Start up Smoke

***907DAVE*** · #1 Thu, January 7th, 2010, 08:59 PM

What color is the smoke?

zeuss · #2 Thu, January 7th, 2010, 09:12 PM

Mostly white, but got to admit a lil blue. truck doesn't seem to use any oil. smells like somone is dumping staight diesel out when smoking. this happens for about 8 to 12 minutes.

***cleatus12r*** · #3 Thu, January 7th, 2010, 09:48 PM

My truck has always smoked for the first 5-10 minutes after a sub 15 degree start. It was -31 here today and it started right up.....but smoked pretty good until I left the house 20 minutes later. I've also got 130K on my truck and it DOES need injectors.

The glow plugs are on for 120 seconds when the engine is that cold. Once they turn off, the engine is relying on compression heat to burn the fuel efficiently.

The smoke, if it smells like raw diesel fuel, IS unburned fuel. The stock setting on the chip DOES NOT use the original PCM for anything.

I replaced the glow plugs in my friend's truck about a month ago....even though they tested fine by every measure of the word. The difference in cold starting is night and day.

zeuss · #4 Thu, January 7th, 2010, 10:00 PM

Quote:

Originally Posted by cleatus12r

My truck has always smoked for the first 5-10 minutes after a sub 15 degree start. It was -31 here today and it started right up.....but smoked pretty good until I left the house 20 minutes later. I've also got 130K on my truck and it DOES need injectors.

The glow plugs are on for 120 seconds when the engine is that cold. Once they turn off, the engine is relying on compression heat to burn the fuel efficiently.

The smoke, if it smells like raw diesel fuel, IS unburned fuel. The stock setting on the chip DOES NOT use the original PCM for anything.

I replaced the glow plugs in my friend's truck about a month ago....even though they tested fine by every measure of the word. The difference in cold starting is night and day.

Does this problem I am having sound like a injector issue. It seems to me if I am still getting 15 to 17 this time of year they can't be to bad. I will also say that I am on my 3rd relay in 12,000 miles. So I wondered if even though they tested good there could be a problem. ( More resistance equals more aamps) I didn't ask how they tested them. I have thought about changing them anyway.

zeuss · #5 Thu, January 7th, 2010, 10:02 PM

I will also see what happens in mornig without chip in. This is the first winter I had the chip in and also the first winter I had this problem.

***907DAVE*** · #6 Thu, January 7th, 2010, 10:48 PM

Like Cody said, the glow plugs are off after 2min or less and should not cause excessive smoke after a few minutes............ but there is definitely an issue there if you keep changing relays.

My truck and many other trucks I have been around have always smoked for quite a while when cold.

Does anyone know how long the Air Intake heater stays on for?

Might be worth looking into.

zeuss · #7 Thu, January 7th, 2010, 11:08 PM

Quote:

Originally Posted by 907dave

Like Cody said, the glow plugs are off after 2min or less and should not cause excessive smoke after a few minutes............ but there is definitely an issue there if you keep changing relays.

My truck and many other trucks I have been around have always smoked for quite a while when cold.

Does anyone know how long the Air Intake heater stays on for?

Might be worth looking into.

I had resistance tonite on the aih. I don't think the aih comes on while the gpr is actuated though.

***907DAVE*** · #8 Thu, January 7th, 2010, 11:17 PM

No.... but it's intent was to reduce cold engine emissions...