help with these readings and vibration while in gear

xj2202009

Original poster
Member
Mar 27, 2012
105
Hi,
I have been dealing with this vibration for a while. The truck idles fine but as soon as put it on drive or any gear it vibrates. I clean the throttle body and put new spark plugs.

The Images below is what I captured from the Torque app. Could someone explain what these reading means. I noticed in the 02bank1 there was alot of motion however on the 02bank2 was very little.
my understanding is 02 readings is the voltage going into the o2 sensors and the fuel/trim is what the sensors are reading. I am at 111k miles.

the 02 bank 2 was flatlined at 8 for about 95% of the 25 miles drive.

any feeback will be highly aprreciated.


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jeffro312

Member
Oct 4, 2012
442
East Haven,Ct
I can't help Much other then letting you know the post cat sensor voltage should stay pretty steady

Pre cat jumps about once per second up down up down.

Passing on roadies great advice he gave me before.

Dunno if it helps but there's my 2cents



Vibration while in gear not in nuetral or park sounds to be motor mounts
 

The_Roadie

Lifetime VIP Donor
Member
Nov 19, 2011
9,957
Portland, OR
Your O2 sensor readings are as expected. Fuel trims are a concept that's been discussed here, but good tutorials are found on other sites that Google will lead you to.

If the vibration is a 10 Hz rotational vibration that you can see pretty clearly on the intake manifold (1/4" to 3/8" in amplitude), that is indeed motor mounts. Another repair that's been discussed here and on trailvoy.
 

xj2202009

Original poster
Member
Mar 27, 2012
105
Thank you for all the feed back I did not know where these readings were suppose to be.
Updates since the post:

I did a throttle body relearn(if that's the right term) and since then the activity on the Bank2 02 sensor have increased tremendously, were I have seen it flatline at the bottom.

I was persuing the motor mount issue and ran into people having similar issue and turning out to be a bad hanger on the exhaust system. While on break; I took a peak and found something leaking from the exhaust system where the CAT meets the rest of the exhaust junction. It was not oil nor did it smell like oil, I had the transmission rebuild back in February and after this is when this vibration have come to play. I will futher investigate when I get home. I'm thinking they did not put that gasket back in.

Also can I recharge the motor mounts and with what if I can?View attachment 27765
 

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xj2202009

Original poster
Member
Mar 27, 2012
105
Took the truck to the shop this wknd, for that 0496 error and the vibration. The Mechanic shook the rear half of the exhaust and with a light push it banged against the chassis behind the wheel. A bang I have heard a couple off times during hard braking. What is the exhaust hanger of choice? Autozone/discount autoparts part or dealer item?

IS this a reputable source:
Chevy Wholesale Parts -

BTW: the 0496 seems that the dealer gave me a bad purge valve solenoid or I have an open circuit on the purge valve solenoid.
 

xj2202009

Original poster
Member
Mar 27, 2012
105
replaced the purge canister solenoid and the vibration is gone and the performance is back.

Symptoms:

Vibrations initially started when put in gear then progressed to vibrating in park or neutral.
engine code 0594.
running sluggish.
hard to start after at the fuel pump after fueling
Location:
Strapped to lower side of engine on driver side.

Picked the part on eBay Adelco for $27 with shipping.
 

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