Preemtive maintenance

[Llia]

While not quite ready to dive into the intake manifold modifications to fix the PCV. I thought about other parts that also fail that are connected to the intake manifold. Seeing as I'm nearing 50k I want to see if replacing certain parts within that mileage interval will help extend the life of other more expensive components. It will also give me the ability to perform an autopsy on the used parts.

So
I bought these for my 2015 CHEVROLET SONIC 1.4L L4 Turbocharged

ACDELCO	25193343	PCV (Positive Crankcase Ventilation) Hose	$ 42.79
ACDELCO	55573017	Vapor Canister Purge Valve / Solenoid	$ 18.07

and these

HASTINGS FILTERS	LF643	Oil Filter	$ 5.58
STANT      17504	Locking Fuel Tank Cap	$ 8.20

First I will be trying to see if I'm getting any fuel trim anomalies over 8%
Then I will replace the items as see if the problem (if any) goes away.
I'm not expecting much but the parts are relatively cheap.

 

[Natesriv]

...ummmmm.....cough ..... cough.....

Preemptive......

cough..... hey! look over there!

 

[Llia]

Any other common failures?
Plug Boots?

Life expectancy of parts seems to be low. 50K isn't great but better sooner than later.
My PCV tube is thick with gunk as it is. I'll be happy once I get the catch can inline and replace the tube.

I'm thinking of making a CNC Tee that can utilize the snap/clip connector on the manifold. This way it will be easier to tap into the manifold vacuum than installing a throttle body spacer. I'll duplicate the port and the fittings from the Vapor line connection on the manifold that is by the throttle body. Only issue is there isn't a vacuum reservoir.

 

[Ponchoguy]

While not quite ready to dive into the intake manifold modifications to fix the PCV. I thought about other parts that also fail that are connected to the intake manifold. Seeing as I'm nearing 50k I want to see if replacing certain parts within that mileage interval will help extend the life of other more expensive components. It will also give me the ability to perform an autopsy on the used parts.

So
I bought these for my 2015 CHEVROLET SONIC 1.4L L4 Turbocharged

ACDELCO	25193343	PCV (Positive Crankcase Ventilation) Hose	$ 42.79
ACDELCO	55573017	Vapor Canister Purge Valve / Solenoid	$ 18.07

and these

HASTINGS FILTERS	LF643	Oil Filter	$ 5.58
STANT      17504	Locking Fuel Tank Cap	$ 8.20

First I will be trying to see if I'm getting any fuel trim anomalies over 8%
Then I will replace the items as see if the problem (if any) goes away.
I'm not expecting much but the parts are relatively cheap.

Stant usually has the contract for OEM caps for GM, although on some models (like my G6 convertible) Gerdes beat out Stant and got that contract instead.

I'd go with a Delco PF2257G oil filter or a Hengst, that's just me. The Delco filter is available at most Walmarts, I've seen it there.

 

[skurtov]

While not quite ready to dive into the intake manifold modifications to fix the PCV. I thought about other parts that also fail that are connected to the intake manifold. Seeing as I'm nearing 50k I want to see if replacing certain parts within that mileage interval will help extend the life of other more expensive components. It will also give me the ability to perform an autopsy on the used parts.

So
I bought these for my 2015 CHEVROLET SONIC 1.4L L4 Turbocharged

ACDELCO	25193343	PCV (Positive Crankcase Ventilation) Hose	$ 42.79
ACDELCO	55573017	Vapor Canister Purge Valve / Solenoid	$ 18.07

and these

HASTINGS FILTERS	LF643	Oil Filter	$ 5.58
STANT      17504	Locking Fuel Tank Cap	$ 8.20

First I will be trying to see if I'm getting any fuel trim anomalies over 8%
Then I will replace the items as see if the problem (if any) goes away.
I'm not expecting much but the parts are relatively cheap.

Ouch for that hose. I just got some transmission line and some pipe fittings, made my own for less than $20.

 

[Tormach]

For the pcv hose, you can also get Russel with the black braided nylon and SS reinforce line and fit it to the existing nylon plastic fit from the existing hose.

You can cut the old shrink off the fittings and fit them to the new hose. I did this prior to cutting it in half later and fitting up my catch can to it.

Sent from my XT1254 using Tapatalk

 

[Llia]

"Good News Everyone"

Well slightly good. As promised I did some fuel trim monitoring before and after the Purge Valve Solenoid Replacement on the intake manifold.

No codes before or after the replacement.

Long Term Fuel Trim @ Idle -14.8% (Rich)
With ACDELCO	55573017 Manufactured 05.01.2015

Long Term Fuel Trim @ Idle -09.4% (Rich)
With ACDELCO	55573017 Manufactured 08.02.2017

The manufacture date of the new part is pretty recent.
Best part is - - there is way less ticking in the engine bay now. :banana:

Next on my list
- Valve by the fuel tank
- Compression Check
- MAF Sensor
- O2 Sensor Replace. We have two O2 Sensors, correct?

Although -9% isn't that bad, it's still not prefect.

Diagnosing Engine Problems Using Fuel Trim
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Ouch for that hose. I just got some transmission line and some pipe fittings, made my own for less than $20.

It's not the hose that's important. It's the seals at the end of each fitting and the check valve at the turbo end that will deteriorate and need replacement.
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[Llia]

As vacuum drops when A/C is on and idle is raised. The fuel trim gets around -3%. I have yet to test it at 2500 rpm. The K&N filter I have inside my can is going to be a big pain to service. I'll probably get a different can by then.

Well so far the car is running much better. No more hesitation or random stumble at a light with the A/C on or off. I don't think I should be preaching that everyone change their parts on a whim at 40,000 Miles, but if you're experiencing poor performance and are not getting any codes you might want to peek at your fuel trims and possibly go hunting for faulty parts that may be leaking vacuum or otherwise malfunctioning.