Running lean

[Johngreg]

My car was driving good but punched a 3rd gear pull and something had come off. Then wideband said I’m running lean at 17.0. Scanned for codes and got
P2197 P
P2270 P
P2272 P
Also have a exhaust leak, how can I confirm where it’s from? And where should I look for the lean issue or first steps for both these issues.

 

[Johngreg]

Any help?

 

[cj428mach]

What makes you think you have an exhaust leak and what is your exhaust setup?

Passenger side mid pipe to manifold is common. If you have headers pretty much could be anywhere.

 

[Terminator Dave]

My car was driving good but punched a 3rd gear pull and something had come off. Then wideband said I’m running lean at 17.0. Scanned for codes and got
P2197 P
P2270 P
P2272 P
Also have a exhaust leak, how can I confirm where it’s from? And where should I look for the lean issue or first steps for both these issues.

Have you looked up those DTC codes, and if so, where are they?

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[Johngreg]

What makes you think you have an exhaust leak and what is your exhaust setup?

Passenger side mid pipe to manifold is common. If you have headers pretty much could be anywhere.

It just sounds very very loud at idle like there’s a exhaust leak. Setup is stock manifolds with bbk off road pipe and Borla stingers.

 

[Johngreg]

Have you looked up those DTC codes, and if so, where are they?

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P2197 OBD-II Trouble Code: O2 Sensor Signal Stuck Lean Bank 2 Sensor 1
P2270 O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2
P2272 O2 Sensor Signal Stuck Lean B2S2

 

[Terminator Dave]

P2197 OBD-II Trouble Code: O2 Sensor Signal Stuck Lean Bank 2 Sensor 1
P2270 O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2
P2272 O2 Sensor Signal Stuck Lean B2S2

Odd. Both banks. Have you tried resetting these codes?

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[01yellercobra]

Usually if it's both banks something else is wrong. Like a vacuum leak at the intake or something. Check for hoses that have popped off. As for the exhaust leak, you're going to to have to get under the car and listen. Sometimes you can see black soot around where it's leaking.

 

[Terminator Dave]

Odd. Both banks. Have you tried resetting these codes?

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There is an EGR tube tied into one exhaust manifold. There should be a picture on this site, as someone got a picture for me. Maybe that came off.

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[Johngreg]

Usually if it's both banks something else is wrong. Like a vacuum leak at the intake or something. Check for hoses that have popped off. As for the exhaust leak, you're going to to have to get under the car and listen. Sometimes you can see black soot around where it's leaking.

Sounds good. What’s the best way to check vacuum leak on these cars? Can I hook up a vacuum gauge?

 

[Johngreg]

Odd. Both banks. Have you tried resetting these codes?

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No I have not, these codes just came and it’s running lean as per the wideband too

 

[hotcobra03]

https://www.google.com/url?sa=t&sou...FjAEegQIBhAB&usg=AOvVaw38Z-XalfWg8VveAl34f5W7

 

[01yellercobra]

Sounds good. What’s the best way to check vacuum leak on these cars? Can I hook up a vacuum gauge?

I still do the carb cleaner around the areas that might leak. But for it to come on suddenly and after a pull I'd say something popped up. If you still have the full PCV there's a line that goes under the back of the blower that could've popped off.

 

[Terminator Dave]

https://www.google.com/url?sa=t&sou...FjAEegQIBhAB&usg=AOvVaw38Z-XalfWg8VveAl34f5W7

Your link is no good.

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[Terminator Dave]

It just sounds very very loud at idle like there’s a exhaust leak. Setup is stock manifolds with bbk off road pipe and Borla stingers.

Is the engine idling fast? Another sign of a vacuum leak.

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[Johngreg]

Is the engine idling fast? Another sign of a vacuum leak.

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It’s a vacuum leak, the rpm go up and down at idle. Will use carb cleaner and update today

 

[hotcobra03]

Your link is no good.

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it's a pdf file..adobe Reader is needed.
I just tried again and it opened.

 

[hotcobra03]

these codes say.rear o2 sensors are backwards..

blue plug is drivers..purple is passanger..


check that..

reset pcm..

https://www.google.com/url?sa=t&sou...FjABegQIARAB&usg=AOvVaw0lOQfWiPHAlDlzrUW-LIRC

h2,has 2270/2272.
sends you to h3,

here has 2197..

look down list
.

crossed wires..this may be cause for all 3 codes

 

[Johngreg]

these codes say.rear o2 sensors are backwards..

blue plug is drivers..purple is passanger..


check that..

reset pcm..

https://www.google.com/url?sa=t&source=web&rct=j&url=http://www.svtperformance.com/forums/attachment.php?attachmentid=53804&d=1446433792&ved=2ahUKEwi27JeT2evcAhUH5awKHWsnDcMQFjABegQIARAB&usg=AOvVaw0lOQfWiPHAlDlzrUW-LIRC

h2,has 2270/2272.
sends you to h3,

here has 2197..

look down list
.

crossed wires..this may be cause for all 3 codes

I don’t have the rear o2s in anymore. One side I plugged off and other side I’m running a wideband. Front o2s are connected

 

[Johngreg]

Sprayed the vacuum lines down trying to find a leak. Did not find anything but smells like fuel from the driver side header area?