Still trying to find vaccum leak 92 stock SC 16.5 hg at idle. Idle is steady (not missing) but shaking and no power in drive or reverse. Took off cowl, clamped hoses, filled with 20psi of air, and did the soapy water test, did find minor leak, but not enough to make a difference. Just got check engine light on with DTC code 126 (KOEO) which means MAP out of range. Can MAP be cause leak or is it due to leak. manual implies 3.8L doesnt even have a MAP sensor. I know it should be on firewall passenger side if there is one, dont see it readiy. Please help? Thanks.