HELP!!

[jguzman75]

I have a 2000 X 7.3 diesel 70,000 miles and lately I have noticed that on some start up the engine runs like a cummings. It sounds really load and the knocking is very noticeable. What I have to do is turn it off and on a few times and it somehow fixes itself. This morning I went to fire it up and there was alot of blue and white smoke coming out of the tailpipe and it sounded horrible. I had to turn it off 5-6 times for to run normally. I have replaced the Cam Position Sensor because I thought that was the problem. Has this happend to anyone else? I only have 3,000 miles on this oil change and I usually change it every 4,500-5,000 miles. Another thing I notice is that if you drive it, there is absolutly no power, engine shakes, but very little smoke out the tailpipe. The morning I started it up and it ran like this with alot of smoke was the first time it ever did it on a cold start up. Every time this has happend it has been run for a while and is at operating temperature. I remember one time it had sat for about 3 hours and when I went to start it and the engine was running like this I just opened the hood, opened the water seperator and viola the engine settled down and ran perfect. I hope all of this info helps. Thanks

 

[BIG JOE]

I have a 2000 X 7.3 diesel 70,000 miles and lately I have noticed that on some start up the engine runs like a cummings. It sounds really load and the knocking is very noticeable. What I have to do is turn it off and on a few times and it somehow fixes itself. This morning I went to fire it up and there was alot of blue and white smoke coming out of the tailpipe and it sounded horrible. I had to turn it off 5-6 times for to run normally. I have replaced the Cam Position Sensor because I thought that was the problem. Has this happend to anyone else? I only have 3,000 miles on this oil change and I usually change it every 4,500-5,000 miles. Another thing I notice is that if you drive it, there is absolutly no power, engine shakes, but very little smoke out the tailpipe. The morning I started it up and it ran like this with alot of smoke was the first time it ever did it on a cold start up. Every time this has happend it has been run for a while and is at operating temperature. I remember one time it had sat for about 3 hours and when I went to start it and the engine was running like this I just opened the hood, opened the water seperator and viola the engine settled down and ran perfect. I hope all of this info helps. Thanks

You don't say anything about any Mods.... But just takeing a Stab at it:

Blue & White smoke is un-burned fuel, indicating a Glow Plug Relay (GPR) issue. A couple cylinders are not getting pre-heated by the glow plugs, or none.. are getting the proper heat, hence, the smoke, noise and shakeing.

It also sounds like you have Air in the fuel. (By opening the W/seperator, you purged some air.)

Could be "ALL OF THE ABOVE". I lean toward Air in the fuel... after setting over night, or a couple hours.

Tell us a bit more about yer engine.



JOE

 

[jguzman75]

2000 Excursion Limited PSD 4X4 Green/Tan 5" Superlift Selectride, Bilsteins, 35" BFG A/T, 16X10 Eagle Alloys, 3.73 gears, 203 Thermostat Turbo back 4" Banks Exhaust, 5" tip, Superchips Power Programmer,K&N Cold Air Intake,DVD system,2 SAVV and 1Audiovox LCD monitors, Custom Bumper,4 KC Hilites

 

[roosterdiesel]

Have you scanned for codes?

 

[jguzman75]

No SES light and just to make sure I put the code reader on it and nothing. I removed the Superchips Program and ran it stock for a while and put it back today and it hasn't happened yet.

 

[roosterdiesel]

Have you checked your glow plug wiring to make sure everything's tight since it's intermittent?

Oh and welcome to SDD!

 

[jguzman75]

No, I didnt even know where to start but that reminds me. Right after I purchased the vehicle, 2yrs ago, the SES light came on and it was the #3 glow plug circuit broken, I reset the code and it never came back. Could this be something?

 

[roosterdiesel]

It's definitely GP related.

 

[jguzman75]

Would this cause air in the lines somehow? I have posted this several areas and some have suggested air.

 

[BIG JOE]

Would this cause air in the lines somehow? I have posted this several areas and some have suggested air.

No, a GP related problem would'nt cause an Air In The Fuel issue. But a loose or defective fuel connection would.

Fer starters: There is a QD type fitting on the rear of yer fuel pump that is known for letting air get into the fuel supply. Just replace that fitting with a 8" piece of fuel line and 2 band clamps..... 10 bucks. Easy fix.

JOE