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Message: Exhaust popping/spitting update (EDITED)

Changed By: Laz
Change Date: April 22, 2016 03:53PM

Exhaust popping/spitting update (EDITED)
Some time ago I posted about the excessive (I felt) popping/splatting/spitting coming from the exhaust during one-two upshifts. A reminder: it didn't strike me as being the more pleasant burbling/crackle one hears in various demo videos. Also, it developed after maybe 10,000 miles or so. Starting in January, the car has had a few uncharacteristic stumbles and uneven fast-to-normal idle episodes. EDIT: [i]when cold, except one time a longer crank to start when warm.[/i]. Next week the car goes in for a final, pre-warranty expiration servicing and've asked the dealer to see if they can find something amiss. There hasn't been a CE light. Anyway, a couple weeks ago I figured I'd try some form of "dry gas" just in case the car got some bum fuel lately. I put in Heet, (yellow bottle) when the tank was maybe ⅓ full and ran it down. Those odd idle episodes were few and far between, so although there hasn't been a recurrence, perhaps it helped. I added another bottle with the next fill-up. What I [i]have[/i] noticed is the popping/spitting business barely happens now. There's a product called Iso-Heet that also claims to clean injectors, etc., but as my dealer always adds some sort of stuff with each oil change, I figure it's best to leave it at that. After the servicing (next week) I'll add another yellow bottle with the next fill-up. Oh, I don't think it could be a change in summer/winter fuel formulations, as this has been going on irrespective of seasons.

By the way, Gold Eagle, the company that makes Heet, also makes STA-BIL, and I find that stuff works really well: my snow blower, a Honda 4-stroke, only has a pull start, yet at each first use kicks over after 3 pulls at most. At the end of the season I just add STA-BIL, run the machine for 10 minutes so the treated gas gets into the carb system, and top off the tank.

Original Message

Author: Laz
Date: April 22, 2016 03:28PM

Exhaust popping/spitting update
Some time ago I posted about the excessive (I felt) popping/splatting/spitting coming from the exhaust during one-two upshifts. A reminder: it didn't strike me as being the more pleasant burbling/crackle one hears in various demo videos. Also, it developed after maybe 10,000 miles or so. Starting in January, the car has had a few uncharacteristic stumbles and uneven fast-to-normal idle episodes. Next week the car goes in for a final, pre-warranty expiration servicing and've asked the dealer to see if they can find something amiss. There hasn't been a CE light. Anyway, a couple weeks ago I figured I'd try some form of "dry gas" just in case the car got some bum fuel lately. I put in Heet, (yellow bottle) when the tank was maybe ⅓ full and ran it down. Those odd idle episodes were few and far between, so although there hasn't been a recurrence, perhaps it helped. I added another bottle with the next fill-up. What I [i]have[/i] noticed is the popping/spitting business barely happens now. There's a product called Iso-Heet that also claims to clean injectors, etc., but as my dealer always adds some sort of stuff with each oil change, I figure it's best to leave it at that. After the servicing (next week) I'll add another yellow bottle with the next fill-up. Oh, I don't think it could be a change in summer/winter fuel formulations, as this has been going on irrespective of seasons.

By the way, Gold Eagle, the company that makes Heet, also makes STA-BIL, and I find that stuff works really well: my snow blower, a Honda 4-stroke, only has a pull start, yet at each first use kicks over after 3 pulls at most. At the end of the season I just add STA-BIL, run the machine for 10 minutes so the treated gas gets into the carb system, and top off the tank.