Smog Readiness

[Wreckinball67]

Hello all,
Need advice with emissions. My 98 K1500 has less than 1000 miles since I installed a new GEP motor last year. Runs great but had to have it smogged and I was told the OBDII readiness monitors were "not ready". Apparently there are not enough drive cycles. I'm having difficulty finding information about this particular vehicle. I have tried doing some drive cycles as seen on YouTube but, of course they are generic. I have a Bluetooth scan device which shows codes and the like. SES light is off but, while driving I keep getting a pending code for the EGR saying flow is low.

EGR is new when motor was installed as well as the EGR solenoid, vacuum pump. Intake was completely cleaned with new motor.

I did have a "misfire" monitor that needed to be reset, which it finally did.
Every time I clear the pending codes it seems like I have to start over. The "misfire" monitor will again say "not ready". It eventually completes its test but, by that time the pending EGR code is back.

Not sure if the drive cycles are taking place if there are pending codes. Also, if I clear the pending codes am I also deleting the accumulated drive cycles?

 

[Will L.]

Yes, everytime you clear codes wether by batteries disconnected or computer —
You are restarting drive cycle. That is for any rig

 

[Wreckinball67]

Got it, I was thinking that was what was happening. Will the drive cycles progress if there are "pending codes"?
Thanks Will

 

[Will L.]

Oh, be cautious. The GEP valve cover sticker for military EMISSIONS EXEPT has had many people denied. If you forgot to install the emissions approved non sticker valve cover which is exactly the same :the gm cover and the gep sticker

 

[Will L.]

Nope. You have to solve the problem, then clear code, then drive cycle.

 

[Wreckinball67]

There's no military sticker, this motor was specifically built from scratch for me except it's the HD version which, I hope isn't causing me issues now.

 

[Will L.]

It’s not a military sticker- it is a GEP sticker. On top of driver’s side valve cover.
Some places don’t care, some places act like the sticker means the engine is different.

No clue about low egr flow if you are getting proper vacuum- did you measure it?
Bad egr or wastegate solenoid? Map sensor?

 

[Wreckinball67]

There's 9 inches of mercury to the EGR and MAP sensor at idle. All solenoids were replaced at the time of the new motor.

 

[Will L.]

New parts don’t always mean working parts. New defective happens more now than 10 years ago.
Test them

 

[Wreckinball67]

Roger that!