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Removed Catless downpipe for Inspection. qyuestion???

6K views 17 replies 10 participants last post by  RedRush 
#1 ·
I had to remove my catless downpipe and put on the stock in order to get the car to pass Virginia state inspection.. My only concern is driving on my custom freektune before I get the catless pipe put back on after inspection. Would I run into any issues with this or should I flash back to an OTS tune and not run the freektune? Thanks in advance.
 
#2 ·
I would flash the cob stage 0 tune for inspections if they are going to smog your car.
 
#3 ·
Ya luckily Virginia does not smog so I am good there, just worried about engine issues without reflashing to a different tune
 
#4 ·
This question comes up a lot surprisingly. It's very simple folks - yes, by taking parts off your car that you are 'tuned' for, you will need to change your tune as YOU NO LONGER HAVE THAT PART ON YOUR CAR. It could be going from stage 3 to stage 2, 1 to 0, etc. It also might be time to order an update for a custom tune. It's not too hard to comprehend.
 
#7 ·
And finding the right insert and doing the drive cycle ...still can't get the o2!sensors to ready after trying small/medium insert with the 6758. I'm open to suggestions!


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#11 ·
Drive Cycle Procedure

Purpose of
Drive Cycle Procedure
Drive Cycle
Preparation 1. Install scan tool. Turn key on with the engine off. Cycle key off, then on. Select appropriate Vehicle & Engine qualifier. Clear all DTC's/ Perform a PCM Reset. Bypasses engine soak timer. Resets OBDII Monitor status.
2. Begin to monitor the following PIDs: ECT, EVAPDC, FLI (if available) and TP MODE.
Start vehicle WITHOUT returning to Key Off.
3. Idle vehicle for 15 seconds. Drive at 64 Km/h (40 MPH) until ECT is at least 76.7°C (170° F).
Prep for Monitor Entry 4. Is IAT within 4.4 to 37.8°C (40 to 100° F)? If Not, complete the following steps but, note that step 14 will be required to "bypass " the Evap monitor and clear the P1000. Engine warm-up and provide IAT input to the PCM.
HEGO 5. Cruise at 64 Km/h (40 MPH) for up to 4 minutes. Executes the HEGO monitor.
EVAP 6. Cruise at 72 to 104 Km/h (45 to 65 MPH) for 10 minutes (avoid sharp turns and hills) Note, to initiate the monitor: TP MODE should =PT, EVAPDC must be >75%, and FLI must be between 15 and 85% Executes the EVAP Monitor (If IAT is within 4.4 to 37.8° (40 to 100°F))
Catalyst 7. Drive in stop and go traffic conditions. Include five different constant cruise speeds, ranging from 40 to 72 Km/h (25 to 45 MPH) over a 10 minute period. Executes the Catalyst Monitor.
EGR 8. From a stop, accelerate to 72 Km/h (45 MPH) at 1/2 to 3/4 throttle. Repeat 3 times. Executes the EGR Monitor.
SEC AIR/CCM (Engine) 9. Bring the vehicle to a stop. Idle with transmission in drive (neutral for M/T) for 2 minutes. Executes the ISC portion of the CCM.
CCM (Trans) 10. For M/T, accelerate from 0 to 80 Km/h (o to 50 MPH), continue to step 11. For A/T, from a stop and in overdrive, moderately accelerate to 80 Km/h (50 MPH) and cruise for at least 15 seconds. Stop vehicle and repeat without overdrive to 64 Km/h (40 MPH) cruising for at least 30 seconds. While at 64 Km/h (40 MPH) , activate overdrive and accelerate to 80 Km/h (50 MPH) and cruise for at least 15 seconds. Stop for at least 20 seconds and repeat step 10 five times. Executes the transmission portion of the CCM.
Misfire & Fuel Monitors 11. From a stop, accelerate to 104 Km/h (65 MPH). Decelerate at closed throttle until 64 Km/h (40 MPH) (no brakes). Repeat this 3 times. Allows learning for the misfire monitor.
Readiness Check 12. Access the ON-Board System Readiness (OBDII monitor status) function on the scan tool. Determine whether all non-continuous monitors have completed. If not, go to step 13. Determines if any monitor has not completed.
Pending Code Check and Evap Monitor "Bypass" Check 13. With the scan tool, check for pending codes. Conduct normal repair procedures for any pending code concern. Otherwise, rerun any incomplete monitor.
Note: if the EVAP monitor is not complete AND IAT was out of the 4.4 to 37.8° C (40 to 100° F) temperature range in step #4, or the altitude is over 2438 m. (8000 ft.), the Evap "bypass" procedure must be followed.
Proceed to step 14. Determines if a pending code is preventing the clearing of P1000.
Evap Monitor "Bypass" 14. Park vehicle for a minimum of 8 hours. Repeat steps 2 through 12. DO NOT REPEAT STEP 1.
 
#14 ·
I had Stratified leave my monitors all on, and when I went catless with the Vibrant J defouler and medium insert, I haven't got a CEL. I've only driven about 100 miles, but they were all short drives to warm the car up and get some datalogs, with the exception of a 60 mile round trip to go to a restaurant and back home.

Your car must hate you.
 
#15 · (Edited)
Are your o2 monitors "ready" tho? Stock turbo?

Edited for typo

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