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Backfire
Posted: Fri Sep 21, 2018 8:00 pm
by GonzoBard
I'm getting a backfire occasionally on a trailing throttle. The tappers have been checked. Is the cause air ingress somewhere in the exhaust system? What else might be the cause?
Re: Backfire
Posted: Fri Sep 21, 2018 8:57 pm
by SeanP
Check the exhaust for leaks
Are the carbs balanced
Are the carb butterflies working in unison left to right
Re: Backfire
Posted: Sat Sep 22, 2018 4:11 am
by GonzoBard
Thanks Sean, I'll take a look.
Re: Backfire
Posted: Mon Oct 08, 2018 4:31 am
by louis356
Exhaust. I remember when my 912 had a leaky exhaust and would do quite impressive BANG as I slowed down.
Quite the attention grabber
Re: Backfire
Posted: Wed Oct 10, 2018 9:14 pm
by GonzoBard
Thanks Louis, I've yet to take a look but that sounds like a good candidate.
Ian
Re: Backfire
Posted: Thu Oct 11, 2018 9:02 am
by Mike Smith
Get yourself a nice thick pad of Rag/Whatever and with it in your hand block off the tailpipe of the running engine
At this point, your wife should be under the car and she will identify where the Hissing Exhaust is leaking
Re: Backfire
Posted: Fri Oct 12, 2018 8:25 pm
by GonzoBard
Thanks Mike. My wife is always looking for an excuse to grub about on the garage floor, she will be delighted to help.
Re: Backfire
Posted: Mon Oct 15, 2018 11:15 am
by neilbardsley
GonzoBard wrote:Thanks Mike. My wife is always looking for an excuse to grub about on the garage floor, she will be delighted to help.
Funny that my wife is super keen to help on the car too. The more oil, fumes and dirt the better!