Idling issue - question

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Sep 30, 2014 | 11:23 AM

#21

enoniam

Pro

Joined: May 2014

Posts: 670

Likes: 46

From: Indiana

Quote:

Originally Posted by Sinister-one

The car runs great through the gears and even under hard acceleration.
As a matter of fact after I drop the hammer on it, it kind of clears ups for a good 15 minutes or so....

Maybe time to change the O2 sensors???

Sep 30, 2014 | 11:59 AM

#22

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Quote:

Originally Posted by enoniam

Maybe time to change the O2 sensors???

I was thinking about that this morning on the way into work....

Can an auto parts store pull the codes ??

Oct 1, 2014 | 11:26 AM

#23

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Did a little bit more cleaning of the throttle body and it seems to clearing up the idling issue.... but not quite fixed yet.

Oct 1, 2014 | 01:04 PM

#24

66dts-v

Drifting

Joined: Jan 2012

Posts: 1,883

Likes: 76

From: Portland OR

You can pull the codes yourself through the DIC.

Oct 1, 2014 | 10:13 PM

#25

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Quote:

Originally Posted by 66dts-v

You can pull the codes yourself through the DIC.

doing that in a few minutes....

Oct 1, 2014 | 11:06 PM

#26

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Okay, these are my codes....

PCM:
P0171 H C - Fuel Trim System Lean Bank 1

P0174 H C - Fuel Trim System Lean Bank 2

P0463 H - Fuel Level Sensor 1 Circuit High Voltage

Someone PLEASE tell me what this means....

Oct 1, 2014 | 11:22 PM

#27

Choreo

Le Mans Master

Joined: May 2006

Posts: 6,774

Likes: 363

From: Midland TX

Quote:

Originally Posted by Sinister-one

Might help...
https://repairpal.com/OBD-II-Code-P0171-and-P0174

Oct 1, 2014 | 11:37 PM

#28

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Quote:

Originally Posted by Choreo

Might help...
https://repairpal.com/OBD-II-Code-P0171-and-P0174

Okay so from what I read, the culprit could be my maf sensor is going bad....

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Oct 2, 2014 | 12:08 AM

#29

Choreo

Le Mans Master

Joined: May 2006

Posts: 6,774

Likes: 363

From: Midland TX

Quote:

Originally Posted by Sinister-one

Okay so from what I read, the culprit could be my maf sensor is going bad....

A possibility.

Both times I had a similar problem, it was the throttle body around where the butterfly closes that got gummed up - even more likely if you are running an aftermarket oil-impregnated filter. However, I never got any codes.

Oct 2, 2014 | 12:14 AM

#30

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Quote:

Originally Posted by Choreo

Without taking off the TB... I've already cleaned it. Looks like I'll have to take it off and clean the heck out of it !!

And yeah, I have an aftermarket oil-impregnated filter - K&N with my Vararam.
Maybe I should use a different filter as well.

Oct 2, 2014 | 11:39 AM

#31

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

I have a 90mm spare MAF... swapping it out tonight and lets see what happens.

Oct 7, 2014 | 01:39 PM

#32

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Looks like I'm buying a replacement MAF....

Oct 7, 2014 | 07:50 PM

#33

Z06ufgrad2002

Safety Car

Joined: Nov 2002

Posts: 4,394

Likes: 6

From: Melbourne FL

Quote:

Originally Posted by Sinister-one

Looks like I'm buying a replacement MAF....

Are you using an aftermarket oiled air cleaner?
Did you try cleaning your existing MAF ?

Oct 7, 2014 | 10:13 PM

#34

El original

Melting Slicks

Joined: Nov 2008

Posts: 3,146

Likes: 203

From: Edmonton Alberta, Canada

I have had same problem, low idle speed. Found extremely dirty air filter to be the culprit. Still took half and hour to get to proper idle speed after changing it out. I still think you have issues with your after market air filter.

Oct 8, 2014 | 09:43 AM

#35

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Quote:

Originally Posted by Z06ufgrad2002

Are you using an aftermarket oiled air cleaner?
Did you try cleaning your existing MAF ?

Throttle body was cleaned, MAF was cleaned and my K&N air filter was cleaned about 5 months ago.

Quote:

Originally Posted by El original

My K&N air filter was cleaned about 5 months ago.
I guess I could take everything apart this evening and check the air filter again......

Oct 10, 2014 | 01:31 PM

#36

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Replacement MAF arrives today. AND I'm off today ! Time to work on and clean up my baby !!

Oct 10, 2014 | 07:02 PM

#37

Sinister-one

Thread Starter

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Well hell !!!
Looks like I found my problem......

This small piece of vacuum hose has a nice hole in it !!

And it goes right here...

Would anyone know where I can get a replacement OR can I just use a piece of vacuum hose cut to size ?

Oct 10, 2014 | 07:09 PM

#38

73Corvette

Le Mans Master

Joined: Feb 2012

Posts: 6,644

Likes: 481

From: OK

Quote:

Originally Posted by Sinister-one

Well hell !!!
Looks like I found my problem......

This small piece of vacuum hose has a nice hole in it !!

Would anyone know where I can get a replacement OR can I just use a piece of vacuum hose cut to size ?

Good job man.....I would think just a nice tight fitting piece of vacum hose will fix you up.....