C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Cuts out Under WOT, help

Thread Tools
 
Search this Thread
 
Old May 25, 2013 | 12:29 PM
  #1  
03Zcrit's Avatar
03Zcrit
Thread Starter
Burning Brakes
10 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2013
Posts: 929
Likes: 82
From: San Jose CA
Default Cuts out Under WOT, help

Hello All, I just purchased an 03 z06 and of course a few days after it starts acting up. If I quickly go to WOT the car will accelerate to about 5k or so then the engine will cut as if I quickly took my foot off the pedal (or like the fuel or spark has been cut) and it won't re-engage until I take my foot off the pedal then re-apply, anyone heard of this? I can take the car to redline and it pulls great if I don't give it WOT.
Reply
Old May 25, 2013 | 01:31 PM
  #2  
03Zcrit's Avatar
03Zcrit
Thread Starter
Burning Brakes
10 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2013
Posts: 929
Likes: 82
From: San Jose CA
Default

Thanks, tried that but no codes came up. I am going to change the plugs and wires because I don't know the history on them and they may be original with 62k miles
Reply
Old May 25, 2013 | 05:50 PM
  #3  
Cybermind's Avatar
Cybermind
Melting Slicks
 
Joined: Apr 2009
Posts: 2,479
Likes: 36
Default

Check for vacuum leaks. I went through a similar issue and it ended up being caused by an air leak between the PCV and the intake manifold (small hose).
Reply
Old May 27, 2013 | 02:02 AM
  #4  
03Zcrit's Avatar
03Zcrit
Thread Starter
Burning Brakes
10 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2013
Posts: 929
Likes: 82
From: San Jose CA
Default

Thanks Cybermind, I'll check all the hoses going to and from the manifold.
Reply
Old May 27, 2013 | 01:48 PM
  #5  
martysauto's Avatar
martysauto
Drifting
10 Year Member
 
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
Default

Check the to sensor. Graphing it would be good. See if it has any drop outs or spikes. It should read over 4.0 volts at wot.
Reply
Old May 28, 2013 | 10:57 AM
  #6  
TBH94's Avatar
TBH94
Racer
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Jan 2005
Posts: 284
Likes: 29
From: Oxford PA
Default

This may sound crazy but is the traction control kicking in? Tire spin? Try shutting off the traction control and see if anything changes.
Reply
Old May 28, 2013 | 11:01 AM
  #7  
03Zcrit's Avatar
03Zcrit
Thread Starter
Burning Brakes
10 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2013
Posts: 929
Likes: 82
From: San Jose CA
Default

Not getting a traction control indication on the cluster so probably not. I just put in a new set of plug and destroyed one of the old wires taking them off so will have a new set tomorrow and will try the T.C. off in case the plugs and wires weren't the problem.
Reply
Old May 28, 2013 | 12:51 PM
  #8  
Cybermind's Avatar
Cybermind
Melting Slicks
 
Joined: Apr 2009
Posts: 2,479
Likes: 36
Default

Originally Posted by 03Zcrit
Not getting a traction control indication on the cluster so probably not. I just put in a new set of plug and destroyed one of the old wires taking them off so will have a new set tomorrow and will try the T.C. off in case the plugs and wires weren't the problem.
Keep in mind that normally, a misfire will cause the check engine light to flash. If you're not getting a flashing CEL or code, then it probably is not a misfire (caused by bad wires or spark plugs). It's always good to change the plugs and wires but, I still think you may have an air leak somewhere after the MAF.

Read my previous posts regarding my stalling issue. Not only was my engine sporadically cut-out but actually stalling at highway speeds. It would start right back up as if nothing happened. I had no codes and was ready to give up until I found a loose PCV hose right by the throttle body. It was barely hanging on. I replaced that and voila! My car has never driven better.

By the way, it cost me a new MAF and ignition switch before I found the real culprit. Oh well, it was a learning experience for me.

Last edited by Cybermind; May 28, 2013 at 12:57 PM.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old May 28, 2013 | 09:34 PM
  #9  
martysauto's Avatar
martysauto
Drifting
10 Year Member
 
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
Default

Originally Posted by martysauto
Check the to sensor. Graphing it would be good. See if it has any drop outs or spikes. It should read over 4.0 volts at wot.
Sorry, that should have read tp sensor. I did not catch the typo.
Reply
Old May 30, 2013 | 02:51 AM
  #10  
03Zcrit's Avatar
03Zcrit
Thread Starter
Burning Brakes
10 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2013
Posts: 929
Likes: 82
From: San Jose CA
Default

And the winner is.......

Originally Posted by Cybermind
I still think you may have an air leak somewhere after the MAF.
The previous owner had installed a smooth silicone connector going from the air bridge to the throttle body and got a bit overzealous on the hose clamps and there was a small gap in the air bridge that I think was what was causing the problem. You called it cybermind!
Reply
Old May 30, 2013 | 06:24 AM
  #11  
Cybermind's Avatar
Cybermind
Melting Slicks
 
Joined: Apr 2009
Posts: 2,479
Likes: 36
Default

Originally Posted by 03Zcrit
And the winner is.......



The previous owner had installed a smooth silicone connector going from the air bridge to the throttle body and got a bit overzealous on the hose clamps and there was a small gap in the air bridge that I think was what was causing the problem. You called it cybermind!
Glad it worked out for you!
Reply
Old May 30, 2013 | 09:22 AM
  #12  
Bill Curlee's Avatar
Bill Curlee
Tech Contributor
Supporting Lifetime Gold
Veteran: Navy
25 Year Member
Liked
Community Favorite
 
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Default

Originally Posted by martysauto
Sorry, that should have read tp sensor. I did not catch the typo.

Marty

Our C5s are Throttle By Wire and EXTREMELY critical when it comes down to Throttle Position Sensor operation.
If ANYTHING is wrong with the TAC, Throttle Position Sensor or Accelerator Pedal Position Sensor, it will set a DTC and frequently sets the PCM into (REDUCED POWER MODE).

BC
Reply

Get notified of new replies

To Cuts out Under WOT, help





All times are GMT -4. The time now is 01:33 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE