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Chevrolet Repair/Car dies going up hill..!

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Question
I have a 2008 chevy malibu LTZ with a 2.4 4 cyl engine. It drives fine on flat surfaces but any incline and it bogs down almost immediately. In some instances it has reduced power and gives me a "engine power reduced" message. Ive had the codes read multiple times with them saying "multiple/random misfires". We've changed the spark plugs, upstream O2 sensor, mass air flow sensor, throttle body/throttle position sensor, air filter and added injector cleaner to the gas multiple times. Nothing has fixed it. What else could it be? I need your help! Thanks.

Answer
HI CHRISS,IF YOU HAVE HAD MULTIPLE ENG MISFIRE CODES AND RANDOM MISFIRE CODES I WOULD BE LOOKING INTO THE COILS. THIS HAPPENS GOING UP A HILL BECAUSE THERE IS A BIGGER LOAD ON THE ENGINE...A REPAIR SHOP WITH A GOOD SCAN TOOL SHOULD BE ABLE TO LOOK AT THE LIVE DATE,NOT CODES. [FREEZE FRAME AND CK FOR IGN SKIP]IF THEY SEE THAT IT IS A IGNITION FAILURE I WOULD FOR SURE BE LOOKING INTO THE COILS.. IT MAY WORSEN IF IT IS DAMP OUT AS WELL. LET ME KNOW HOW THIS GOES..GOOD LUCK TOM...

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TOM SHEETS

Expertise

PLEASE READ ALL OF THIS BEFORE ASKING ANY QUESTIONS. IF THIS CHEVY SECTION IS MAXED OUT.YOU CAN REACH ME IN THE OLDS/BUICK SECTION. Will answer questions from 6:00am to 10:00pm all days [EST][[[ NO DIESEL OR PAINT QUESTIONS]]] will answer all 1965 to present QUESTIONS ON ALL GM'S on mechanics of these cars. Keep in mind i am not there in person i am going on what you are telling me !! PLEASE IF ASKING A QUESTION GIVE ME AS MUCH INFO AS POSSIBLE. THE MORE THE BETTER. SUCH AS YEAR,MAKE,MODEL,ENGINE SIZE. THIS WILL HELP ME HELP YOU. I will not be able to answer all questions because of some situations that i would really need to be there and see things for myself,such as electrical issues. In many cases i would need wiring diagrams. I can also give you an estimate on what the cost would be at our repair shop as an idea to help you. Keep in mind that my answer is ONLY MY ADVICE,ck with your mechanic as well.. >> THANK YOU, TOM..

Experience

I have been a ASE certified master mechanic for over 30 years and certified IN ALL 8 CATEGORIES,[engine repair,engine performance,auto trans,manual trans,clutches,steering and suspension,brakes,electrical systems,heating and air/cond. I am also a state CERTIFIED inspector for over 30 years. I do computer work [pcm]fault codes,pcm flashing,state inspection monitor readiness,repairs on exhaust,fuel service,[injection and carburetor,] charging system problems, running issues,alignments,frame problems,tire balance,struts and of course standard and anti-lock brakes.

Organizations
nys state auto repair industry and ase group.

Publications
N/A

Education/Credentials
high school,4 years of tech school,and many many hours of auto training with many gm classes and aftermarket training classes..

Awards and Honors
ASE MASTER TECH CERTIFIED IN ALL 8 CATEGORIES.NYS INSP LICENSE AND A/C CERTIFIED

Past/Present Clients
MANY CUSTOMERS IN OUR BUSY SHOP.

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