ok... assuming everything was good before JUST the tach install - and NOTHING other than the tach was installed (please let us know if anything else was done) - I am guessing electrical, where the coil is getting bad signal now.
Take the tach off and see if there is a change. M. ________________________________ From: KRnet <krnet-boun...@list.krnet.org> on behalf of Flesner via KRnet <krnet@list.krnet.org> Sent: Monday, December 12, 2022 9:11 AM To: Phillip Matheson via KRnet <krnet@list.krnet.org> Cc: Flesner <fles...@frontier.com> Subject: Re: KRnet> corvair engine help needed On 12/11/2022 11:52 PM, Phillip Matheson via KRnet wrote: So today I was running the engine to test a new tach and something broke. Everything was normal and WAM BAM the right side AFR went off scale lean. Now engine barely runs. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ While we are all "just guessing", lets start a lottery. I'm guessing it's something in the valve train, other than a single valve spring. Why would anything on a single cylinder make a 6 cylinder engine run that bad. Also, "WAM, BAM" sounds like something metallic under considerable stress to me, not an intake leak. Intake leaks don't usually happen instantaneously with a loud noise. I'm guessing you have something bad broke. And the answer is...................................... Larry Flesner
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