i ChangeD the DriversValve CoverGasket On My 98 6.5 And Chaged The Fuel Filter. I Got Tge Truck Restarted And Let It Idle A Few.Minutes And Drove It For 20 Minutes, Now I Have Drove It Back And Forth To Work A Few Times(15Minutes But It StillHard Starts Doesn'tMatter Cold Or Hot. It Takes About 8 SecondsBefore It FIres Up

 

Did you damage the glow plug controller/relay or forget to solid mount it?
It grounds through the base and must be fastened down.

 

I Didnt Remove It I Have A Post In The Distres Section With More Info I Think It Needs Tdco Relearn Going To Dealer Tomorrow To TrY That Sry Bouth The Cap Its A Droid

 

Have you jump started truck lately? Sometimes overboosting by using quick start will fry glow plug system.

 

Might also be starting in limp mode from a bad CPS/OS?
Should code with that though.

Aftermarket CPS are junk out of the box-AC Delco ONLY!

 

It Starts ExactLy The SaMe Cold Or Hot. It Takes 8 Revolutions Then fires Right Up

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If disconnect The Optical Sensor The Truck Wont StaRt At All But The Cps Doesn't Seem To MaTter

 

CPS is dead then I would expect-should be a service engine soon light,trouble code stored.

BWD CPS are often bad right out of the box,so special order AC Delco if need be.

 

Doesn't The Cps have T Have The Relearn Procedure done

 

Some say a TDCO relearn should be done after a CPS replacement but I didn't after doing mine and no adverse affects-it's up to you if you can do it yourself or if there is a big expense involved.

I have the scan tools and procedures to do it myself and still didn't bother,but I changed out a failing Delco for a new Delco-might be different if your last relearn was done with an aftermarket CPS and your new one is a Delco?

 

I have this exact same problem after a CPS replacement. it was a BWD.