Chevy HHR Network - Loss of Power, no crank

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kodythekasper

01-02-2019 09:28 PM

Loss of Power, no crank

I have a 2006 HHR 2.2L LS with 235K Miles. I currently have 4 codes with a no crank without throttling and as soon as the gas is released the engine dies. I just replaced all spark plugs and boots with coil to come next. Codes are P0455 Evap Large Leak, P0420 Catalyst efficiency below threshold bank 1, P0326 Knock Sensor 1 circuit range/ performnce bank 1 or single sensor, and P0300 cylinder Misfire.

Not the first time I've had misfire issues, which is why I replaced the plugs and boots already. I haven't been able to find a diagram or photo to explore the leak, I'm not sure which hoses to look at. Any help is appreciated!

Thanks!
Kody

Oldblue

01-03-2019 06:18 AM

https://www.chevyhhr.net/forums/prob...ge-leak-41961/

it it is the black box just up above the rear axle behind the fuel tank

donbrew

01-03-2019 08:53 AM

My vote is your catalytic converter is clogged up from the historic misfire.

fix the misfire first, then replace the cat.

What exactly does "no crank without throttling" mean?

Oldblue

01-03-2019 03:02 PM

It won’t fire up unless you press the throttle pedal.
Being a computer wire connections to control the throttle, seems strange .

Horsehaulin

01-03-2019 04:46 PM

You can test the CAT before replacing it. On previous vehicles with the condition you’re experiencing, I’ve picked a spot two or three inches ahead of the cat and drilled six 1/4-1/2 holes that a stainless steel exhaust band clamp could seal back up should that cat still be ok. I’ve had success both ways, diagnosing the plugged CAT and one time the CAT was fine and I was able to cover and seal the holes.

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