Grounded WOT. curcuit...HELP.
Thread Starter
Racer
Joined: Jan 2005
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From: tomahawk wisconsin
Grounded WOT. curcuit...HELP.
Ok if I drive my car for about 30 minutes I get a check engine light and when I run the codes it comes back as a grounded wot curcuit. I replaced the tps and still the problem persists....anyone have any ideas? 
Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by ar91c4
Ok if I drive my car for about 30 minutes I get a check engine light and when I run the codes it comes back as a grounded wot curcuit. I replaced the tps and still the problem persists....anyone have any ideas?
RACE ON!!!
Thread Starter
Racer
Joined: Jan 2005
Posts: 315
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From: tomahawk wisconsin
i believe its a code 22 an yes it is a 91 and it did come up as a "grounded wide open throttle curcuit"...I cant remember for sure if its a code 22 but I can go check the codes again.I drove the car today and once again the light popped on and I reset the computer before I left home.
Le Mans Master
Joined: Oct 2003
Posts: 6,130
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From: seattle WA
Code 22, Throttle position Sensor (TPS) (LOW).Do you have a Helms manual(s)?
Good site for you;
http://www.c4vettes.com/ecm.htm
Good site for you;
http://www.c4vettes.com/ecm.htm
Race Director
Joined: May 2001
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Originally Posted by ar91c4
i believe its a code 22 an yes it is a 91 and it did come up as a "grounded wide open throttle curcuit"...I cant remember for sure if its a code 22 but I can go check the codes again.I drove the car today and once again the light popped on and I reset the computer before I left home.
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Without checking it? Did it correct the problem? A lot of things can "ground" a circuit other than a bad sensor.
Another worthwhile site: www.helminc.com
RACE ON!!!
Another worthwhile site: www.helminc.com
RACE ON!!!
Team Owner
Joined: Jan 2003
Posts: 20,322
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From: Summerland B.C. Canada
Don't know if this is good for year, but here it is anyways 
http://members.shaw.ca/corvette86/Code%2022.pdf
http://members.shaw.ca/corvette86/Code%2022.pdf
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Thread Starter
Racer
Joined: Jan 2005
Posts: 315
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From: tomahawk wisconsin
thanks.......i just ran the codes again with a scanner and also went through the diag. and the tps shows .096 at idle and goes all the way to 4.5 at wot. everything else looked good except the oxygen sensor showed lean.....
That's way off
Le Mans Master
Joined: Oct 2003
Posts: 6,130
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From: seattle WA
Do you have a Helms manual-it shows the trouble shooting sequence.
I think it may be different from my 87. For mine it says to check for an open or short to ground in CKTs 416 or 417. You really need the trouble shooting guide for a 91-because the end results for the 87-if no circuit problems are found it points to a faulty connection or ECM.
I think it may be different from my 87. For mine it says to check for an open or short to ground in CKTs 416 or 417. You really need the trouble shooting guide for a 91-because the end results for the 87-if no circuit problems are found it points to a faulty connection or ECM.
Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by ar91c4
thanks.......i just ran the codes again with a scanner and also went through the diag. and the tps shows .096 at idle and goes all the way to 4.5 at wot. everything else looked good except the oxygen sensor showed lean.....
RACE ON!!!
Thread Starter
Racer
Joined: Jan 2005
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From: tomahawk wisconsin
sorry guys I ment .96....also the car is not running lean....its ruinnin pig rich and its about 10.1 af. which I realy need to get figured out also.when the motor was built, the cam that was used had a 110 degree lobe sep. I have had tunning issues with this thing from the get go.
Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by ar91c4
sorry guys I ment .96....also the car is not running lean....its ruinnin pig rich and its about 10.1 af.
Originally Posted by ar91c4
everything else looked good except the oxygen sensor showed lean.....
RACE ON!!!
