nineoneone

I have a 87 Carrera and during inspection the HC would spike and cause my car to fail. Now, Last yr it passed with flying colors, this yr it will not pass. I have even put on a New catalytic converter and it fails. Just the hc's everything else is purrrfect. The tech put it on diagnose and the hydros spike ever so often........... Any help would be greatly appreciated. New test next week maybe it's that machine?

Bill Verburg

WAG, a misfiring sparkplug

Steve Weiner-Rennsport Systems

Good WAG,......Also, check ALL plug wires/connectors for continuity.

nineoneone

Thank you guys. New wires,cap,rotor last yr. will check all again. Wag?

Steve Weiner-Rennsport Systems

WAG=wild-***-guess,....

Make sure that the oxysensor and its wiring are perfect. Cycling between open-loop & closed-loop can do the same thing.

nineoneone

lol, Thanks Steve.

Shark Attack

"WAG" i had the exact same question.....