RyanRGS
Member
- Thread starter
- #1
Hello!
I am fairly new to this forum and this is my first post! My name is Ryan and I have enjoyed and learned a lot so far from reading many threads and posts. My apologies if this thread should have been part of an existing one that I did not find.
I have a 2015 GT Premium S550 that is pretty much stock aside from aftermarket, MBRP Cat Back exhaust. I just had a Whipple Gen 5 3.0L Supercharger (and WOW! huge gains). I do have an issue however that is becoming a mystery.
After the engine is warm and after about 15 minutes of normal city driving, the idle speed get wonky. It revs from about 750RPM all the way up to 1600PRM. This fluctuation mostly stays around 1600RPM but occasionally drops down to between 900 and 1100RPM, then climbs back up to 1600RPM, then back down again. This cycle lasts about 15 seconds and constantly repeats.
We smoke tested for leaks, Whipple thinking it may be an exhaust leak. Turns out, smoke from the test was pouring out of the throttle body right at the sensor. long story short, Whipple send a new, replacement TB. I just had it installed today and tested it out on the way home from the shop. The Issue Remains. After the engine was warm and after a couple of stop lights, the revs as described above continue. I saw a post in regards to one suggestion that Whipple said to make magnet adjustments within the TB but, that was an older model as Whipple explained to me and that apparently would not apply to me and the Gen 5 model.
Would anyone have any suggestions on what to try next?? ( I am in consultation with my shop and Whipple still at this point but wanted other expert opinions on troubleshooting..?).
I am fairly new to this forum and this is my first post! My name is Ryan and I have enjoyed and learned a lot so far from reading many threads and posts. My apologies if this thread should have been part of an existing one that I did not find.
I have a 2015 GT Premium S550 that is pretty much stock aside from aftermarket, MBRP Cat Back exhaust. I just had a Whipple Gen 5 3.0L Supercharger (and WOW! huge gains). I do have an issue however that is becoming a mystery.
After the engine is warm and after about 15 minutes of normal city driving, the idle speed get wonky. It revs from about 750RPM all the way up to 1600PRM. This fluctuation mostly stays around 1600RPM but occasionally drops down to between 900 and 1100RPM, then climbs back up to 1600RPM, then back down again. This cycle lasts about 15 seconds and constantly repeats.
We smoke tested for leaks, Whipple thinking it may be an exhaust leak. Turns out, smoke from the test was pouring out of the throttle body right at the sensor. long story short, Whipple send a new, replacement TB. I just had it installed today and tested it out on the way home from the shop. The Issue Remains. After the engine was warm and after a couple of stop lights, the revs as described above continue. I saw a post in regards to one suggestion that Whipple said to make magnet adjustments within the TB but, that was an older model as Whipple explained to me and that apparently would not apply to me and the Gen 5 model.
Would anyone have any suggestions on what to try next?? ( I am in consultation with my shop and Whipple still at this point but wanted other expert opinions on troubleshooting..?).
Sponsored
