HELP!! 'Reduced engine power'

[LS1vette]

My 99 firebird has been going into reduced engine power right after start up, so i took it to the dealer and had them scan it an it came back as TAC throttle boy at fault. So i take the car home and remove the throttle body and find the hole inside of intake is black and the back of the throttle boy is black. Is this normal and does the throttle body need replace?

[BLLDOGG]

Re: HELP!! 'Reduced engine power'

the carbon build up is normal. clean it up while you have it all off. Unless you give the actual code, I can not really help. usually its the gas pedal position stuff but also the throttle body. you may have to replace it.

[LS1vette]

Re: HELP!! 'Reduced engine power'

I'm guessing the throttle body needs to be replaced because they wanted 900 to fix the problem.

[LS1vette]

Re: HELP!! 'Reduced engine power'

Dealer didnt list the coeds all the service sheet says that there where 5 throttle body codes stored in the pcm. Does this sound like the throttle body needs replaced?

[kristen]

Re: HELP!! 'Reduced engine power'

go get it scaned at autozone for free(if your ses light is on) any shop will make you get something that you really dont' need

[smithtim]

Re: HELP!! 'Reduced engine power'

Dealer didnt list the coeds all the service sheet says that there where 5 throttle body codes stored in the pcm. Does this sound like the throttle body needs replaced?

I don't think it is common to see the throttle body go bad as it is just an air passage; I would geuss one of those sensors in there has gone bad or get some build up on it and is not reading properly to the PCM (if it is an SES code it is usually from some needless sensor)...

but you need to get the correct DTC then use the link below to see what it means and figure out which part.. autozone will read it for you, like she listed above, but if you plan on owing a car for a while an Actron PocketScan Code Reader ($70ish) is worth having


http://forum.camarov6.com/showthread...ight=DTC+codes

[LS1vette]

Re: HELP!! 'Reduced engine power'

Finally had car scanned and heres what i came up with.
DTC P1120 Throttle Position (TP) Sensor 1 Circuit
DTC P1220 Throttle Position (TP) Sensor 2 Circuit
DTC P1221 Fuel Pump Secondary Circuit Low
DTC P1441 Evaporative Emission (EVAP) System Flow During Non-Purge
DTC P1515 Electronic Throttle System Throttle Position
DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

[00 Silver 6]

Re: HELP!! 'Reduced engine power'

i got the same light, i didnt do anything and it hasnt given me problems in a couple months

[LS1vette]

Re: HELP!! 'Reduced engine power'

i got the same light, i didnt do anything and it hasnt given me problems in a couple months

This light comes on every other day, so i need to fix it. It's annoying.

[00 Silver 6]

Re: HELP!! 'Reduced engine power'

yeah, mine was on a few times, and before i could fix it, the problem was gone

[CHEVYINSIDE]

Re: HELP!! 'Reduced engine power'

DTC P1441 Evaporative Emission (EVAP) System Flow During Non-Purge
this cod eusaly means that thew line running from the carcoal canister to the throttle body is stuck open . usally peices of the carcoil are stuck in the solinoid. i would check that first

[LS1vette]

Re: HELP!! 'Reduced engine power'

DTC P1441 Evaporative Emission (EVAP) System Flow During Non-Purge
this cod eusaly means that thew line running from the carcoal canister to the throttle body is stuck open . usally peices of the carcoil are stuck in the solinoid. i would check that first

I'll look into that but i still need some help with these codes.
DTC P1120 Throttle Position (TP) Sensor 1 Circuit
DTC P1220 Throttle Position (TP) Sensor 2 Circuit
DTC P1221 Fuel Pump Secondary Circuit Low
DTC P1515 Electronic Throttle System Throttle Position
DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance