2 Identical 1.8L engines except for one thing...

[soupersonic]

My wife and I both just bought two 2014 Sonics, Mine is a hatchback and hers is the sedan.
I noticed my hatchback has something different on the engine even though they are the same 1.8L Ecotec engines.
Would someone have any idea what the extra equipment is on my hatchback engine? See pics....
Thanks!

 

[krakenredbeard]

Subbed for curiosity lol.

 

[River_Rat]

Appears to be CA emissions-spec secondary air injection.

 

[$ub$onic]

Appears to be CA emissions-spec secondary air injection.

This

 

[Natesriv]

 

[barch88]

It's emission crap. I had same thing

I ripped it all out and deleted code with trifecta tune

There is my engine bay


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[Blue hedgehog]

I thought sometime in the early 2000s the federal emissions standards became the same as Cali emissions. Or did Cali get even stricter since then?

 

[River_Rat]

CARB is certainly more stringent than EPA, and will likely continue to be so for the foreseeable future.

 

[Swordsmith]

Both cars seem to be missing the turbocharger, and have oversized cylinders. Also, I believe they may be missing 6th gear. Therefore, the prefix "eco" seems misplaced, this is clearly the less eco of the two engine possibilities!

Get the coil cover replaced with one that says "saved a little money on the engine, spending it all on extra gasoline."

Sigh, that came out meaner than I wanted it to, the 1.8NA is a perfectly fine engine that doesn't get horrible mpg. Maybe a smilie will help show I'm just kidding (mostly) :*)

 

[$ub$onic]

When your coming from a truck that gets 15 on a good day. 35 mpg is Eco.....

 

[soupersonic]

Thanks everyone. I was leaning towards emission equipment too. Both cars were bought in California so I wonder why one has more emission systems on it than the other.

 

[SuperFudd]

My California 2013 1.8L (see below) has that extra stuff.

 

[Swordsmith]

You could do some science for us; find somewhere with a nice long stretch of moderately hilly road where you can set the cruise control and go for a long ways, both directions. Drive both cars and check the mpg for that stretch only, see what if any effect the extry emission junk has.

Then, unless it's "none at all", remove it!

 

[$ub$onic]

You could do some science for us; find somewhere with a nice long stretch of moderately hilly road where you can set the cruise control and go for a long ways, both directions. Drive both cars and check the mpg for that stretch only, see what if any effect the extry emission junk has.

Then, unless it's "none at all", remove it!

I am curious about this myself.

 

[krakenredbeard]

I bet the car without it was a transfer from out of state.

 

[SuperFudd]

Maybe it improves mpg.
I get better mpg than I was led to believe.

 

[krakenredbeard]

If I remember correctly sai that Cali uses is actually taking exhaust gasses and rerunning it through the intake post filter. That's very disturbing to me.

I'd love to see a comparison if throttle bodies say after 75,000 miles I bet the one with sai is way worse than the one without.

 

[barch88]

It's called a secondary air injection system btw...


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[krakenredbeard]

It's called a secondary air injection system btw...


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Notice i used the initials sai

 

[River_Rat]

That would be EGR (exhaust gas recirculation). Secondary air injection (smog pump) does quite the opposite. It pumps fresh filtered air into the exhaust right after the manifold to aid in combustion of unburnt hydrocarbons and also warm up the catalytic converter. This typically occurs for 30-40 seconds upon cold start.