1. i have a problem with my car it’s a LNF 2.0 turbo obviously.
   It was standing for a while then my engine light came on after first start with the first codes I attached (*1)so I change spark plugs. Then it ran great and after a few days and a longer drive the second ones came (*2) and I was reading maf or map could be the problem. So I change them and now it’s high idling. Can anyone help me please.
   
   *1 P0300/P0303/P0302/P0304
   
   *2 P2187/P0304
   

 

Welcome to the site

*1 are misfire codes, the new spark plugs could have fixed that, what plugs did you install?

*2 P2187 indicates several things like in here

https://www.obd-codes.com/p2187

 

thank you!

i did the Iridium Spark Plugs from ACDelco. The best! but with this I’m done with the stuff I know currently. So thank for welcoming me !

as I said I change maf and map sensors as well. But it ran high ravs at idle.

as I checked my fuel cap seems to be some old china cap from the owner before me. Maybe that’s the thing

 

misfire on all cylinders, fuel trimming lean at idle. That means a leak in the turbo piping, to me. Maybe, check the wires to the MAF.
Did you install the correct MAP for your car? If it has a tune it takes a different one. GM Stage One is a tune.

 

hey man, the Map and maf are ac delcos so they should be the right ones. The cable looks ok or good so far no wires are cut or anything.

i Don’t think it has any tunes to it

haven’t noticed any whistles more than there should be but when I’m back I have to check for leak probably. In my other answer I said I saw my fuel cap is some Chinese crap.

thank you!!

 

Fuel cap has nothing to do with the codes cited.
Is there a sticker near the fuel fill stating "97 Octane REQUIRED"?
Lots of parts books claim "fits all" when it comes to HHR. They don't admit the SS exists.

P2187 means there is not enough fuel in A/F mixture (causing misfires on all cylinders). Could be a fuel pump or the high pressure fuel pump, pressure test in order.

 

oh ok so not air/ so it’s not enough fuel ok. Then I have to test the pressure when I’m back home.

thank you !!

 

An excerpt from the OBD website link


Potential Causes of P2187 DTC Faulty O2 sensor (front)
Faulty gas cap seal Leaky or loose oil filler cap
Air leaking into the intake manifold downstream from the Mass Airflow sensor due to the manifold itself
vacuum hoses off or cracked, leak MAP sensor,
Leak at turbo bypass or it's stuck open,
power brake booster hose, or a leak in the EVAP system hoses. Faulty MAP sensor EVAP canister purge valve
Fuel injector leak
Fuel pressure regulator faulty Leaks in the exhaust system Faulty variable camshaft timing Faulty ECM (engine management computer)
Faulty O2 preheater (front) Clogged fuel filter
Fuel pump wearing out and producing low pressure.
Faulty mass air flow sensor

Read more at: https://www.obd-codes.com/p2187
Copyright OBD-Codes.com

Check the oil fill cap also

 

alright thank you. Sounds like I’m not gonna drive it this year again. Lot of stuff to check and lots of money to spend. I have already put in a lot for me. But thank you!!! Really appreciate it

 

P2187 for an HHR has nothing to do with gas cap, that would trigger EVAP codes. Generic code descriptions are OK, if you take them with a grain of salt.
It means that the A/F ratio is wrong; too much gas or too little air. The computer can only control the amount of fuel. In this case the computer is lowering the amount of gas in the mixture because it is sensing there is too much.
The MOST likely cause is one of the fuel pumps. Second is a sensor, but they should cause their own codes.

Are there any codes NOW, or just odd behavior? If not then probably wrong MAP.