changed the fast idle a little to the fast side and thought I would see if it made any difference. Also changed the fuel filter. If I don't depress the accelerator it's not too bad with the smoke but if I depress the accelerator to set the advance and the fast idle look out it is smoke city. This has to give someone a clue as to what's going on here. I started to advance the timing a little to see if that would help but if when you depress the accelerator advances the timing and that makes the smoke worse would it be the same if you manually advance the timing or is it a different situation? I'm confused. I still think it is something simple because the truck runs too well and starts too well under warmer conditions. Could there be anything in the wiring harness that could be breaking down? What do you think?

Eddie

[Robyn]

I am suspect of the injector pop pressure being too low and the spray pattern being poor.

How many miles on the squirts??
Were these rebuilts or >>>?????

The issue of more smoke with throttle is about right as the amount of fuel increases too, hence more smoke..

What was the POP pressure set to??

Have you turned the IP slightly to advance the timing a tad ??

RC

[midniteplowboyy]

Is your cold idle/advance switch working? You should have 12v to the cold advance solenoid and high idle solenoid when engine temp is below 100ºF with ign sw on. If you have power, check to see if the advance solenoid clicks when you remove/apply power(might be a low voltage problem also).

I think it is in your cold advance system. Its been awhile since I had the top off of one of them, IIRC the advance solenoid restricts the fuel return outlet on the top of the pump, you might unscrew the return nipple and see if you notice anything wrong(seams like it has a pressure relief valve in it for when the solenoid has the main return blocked).

My 93, when the temp switch was bad, it would miss and blow alot of fuel smoke, untill it gradually warmed up. My 92 is a different animal though, it still cranks good without it, I think it works now(got me wondering, I'll have to check). 6.5's are like people, there's no two the same and they got there own personality.