Probable CPS Issue ?
05-14-2021, 01:58 PM
#1
Racer
Thread Starter
Probable CPS Issue ?
Greetings , first post in the 986 Forum ……spent most of my time in the 928 Forum as an owner from around 2005-2012. Ditched that front loaded V8 for the nibble 986 about 9 years ago , search has been my friend along with Google but on this one I am hoping to get some insight.
MY1999 Base with about 60k on the clock. Fires up and runs great when cold , once it heats up it will stumble under a light load from about 2500-3000 in all gears then smooth out , lots of missing all banks during that time. Come to a stop , clutch in / neutral and the idle will drop below 800 and die maybe 70% of the time , other times it will kick back up. It will always start back up , sometimes a goose to the throttle will keep it going. I am thinking CPS Sensor , even though it always fires up , once heated up it exhibits these signs pretty consistently. I am hoping its not an electrical gremlin , dealt with enough of those on the 928 to last a lifetime. New CPS is in route , looking for any insight others may have who have experienced similar. Thanks guys !
MY1999 Base with about 60k on the clock. Fires up and runs great when cold , once it heats up it will stumble under a light load from about 2500-3000 in all gears then smooth out , lots of missing all banks during that time. Come to a stop , clutch in / neutral and the idle will drop below 800 and die maybe 70% of the time , other times it will kick back up. It will always start back up , sometimes a goose to the throttle will keep it going. I am thinking CPS Sensor , even though it always fires up , once heated up it exhibits these signs pretty consistently. I am hoping its not an electrical gremlin , dealt with enough of those on the 928 to last a lifetime. New CPS is in route , looking for any insight others may have who have experienced similar. Thanks guys !
05-14-2021, 05:59 PM
#4
How old are the o2 sensors? What about plugs/coils?
this might help: https://www.renntech.org/topic/32676...7-p1318-p1319/
or this one: http://986forum.com/forums/boxster-g...ult-codes.html
have you cleared the codes and then see if they come back?
this might help: https://www.renntech.org/topic/32676...7-p1318-p1319/
or this one: http://986forum.com/forums/boxster-g...ult-codes.html
have you cleared the codes and then see if they come back?
05-15-2021, 04:51 PM
#5
Rennlist Member
Greetings , first post in the 986 Forum ……spent most of my time in the 928 Forum as an owner from around 2005-2012. Ditched that front loaded V8 for the nibble 986 about 9 years ago , search has been my friend along with Google but on this one I am hoping to get some insight.
MY1999 Base with about 60k on the clock. Fires up and runs great when cold , once it heats up it will stumble under a light load from about 2500-3000 in all gears then smooth out , lots of missing all banks during that time. Come to a stop , clutch in / neutral and the idle will drop below 800 and die maybe 70% of the time , other times it will kick back up. It will always start back up , sometimes a goose to the throttle will keep it going. I am thinking CPS Sensor , even though it always fires up , once heated up it exhibits these signs pretty consistently. I am hoping its not an electrical gremlin , dealt with enough of those on the 928 to last a lifetime. New CPS is in route , looking for any insight others may have who have experienced similar. Thanks guys !
MY1999 Base with about 60k on the clock. Fires up and runs great when cold , once it heats up it will stumble under a light load from about 2500-3000 in all gears then smooth out , lots of missing all banks during that time. Come to a stop , clutch in / neutral and the idle will drop below 800 and die maybe 70% of the time , other times it will kick back up. It will always start back up , sometimes a goose to the throttle will keep it going. I am thinking CPS Sensor , even though it always fires up , once heated up it exhibits these signs pretty consistently. I am hoping its not an electrical gremlin , dealt with enough of those on the 928 to last a lifetime. New CPS is in route , looking for any insight others may have who have experienced similar. Thanks guys !
05-15-2021, 07:14 PM
#6
Racer
Thread Starter
How old are the o2 sensors? What about plugs/coils?
this might help: https://www.renntech.org/topic/32676...7-p1318-p1319/
or this one: http://986forum.com/forums/boxster-g...ult-codes.html
have you cleared the codes and then see if they come back?
this might help: https://www.renntech.org/topic/32676...7-p1318-p1319/
or this one: http://986forum.com/forums/boxster-g...ult-codes.html
have you cleared the codes and then see if they come back?
Last edited by sjfarbs; 05-15-2021 at 07:16 PM.
05-17-2021, 03:30 PM
#7
Racer
Thread Starter
As expected , it was a wiring issue. There had been some previous wire repairs due to rodent damage , and those repairs were starting to come undone. Found them , repaired them and the issues have stopped she is running good !
The following users liked this post:
pilot4fn (05-18-2021)