Chevy evap

[vr4]

[quote=""Chris GTO TT""]P2404 2013 FRS. I'm thinking it might be the vacuum pump on the Charcoal canister. Of course that likely means we have to drop the diff [/quote]

I can't find anything that doesn't involve using the oem scanner to actuate testing.

Basic tests are confirm proper power, ground, and wire integrity to the ldp. If all those check out it's either the ldp or pcm. That's where you need the scanner to command the ldp to verify the pcm is good.

[Chris GTO TT]

So we might have to bite the bullet and pay someone to diagnose it. Thanks for looking into it for me.

[Jeff V.]

Does Techstream work with the FRS? I have a copy, and it works with a Tactrix adapter...

[DCIV]

Just trying to diagnose.

I unplugged the electrical and hose from the evap on the intake. Then capped it off on the intake side. My hope is to just see if it’s causing the misfire.

I drove it into town and back, about 20 mins. No misfire but no codes either for the unplugged evap. It took two days the last time and then it went crazy and wouldn’t quit. So I’m gonna drive it a couple days and see what it does. New o2 sensor comes in tomorrow. It was suppose to Friday but didn’t.

Hopefully this is my fix.


Coop

[DCIV]

75 miles, driven in the rain, no miss. So now just get the block off and flashed. Get the o2 swapped, finish the spark plugs.


Coop

[DCIV]

I spoke too soon!!!!! So add, only missing when it rains!


Coop