Reduced Engine Power warning at track
#41
#42
Supporting Vendor
Check your fuses. We had a car do the same thing, and ended up being the MAF fuse. Weird.
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"Keeping You on Track!"
http://www.gspeed.com
877-512-5180
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GSpeed C7Z Cooling Development
2014 NASA Texas TT1 Champion
2015 NASA Texas ST1 Champion
2018 NASA TTU & TT3 National Champions
2019 NASA ST2 National Champion
2019 NASA Texas TT2 Champion
2020 SCCA Majors COTA GT2 pole sitter
2020 SCCA Trans Am Road Atlanta SGT Winner
2022 NASA National Champion ST2
2023 NASA National Champion ST2
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goshendad (06-26-2017)
#45
Had car at GM Service today. Code was P01060. Pontiac Michigan was contacted, Checked valve spring and intake runner per PIP5423. All good. Resolution: Replace Supercharger!! I am told that originally they thought a faulty MAP sensor would fix the problem but Tech Center is now saying no. Replacing the Supercharger has solved the issue per GM! They have to get their hands on one for me first. Assuming this will happen quick and my next Pocono track date is July 12th so time will tell if this fixes the "Reduced Engine Power" problem at 168mph.
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Tampa Tuning (06-28-2017)
#47
#48
#49
Safety Car
I'm not sure you read this thread before offering your "contribution". I could be wrong. What track are you running where your car throws a P0106 MAP code when going exactly 167 MPH in 5th at ~4,950 rpm?
#50
What code? 12-15 minutes? Temp related? Speed related? IMO the class action lawsuit is bullshit. I owned a 2016 Z06, tracked it a dozen times HARD and never had an overheating issue. This lawsuit isn't about the owners. It's some greedy lawyers looking to make some money. People who have never tracked their car OR who have NEVER had an overheating issue are signing on the dotted line. GM has supported me so far and although I'm a little frustrated I will remain confident that they will fix this. It's fun driving on a super speedway like Pocono and lapping the BMW's, Fords, Challengers and Porsche's. I will stick with this team for now.
The following 5 users liked this post by goshendad:
BEZ06 (06-29-2017),
Bill Dearborn (07-03-2017),
LagunaSecaZ06 (07-06-2017),
rikhek (06-29-2017),
Toysrus (08-21-2017)
#51
Tech Contributor
Member Since: Oct 1999
Location: Charlotte, NC (formerly Endicott, NY)
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I have been having an intermittent drop off in power that has occurred at the last 3 track events. At the Glen it occurred after 2.5 days of hard running and during last session the power would be down on one lap and back up on the next lap. At VIR the following weekend it also occurred at the end of 2.5 days and then it occurred after lunch on Monday at the VIR NCM event and continued until after lunch on Tuesday and then went away. I was hopping the GM Engineers would get a chance to data log what was happening but the car started running fine again and it didn't make sense to push them to data log nothing. When this first occurred last year at the Glen I thought it was due to the tires slipping on all 4 wheels and causing enough vibration the knock sensor was pulling timing. However, on Tuesday morning of the NCM event the engine ran fine for three laps after it warmed up and I suddenly felt the power go away as I rolled onto the throttle coming out of South Bend and going down the hill. It felt like the rear tires were slipping but it did the same thing coming out of the Oak Tree which is the next turn. At about 60 mph in 3rd the acceleration just seemed to reduce some. When it was doing this my top speed at the end of the back straight was dropping from 10 to 15 mph depending on what cars were in front of me. There were ones that I normally had no trouble passing that suddenly took much longer to pass.
There were no codes, no warning messages and the coolant and oil temps were in the mid 210s and mid 250s. Still one of the fastest cars on track so not a limp home type of thing where you become a hazard due to slow speed.
Bill
There were no codes, no warning messages and the coolant and oil temps were in the mid 210s and mid 250s. Still one of the fastest cars on track so not a limp home type of thing where you become a hazard due to slow speed.
Bill
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LagunaSecaZ06 (07-06-2017)
#53
Pro
I have been having an intermittent drop off in power that has occurred at the last 3 track events. At the Glen it occurred after 2.5 days of hard running and during last session the power would be down on one lap and back up on the next lap. At VIR the following weekend it also occurred at the end of 2.5 days and then it occurred after lunch on Monday at the VIR NCM event and continued until after lunch on Tuesday and then went away. I was hopping the GM Engineers would get a chance to data log what was happening but the car started running fine again and it didn't make sense to push them to data log nothing. When this first occurred last year at the Glen I thought it was due to the tires slipping on all 4 wheels and causing enough vibration the knock sensor was pulling timing. However, on Tuesday morning of the NCM event the engine ran fine for three laps after it warmed up and I suddenly felt the power go away as I rolled onto the throttle coming out of South Bend and going down the hill. It felt like the rear tires were slipping but it did the same thing coming out of the Oak Tree which is the next turn. At about 60 mph in 3rd the acceleration just seemed to reduce some. When it was doing this my top speed at the end of the back straight was dropping from 10 to 15 mph depending on what cars were in front of me. There were ones that I normally had no trouble passing that suddenly took much longer to pass.
There were no codes, no warning messages and the coolant and oil temps were in the mid 210s and mid 250s. Still one of the fastest cars on track so not a limp home type of thing where you become a hazard due to slow speed.
Bill
There were no codes, no warning messages and the coolant and oil temps were in the mid 210s and mid 250s. Still one of the fastest cars on track so not a limp home type of thing where you become a hazard due to slow speed.
Bill
The issue is caused by air in the IC reservoir. I had my dealer bleed as much air out of my system as they could and so far my issue seems to have temporarily disappeared, but I don't think it's fixed.
There is a detailed thread on this that was started by GSpeed who documented this issue last year.
#54
Burning Brakes
I have been having an intermittent drop off in power that has occurred at the last 3 track events. At the Glen it occurred after 2.5 days of hard running and during last session the power would be down on one lap and back up on the next lap. At VIR the following weekend it also occurred at the end of 2.5 days and then it occurred after lunch on Monday at the VIR NCM event and continued until after lunch on Tuesday and then went away. I was hopping the GM Engineers would get a chance to data log what was happening but the car started running fine again and it didn't make sense to push them to data log nothing. When this first occurred last year at the Glen I thought it was due to the tires slipping on all 4 wheels and causing enough vibration the knock sensor was pulling timing. However, on Tuesday morning of the NCM event the engine ran fine for three laps after it warmed up and I suddenly felt the power go away as I rolled onto the throttle coming out of South Bend and going down the hill. It felt like the rear tires were slipping but it did the same thing coming out of the Oak Tree which is the next turn. At about 60 mph in 3rd the acceleration just seemed to reduce some. When it was doing this my top speed at the end of the back straight was dropping from 10 to 15 mph depending on what cars were in front of me. There were ones that I normally had no trouble passing that suddenly took much longer to pass.
There were no codes, no warning messages and the coolant and oil temps were in the mid 210s and mid 250s. Still one of the fastest cars on track so not a limp home type of thing where you become a hazard due to slow speed.
Bill
There were no codes, no warning messages and the coolant and oil temps were in the mid 210s and mid 250s. Still one of the fastest cars on track so not a limp home type of thing where you become a hazard due to slow speed.
Bill
You are a candidate to get the intercooler reservoir drained then vacuum filled. I bet you have a big bubble on top of the reservoir.
#55
Pro
Found the PDR file from the last track day where I had the car go into "Engine Power Reduced" and it threw a P0106 MAP code.
The session was a bit longer than the clip shown here. What you see is Lap 5 and then at the end of Lap 6 the car reduces power for no apparent reason.
Here are the engine stats...
The session was a bit longer than the clip shown here. What you see is Lap 5 and then at the end of Lap 6 the car reduces power for no apparent reason.
Here are the engine stats...
#56
Found the PDR file from the last track day where I had the car go into "Engine Power Reduced" and it threw a P0106 MAP code.
The session was a bit longer than the clip shown here. What you see is Lap 5 and then at the end of Lap 6 the car reduces power for no apparent reason.
https://youtu.be/WLkeb8CoOH0
Here are the engine stats...
The session was a bit longer than the clip shown here. What you see is Lap 5 and then at the end of Lap 6 the car reduces power for no apparent reason.
https://youtu.be/WLkeb8CoOH0
Here are the engine stats...
#57
Instructor
Interested in seeing if a defective supercharger is the culprit. I too am suffering from the same issue and am taking the car to the dealer today. Let's see what they diagnose.
#58
Supercharger is in! Replacing Tuesday, POCONO track day Wednesday. We will know pretty quick! FYI- another member has the same issue and Dealer replaced his MAP sensors. Did NOT work!
#59
Instructor
#60
Team Owner
the reason why this doesn't happen on a dyno. The dyno maxes out at 150 mph. Meaning everyone is on the dyno in 4th gear. There's only 4 dynos that this could be tested on and since software updates don't allow pulls over 150 there's no 5 th gear pulls to test. Maybe someone can call dyno jet and fix this.
This is issue is happening on a 5th gear pull!
This is issue is happening on a 5th gear pull!