surging

[Cobrajet]

I have a 99 7.3 PSD and when I first start the truck it surges for about
thirty seconds or until i hit the gas pedal. It's only does it when the
truck sits or if it's around thirty degrees. I scaned it and found no
codes, also the cam sensor was replaced last year??????

[super_stroke]

yeah mine does it to. i think its normal. it shouldnt do it when its pluged in. does it?

[hancockcowboy]

when yall say surging do you mean running at a high idle?

[99Smokin73Stroker]

I think he means that when he first starts it when it's cold enough outside that the motor will idle up and down almost like a seriously lopey cammed out drag car ya know? If so, I don't think it's anything out of the ordinary. I own a 99 as well and mine does it if it's cold enough or if I haven't plugged it in or driven it for a day or so. I tap the gas pedal just enough and it will then idle at a more constant rpm. So it shouldn't have anything to do with a cam sensor....It's just a cold weather thing...

[bradfordboatworks]

Originally Posted by Cobrajet

I have a 99 7.3 PSD and when I first start the truck it surges for about
thirty seconds or until i hit the gas pedal. It's only does it when the
truck sits or if it's around thirty degrees. I scaned it and found no
codes, also the cam sensor was replaced last year??????

what kind of oil are ya using and how long since it was changed

[Cobrajet]

I have been using Rotella 15w40 and I change it every 5000 miles.

[bradfordboatworks]

well i gues thats not the problem, some of the cheaper oils have been causing that problem when to weather gets cold

[99Smokin73Stroker]

As the old saying goes, you get what you pay for!

[22crazy]

my 00 7.3 surges when driving i have a banks six gun on top of a hypertech programmer the banks shows the fuel rate change with the surge i replaced cam sensor, fuel pump, fuel regulator, checked oil pressure at highpressure oil pump. could this be an injector fading in and out, and if so would it not shoe a fault code???????