FAILED my first emissions test
07-30-2014, 03:28 PM
#11
Senior Member
07-30-2014, 05:18 PM
#13
Have you been doing mixed city and HWY driving? It needs both for all checks to take place.
So I reread what you posted and think something else is up. It's really weird that you wouldn't get a check engine light after a month and have all those not ready. Tell us what your driving consists of and how you drive your truck.
So I reread what you posted and think something else is up. It's really weird that you wouldn't get a check engine light after a month and have all those not ready. Tell us what your driving consists of and how you drive your truck.
08-01-2014, 12:08 AM
#14
Senior Member
Are you tuned?
08-01-2014, 01:04 AM
#16
Senior Member
Try removing it. The tune might be disabling the computer from learning (non-technical term meaning the transmission and engine will not deviate from what 5 star programmed) which could make it were it can't complete the tests.
08-01-2014, 08:49 AM
#17
F150 Forum
OBD drive cycle
The purpose of the OBD2 drive cycle is to let your car run on-board diagnostics. This, in turn, allows monitors to operate and detect potential malfunctions of your cars’s emission system. The correct drive cycle for your car can vary greatly depending on the car model and manufacturer. Also, the monitor in question affects the required drive cycle.
Today, many vehicle manufacturers include these drive cycles in the vehicle owner’s manual. Typically, a few days of normal driving, both city and highway, will make the monitors ready. The following generic drive cycle can be used as a guideline if a specific drive cycle is not known. It will assist with resetting monitors when a car specific drive cycle is not available. However, it may not work for all cars and monitors.
The drive cycle can be difficult to follow exactly under normal driving conditions. Therefore, it is better to drive it in restricted area!
1. The universal OBD-II drive cycle begins with a cold start (coolant temperature below 50 C /122 F, and the coolant and air temperature sensors within 11 degrees of one another). This condition is easily achieved by letting the car to sit overnight.
2. The ignition key must not be left on prior to the cold start. Otherwise the heated oxygen sensor diagnostic may not run.
3. Start the engine and idle the engine in drive for two and half minutes, with the A/C and rear defroster on if equipped.
4. Turn the A/C and rear defroster off, and accelerate to 90 km/h (55 mph) under moderate, constant acceleration. Hold at a steady speed for three minutes.
5. Decelerate (const down) to 30 km/h (20 mph) without braking or depressing the clutch for manual transmissions.
6. Accelerate back to 90-100 km/h (55-60 mph) at 3/4 throttle. Hold at a steady speed for five minutes.
7. Decelerate (const down) to a stop without braking.
To avoid being rejected in the annual inspection, you can prepare your car for it yourself. Do not wait until the annual inspection with your issues. If the check engine light comes on, read the diagnostic trouble codes and engine status immediately. It could save you a lot of time as well as future repair and fuel costs. You can do all this with OBD Auto Doctor diagnostic software. You can read all the monitors statuses even with the free version. Try the software now!
The purpose of the OBD2 drive cycle is to let your car run on-board diagnostics. This, in turn, allows monitors to operate and detect potential malfunctions of your cars’s emission system. The correct drive cycle for your car can vary greatly depending on the car model and manufacturer. Also, the monitor in question affects the required drive cycle.
Today, many vehicle manufacturers include these drive cycles in the vehicle owner’s manual. Typically, a few days of normal driving, both city and highway, will make the monitors ready. The following generic drive cycle can be used as a guideline if a specific drive cycle is not known. It will assist with resetting monitors when a car specific drive cycle is not available. However, it may not work for all cars and monitors.
The drive cycle can be difficult to follow exactly under normal driving conditions. Therefore, it is better to drive it in restricted area!
1. The universal OBD-II drive cycle begins with a cold start (coolant temperature below 50 C /122 F, and the coolant and air temperature sensors within 11 degrees of one another). This condition is easily achieved by letting the car to sit overnight.
2. The ignition key must not be left on prior to the cold start. Otherwise the heated oxygen sensor diagnostic may not run.
3. Start the engine and idle the engine in drive for two and half minutes, with the A/C and rear defroster on if equipped.
4. Turn the A/C and rear defroster off, and accelerate to 90 km/h (55 mph) under moderate, constant acceleration. Hold at a steady speed for three minutes.
5. Decelerate (const down) to 30 km/h (20 mph) without braking or depressing the clutch for manual transmissions.
6. Accelerate back to 90-100 km/h (55-60 mph) at 3/4 throttle. Hold at a steady speed for five minutes.
7. Decelerate (const down) to a stop without braking.
To avoid being rejected in the annual inspection, you can prepare your car for it yourself. Do not wait until the annual inspection with your issues. If the check engine light comes on, read the diagnostic trouble codes and engine status immediately. It could save you a lot of time as well as future repair and fuel costs. You can do all this with OBD Auto Doctor diagnostic software. You can read all the monitors statuses even with the free version. Try the software now!
08-01-2014, 09:51 AM
#18
Senior Member
Thread Starter
You might be on to something. I contacted 5 star and they did recommend returning the truck to stock and then putting 5 drive cycles on it before retesting.
08-01-2014, 11:00 AM
#19
Yes return to stock for about everything you have to do then go back to the tune for fun.
