Hi guys,


I have a 2008 g37s coupe 6MT, recently, the engine started choking at acceleration, above 2000RPM, as if it wasn't getting enough gas or air, I thought the problem was dirty throttle bodies, I just cleaned them, but didn't help. I think it is the mass airflow sensors maybe, can someone help me please? I'm going crazy...

 

SOmething alse, I can't drive above 2000rpm, I have to drive at less than that... whenever reaches above that level, engine starts choking, I have to press on the clutch

 

Sounds like you're in limp mode. Are you getting any CEL codes?

 

I don't get any code

 

but my service engine soon light came on

 

OK the fact that the CEL is on means it's throwing a code. You need to read what code it is and find the cause.

 

How do I find out what code it is?

 

If you are near me in west palm beach I can read the code for free for you. Otherwise, you need to connect an adapter to your OBDII and pull the code with a scan tool. Any mechanic should be able to read the codes for you too, some won't charge just to read the codes, some will.

 

Unfortunately, I am very far, I'm in Canada, but thanks. Last week my serpentine belt started screaming, it needs a change, do you think there is a connection between that and what is happening now?

 

I cannot say for certain but it very possibly could be. I would start there, while they change your belt they will probably read the code for free.

 

My mom's care had a throttle body stuck open and it did the same thing.

 

I cleaned the throttle bodies after the problem surfaced, they looked normal to me

 

I just tried again, now the car doesn't even start

 

Might be too late now, but often auto parts stores have code readers.

BTW, if your belt is "screaming" it's not usually a belt issue - it's an issue with one of items connected to the belt. This could be something like your alternator seizing, which means your battery isn't charging, which would lead to odd behavior in the car, and eventually a dead battery.

(FWIW, I had a similar situation in another car with the throttle not going above 2000 rpm and it ended up being the throttle position sensor in the throttle body)

The above is just speculation but at this point it sounds like you'll need a tow anyway.

 

Two days ago, engine was harder to start, now doesn't even start, it tries but it is like no fuel in tank, at this point I think it is the fuel pump, anyways, I have to tow it to the dealer now as you said.