All appears well so far..way better than before.

Passed smog too! (was big issue before)


But....I'll post #s tomorrow, didnt pass by far.


And I went thru the parts receipts..and I bought I think the wrong thermostat.


What known, documented effect, does a too low thermo have on emissions?

 

If engine temp is held too low, it may produce more soot, no?
They always make sure the car is properly warmed up at the test station.

Congrats on the smog, glad to know that intake refresh can do the job on that.

 

Low temp thermostat just means it opens sooner, it does not affect the engine operating temperature at all.

 

I'd be looking at air pump and cats and also did you warm up the car for at least 10 minutes prior to testing, preferably more?

 

You suck. My parts are still at Powder Coater. Probably won't get the car done until I get back from vacation in March. Not that I can drive it with all the salt on the roads but still . . .

 

Have you replaced the plastic Y-connector in the passenger side front wheel well?

It joins the lines for the emissions carbon canister, and is a common failure. New one costs about $4 from memory.

 

Nice job!! I'm in the same boat as Jeff -- part way through my refresh and won't be done for a month or so (scope creep!).

 

Have not..will get the liner off and check that likely the weekend after this one.


What failure mode do you see when thats busted?

 

you smell fuel inside the cabin when driving. its like $10. I changed mine 3 months ago. If you don't smell fuel vapors inside, go outside to the passenger side front wheel and try to see if you can smell fuel vapors from under the fender. I could smell it after I had driven the car or while driving, so drive it around then check for the smell. I was told its not important to change but I guess the smell of fuel vapors could be harmful for your health.

 

"this thread is wortless without pics"

Alright Jeff..I know you'll be at NASA this weekend and I am planning on visiting Saturday....so I hope to see that fancy powdercoated intake installed in person!!!!

 

It'll be there.

Bill Ball and I are going to rub baby harp seal oil over it for good luck Friday afternoon on the way up.


I'll get you a ride in the slow *** Pontiac too.

 

 

IIRC, when its busted, the car will run leaner at WOT and cruise (i.e. off-idle conditions), which will affect emissions (higher NOx due to leaner running).

The vacuum solenoid line is from a hole just past the throttle plate, so when you open the throttle, it gets vacuum and opens.

In addition, the line from the charcoal canister to the intake has a solenoid controlled by the LH which is activated based on temperature IIRC - once the engine is warmed, the LH will pulse the canister to suck gas vapors captured by the cylinder into the engine.

With a broken Y-connector, when the engine's warm and you're not idling, you thus have an unmetered air leak.

Idle speed shouldn't be affected, as at idle the throttle plate doesn't expose the vacuum line for the canister's valve (assuming stock vac line configuration).

edit: simple test would be to run the emissions test with the vac line to the canister valve disconnected and capped. If you're still injured that may be easier

 

When you've been idling for a while, the fans are pretty much governing the engine temperature - and their related thermo switch. The thermostat will most likely be open.

When you're cruising, the thermostat most definitely does control the engine operating temperature.

It's good to have the correct one in, as that will reduce fuel consumption a little.

What temperature thermostat did you buy?

 

Mark:

I goofed and got the 75C Wahler