Maximum Turtles
New member
- Joined
- Feb 18, 2014
- Location
- Santa Rosa, CA
1992 240 B230F NA, automatic
It's smog time again, and this time things aren't going as smooth as usual. I took it in for the check and I failed for high HC @ 15mph, and passed but barely @ 25mph. NO and CO are both good, so I suspected ignition. I replaced cap, rotor, Volvo OE plugs and wires, checked manually for spark at each cylinder, check ignition coil resistances and decided I was probably good.
I drove the car real hard for about an hour, then brought it in for retest:
>Smog Results<
This time it failed EVAP and he noticed the preheat hose has been missing for 10 years. Got those replaced, but HC hasn't budged at all. What else can I look at? I'm on a really tight budget right now and I'm hoping the oxidation cat or oil leaking into the cylinder aren't the only solutions to this. Any ideas?
It's smog time again, and this time things aren't going as smooth as usual. I took it in for the check and I failed for high HC @ 15mph, and passed but barely @ 25mph. NO and CO are both good, so I suspected ignition. I replaced cap, rotor, Volvo OE plugs and wires, checked manually for spark at each cylinder, check ignition coil resistances and decided I was probably good.
I drove the car real hard for about an hour, then brought it in for retest:
>Smog Results<
This time it failed EVAP and he noticed the preheat hose has been missing for 10 years. Got those replaced, but HC hasn't budged at all. What else can I look at? I'm on a really tight budget right now and I'm hoping the oxidation cat or oil leaking into the cylinder aren't the only solutions to this. Any ideas?
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