Ghibli rough idle and stalling

Teeter80

New Member
Messages
3
I have a 2014 Ghibli with just under 55,000 miles. It has a rough idle, intermittently stalls when coming to a stop and stumbles when accelerating from a stop. No check engine light, but does have a pending code P3053-00 (Intake Manifold Pressure Sensor 1 Out Of Range Low). No obvious vacuum leaks found. Did find both turbo wastegate levers worn, right hand side worse than the left hand side. Could the worn wastegates be causing the aforementioned issues? Thanks!!
 

CatmanV2

Member
Messages
51,409
I have a 2014 Ghibli with just under 55,000 miles. It has a rough idle, intermittently stalls when coming to a stop and stumbles when accelerating from a stop. No check engine light, but does have a pending code P3053-00 (Intake Manifold Pressure Sensor 1 Out Of Range Low). No obvious vacuum leaks found. Did find both turbo wastegate levers worn, right hand side worse than the left hand side. Could the worn wastegates be causing the aforementioned issues? Thanks!!

I'm afraid that sounds absolutely what mine was like :( Where are you? Would it help if I had a look and sucked my teeth at it?

No, in all seriousness, more than happy to compare it to mine, but it really does sound like it

C
 

Teeter80

New Member
Messages
3
I'm afraid that sounds absolutely what mine was like :( Where are you? Would it help if I had a look and sucked my teeth at it?

No, in all seriousness, more than happy to compare it to mine, but it really does sound like it
@CatmanV2 did you ever figure out what was wrong with yours? I have started digging into it a bit more. Found MAF values between the banks are vastly different throughout the RPM range. I removed both MAF sensors and found a good amount of oil in the right hand intake tube and MAF sensor. Cleaned both MAF sensors and swapped them side to side to see if MAF values changed sides, found MAF values stayed the same. Also found the engine idles and revs almost perfectly with both MAF sensors unplugged. Going to smoke the intake to make sure there are no leaks.
 

CatmanV2

Member
Messages
51,409
@CatmanV2 did you ever figure out what was wrong with yours? I have started digging into it a bit more. Found MAF values between the banks are vastly different throughout the RPM range. I removed both MAF sensors and found a good amount of oil in the right hand intake tube and MAF sensor. Cleaned both MAF sensors and swapped them side to side to see if MAF values changed sides, found MAF values stayed the same. Also found the engine idles and revs almost perfectly with both MAF sensors unplugged. Going to smoke the intake to make sure there are no leaks.

Yes, it was the wastegate on my bank 1 turbo. We swapped it and it's a totally different beast. The other thing you can try is unplugging the boost control valve on top of the engine.

It took me best part of a year to get to the bottom of it (I also have the MAF imbalance, but I *still* have the MAF imbalance with a perfectly running beast of an engine, so possibly a red herring)

Whole story:

C
 

Teeter80

New Member
Messages
3
Pretty confident the issue is being caused by loose waste gates. The car idles perfectly and doesn’t stumble/hesitate with the waste gate solenoid disconnected, it’s just way down on power. Also found the MAF readings are more balanced with the solenoid disconnected. Not sure what the future holds, looks like the “Trade In” light might be on!!
 

CatmanV2

Member
Messages
51,409
Pretty confident the issue is being caused by loose waste gates. The car idles perfectly and doesn’t stumble/hesitate with the waste gate solenoid disconnected, it’s just way down on power. Also found the MAF readings are more balanced with the solenoid disconnected. Not sure what the future holds, looks like the “Trade In” light might be on!!

Sounds exactly like mine

C
 

conaero

Forum Owner
Messages
35,458
Pretty confident the issue is being caused by loose waste gates. The car idles perfectly and doesn’t stumble/hesitate with the waste gate solenoid disconnected, it’s just way down on power. Also found the MAF readings are more balanced with the solenoid disconnected. Not sure what the future holds, looks like the “Trade In” light might be on!!
If the watergate is not sealing you are losing boost. If it were me I would remove both turbos and have them rebuilt, if one’s gone……
 

CatmanV2

Member
Messages
51,409
If the watergate is not sealing you are losing boost. If it were me I would remove both turbos and have them rebuilt, if one’s gone……

Yes, if there is significant play on both sides.

Apparently the bank 1 fails for more often than bank 2 (according to Jason). Go figure

C