2004 GMC Yukon Denali XL 6.0 V8
06-01-2022, 02:00 PM
#31
Junior Member
Posts like a Ricer Type-R
Thread Starter
Hi All,
Just an update i gave the suv to GM and after $225 told me the fuel tank pressure sensor is bad. They gave me a price of the sensor $91.83 and labor for installation $770.00 and if i want them to keep it and do a road test it goes up to $1,200 i told them to give the vehicle back to me and i will replace it my self which i will over the weekend and keep you all posted.
Thank you all who helped.
Just an update i gave the suv to GM and after $225 told me the fuel tank pressure sensor is bad. They gave me a price of the sensor $91.83 and labor for installation $770.00 and if i want them to keep it and do a road test it goes up to $1,200 i told them to give the vehicle back to me and i will replace it my self which i will over the weekend and keep you all posted.
Thank you all who helped.
06-01-2022, 10:48 PM
#32
Senior Member
True Car Nut
Road test that costs $430.00 ?
I've never heard of this before.
I've never heard of this before.
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carfixer007 (06-01-2022)
06-02-2022, 09:16 AM
#33
Retired
Certified Car Nut
Depending on labor rate, it does seem a little high, but to properly do the drive cycle a lot has to be done. And this can't be done just by having the tech drive it home at night, this will take a couple hours during shop time to do it right.
To perform an OBDII Driving cycle do the following:
- Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 50°C (122°F) and within 6°C (11°F) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.
- Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge “No Flow”, Misfire and if closed loop is achieved, Fuel Trim.
- Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 88km/hr (55mph) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.
- Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
- Decelerate. Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 32km/hr (20 mph). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.
- Accelerate. Accelerate at 3/4 throttle until 88-96 km/hr (55-60mph). This will perform the same diagnostics as in step 3.
- Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.
- Decelerate. This will perform the same diagnostics as in step 5. Again, don’t press the clutch or brakes or shift gears.
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06-02-2022, 10:55 AM
#34
Senior Member
True Car Nut
I've never heard of a shop doing drive cycles. They are far to unpredictable.
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CathedralCub (06-05-2022)
06-02-2022, 12:13 PM
#35
Retired
Certified Car Nut
The following 2 users liked this post by Mike:
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CathedralCub (06-05-2022)
06-05-2022, 05:29 PM
#36
Senior Member
True Car Nut
To perform an OBDII Driving cycle do the following:
- Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 50°C (122°F) and within 6°C (11°F) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.
- Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge “No Flow”, Misfire and if closed loop is achieved, Fuel Trim.
- Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 88km/hr (55mph) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.
- Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
- Decelerate. Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 32km/hr (20 mph). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.
- Accelerate. Accelerate at 3/4 throttle until 88-96 km/hr (55-60mph). This will perform the same diagnostics as in step 3.
- Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.
- Decelerate. This will perform the same diagnostics as in step 5. Again, don’t press the clutch or brakes or shift gears.
10-28-2022, 11:57 AM
#37
Junior Member
Posts like a Ricer Type-R
Thread Starter
Hi All,
I am still having the same issue with my truck showing the error code p0300. I have replaced the spark plugs, wires and coils and also put in cleaner through the engine but the code keeps coming back. I have already spent around $2,000 and now they are saying i need to do a top half overhaul due to carbon buildup and that will cost me a lot of money, any help would be much appreciated before i go the overhaul route.
Thank you all for all the help.
Hasib Khan
I am still having the same issue with my truck showing the error code p0300. I have replaced the spark plugs, wires and coils and also put in cleaner through the engine but the code keeps coming back. I have already spent around $2,000 and now they are saying i need to do a top half overhaul due to carbon buildup and that will cost me a lot of money, any help would be much appreciated before i go the overhaul route.
Thank you all for all the help.
Hasib Khan
10-28-2022, 03:36 PM
#38
Senior Member
True Car Nut
Hi All,
I am still having the same issue with my truck showing the error code p0300. I have replaced the spark plugs, wires and coils and also put in cleaner through the engine but the code keeps coming back. I have already spent around $2,000 and now they are saying i need to do a top half overhaul due to carbon buildup and that will cost me a lot of money, any help would be much appreciated before i go the overhaul route.
Thank you all for all the help.
Hasib Khan
I am still having the same issue with my truck showing the error code p0300. I have replaced the spark plugs, wires and coils and also put in cleaner through the engine but the code keeps coming back. I have already spent around $2,000 and now they are saying i need to do a top half overhaul due to carbon buildup and that will cost me a lot of money, any help would be much appreciated before i go the overhaul route.
Thank you all for all the help.
Hasib Khan
Carbon. Didn't someone here tell you to do a top end cleaning? Do you know what SeaFoam is?
10-28-2022, 11:28 PM
#39
Senior Member
True Car Nut
I'm still curious about the fuel pressure.
"top half overhaul" seems like one of those shotgun solutions that a shop would do when they can't find the problem.
Do they have evidence of carbon buildup or are they just guessing?
"top half overhaul" seems like one of those shotgun solutions that a shop would do when they can't find the problem.
Do they have evidence of carbon buildup or are they just guessing?
10-29-2022, 08:43 AM
#40
Senior Member
True Car Nut