2004 CT CEL Diagnostic Help

[dyazdani]

I recently had a CEL pop up with the following:

P2187: System Too Lean, Bank 1

P2187: System Too Lean, Bank 2

P0507: Idle Air Control RPM Higher Than Expected

P0302: Cylinder 2 Misfire Detected

 

Symptoms while driving:

Rough idle

Rough Acceleration

"Cruising" (i.e. no acceleration) is normal

Fuel consumption is poor (relative to the norm)

 

I just had a number of items worked on including air filter, cabin filter replacements, and spark plug replacements.

 

For both banks and idle codes, I'm thinking there could be a leak in the intake somewhere.  I doubt both MAF's could be the issue.  Also not ruling out the need for new coil packs, as I can't say that mine have been replaced.

 

Any help or ideas would be appreciated.

[JFP in PA]

It sounds like you definitely have and intake air leak that is affecting both banks.

[lewisweller]

On 01/12/2017 at 5:17 PM, dyazdani said:

I recently had a CEL pop up with the following:

P2187: System Too Lean, Bank 1

P2187: System Too Lean, Bank 2

P0507: Idle Air Control RPM Higher Than Expected

P0302: Cylinder 2 Misfire Detected

 

Symptoms while driving:

Rough idle

Rough Acceleration

"Cruising" (i.e. no acceleration) is normal

Fuel consumption is poor (relative to the norm)

 

I just had a number of items worked on including air filter, cabin filter replacements, and spark plug replacements.

 

For both banks and idle codes, I'm thinking there could be a leak in the intake somewhere.  I doubt both MAF's could be the issue.  Also not ruling out the need for new coil packs, as I can't say that mine have been replaced.

 

Any help or ideas would be appreciated.

Intake air leak for sure. 

Check the Y pipe and it's fitting underneath pipe 4, check the connecting pipes jubilee clamps are tight, check the smaller pipes connected to the throttle assembly are all connect properly.  The pipes are prone to splitting also.

Check 25, 14, 13, 5, 4 oring 9 can leak but don't make sense that it would assuming they didn't remove it, check 24 directly under the throttle assembly is not rubbing against your water pump pulley. 

 

If your still stuck smoke test your intake. Search my posts about that. Simple home made smoker.