Help with etest fail

[b1lk1]

Attached a scan of the paper, I'm thinking vacuum leak or thermostat opening too soon but am open to suggestions,

[ZR]

What is your combo?
What thermostat?
Base timing is at?

[BOOOSTD]

^^ What ZR said + age of fuel in tank

[Four cam slam]

Hydrocarbon, is unburnt fuel. Advance your base timing to about 18 degrees advanced initial. Leave your spout in. The extra ignition lead will also send your nox readings through the roof, but the new test doesnt read nox anyway.

[Tailites]

What thermostat?

ya...she needs to be hot...sometimes they stick open

if its doesnt get up to operating temps...the computer dumps fuel in

[b1lk1]

Combo is b-cam, edlerock performer, bbk70MM, factory ford 70MM MAF, GT40 heads, stock ignition, longtubes with catted x-pipe.

I'm thinking it's a combo of old gas and not hot enough, gonna change the thermostat no matter what. Timing was set to 10 to base spout out.

[Ponyryd]

With a cam it's hard to pass with a low idle, needs to be around 1000rpm.

[b1lk1]

I have it now set around 1100RPM, it was around 750 when tested.

[ZR]

I'd start with (assuming all emissions stuff is intact n hooked up)
190 stat
base timing at 4-5 deg
idle at 1000-1100
2ltrs methyl hydrate
fresh regular gas

I've got several guys running the above with a B cam and are passing with flying colors (shorties with cats vs your long tubes though).

[Tailites]

mine passed with a custom cam...then an F cam...

so its doable...dont sweat it...just get everything good...it WILL pass