Check Engine Light
Thread Starter
Instructor
Joined: Nov 2004
Posts: 217
Likes: 0
From: Fort Lauderdale, FL 140 & Still More Pedal
Check Engine Light
02 6 speed vert.
The light came on while I was accelerating on the highway. The DIC did not throw any new codes???
Any suggestions as to what it could be would be greatly appreciated.
Mike
The light came on while I was accelerating on the highway. The DIC did not throw any new codes???
Any suggestions as to what it could be would be greatly appreciated.
Mike
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If it came on and then went off OR came on and flashed, you could be expiercing engine misfire. That would be a P0300 code. The code is only present during misfire or it will set a code if it detects XXX (dont know the exact number) of engine misfires.
Give it a couple of full throttle rend in high gear (heavy load) and see if youbget a steady CEL light or a flashing CEL.
Bill C
Give it a couple of full throttle rend in high gear (heavy load) and see if youbget a steady CEL light or a flashing CEL.
Bill C
Race Director
Joined: Jul 2004
Posts: 16,795
Likes: 62
From: Lake Havasu City, AZ
The number one cause of check engine light as cited by mechanics is a loose gas cap!
Check that first....
If that is the cause it can take up to a couple days of driving to reset itself
Check that first....
If that is the cause it can take up to a couple days of driving to reset itself
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If you have a CEL, you should have codes, There are very few things that wont set codes. One is an engine misfire. I'm going to drive the Z06 to work thismorning with a loose gas cap and see what code it sets! 
BC
BC
Le Mans Master
Joined: Mar 2004
Posts: 5,562
Likes: 5
From: South East coast Florida
I also have experienced this phenomenum twice on the 1/4 mile track. Third gear (MN6) and a hard pull. Actual slight drop in power for a second, then the light goes out and power is restored. When I checked for codes, nothing....I will add, I have had a Dyno tune so I do not have the stock PCM Programming
I've had the Gas Cap and it does set a code and retains it in history (H). Need to manually reset them.
Engine misfire seems interesting. What could produce that, and how many before the CEL is illuminated. Thanks for the input
signed,
Perplexed
I've had the Gas Cap and it does set a code and retains it in history (H). Need to manually reset them.
Engine misfire seems interesting. What could produce that, and how many before the CEL is illuminated. Thanks for the input
signed,
Perplexed
Last edited by mowton; Dec 29, 2005 at 08:18 AM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Well,,,,,,,,I drove the car to work (7 miles) with the gas cap ready to fall off and it didnt throw any codes! I did have some cold idle isues when I first started the engine with the cap off.
Bill
Bill
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Drifting
Joined: Oct 2003
Posts: 1,540
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From: bloomfield nj
1-it's a 2 drive cycle fault[it has to fail the evap test twice to turn on the mil]
2-the evap test will only run with the fuel between 3/4 and 1/4 tank of fuel.anymore or less and the pcm won't do the test.also there are a couple of other inputs needed to make the pcm do the test[throttle angle/road speed/run time/etc.]
2-the evap test will only run with the fuel between 3/4 and 1/4 tank of fuel.anymore or less and the pcm won't do the test.also there are a couple of other inputs needed to make the pcm do the test[throttle angle/road speed/run time/etc.]
Drifting
Joined: Oct 2003
Posts: 1,540
Likes: 0
From: bloomfield nj
Originally Posted by Bill Curlee
Well,,,,,,,,I drove the car to work (7 miles) with the gas cap ready to fall off and it didnt throw any codes! I did have some cold idle isues when I first started the engine with the cap off.
Bill
Bill
bill-for ha-ha's check for faults,if the car did the evap test,you should have the fault stored[it just doesn't know if the fault is current yet]even though the mil is still off