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I have a 99 Firebird with a 3800 series 2 I change out the…

Customer Question
I have a 99...

I have a 99 Firebird with a 3800 series 2 I change out the throttle position sensor change of clothes wires everything it's still not running right and it's putting out a code of 1221 and 15 15 what is the problem

Mechanic's Assistant: Does the vehicle hesitate during acceleration? Or maybe speed up suddenly when you aren't even hitting the gas?

Before it would run for about 10 miles and then it dies and then starts back up but it won't the gas pedal is not there I have no pedal

Mechanic's Assistant: Are you fixing your Firebird yourself? What have you tried so far?

I put a brain in it I put a electronic throttle position sensor throttle body plug and now it should not a code of 1120 12:20 1221 1515 1516 11:20 12:20 and it won't start

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

No that's it

Submitted: 10 months ago.Category: Chevy
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Answered in 6 minutes by:
9/27/2017
Chevy Mechanic: Gary, Chevy Technician replied 10 months ago
Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 18,026
Experience: 15 years GM master tech
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Welcome! My name is ***** ***** I will do my best to assist you with this problem.Ask me about added features such as phone contact anytime if you wish !

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Chevy Mechanic: Gary, Chevy Technician replied 10 months ago

what are the exact P codes set if you clear the codes then run the car ?

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