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Chevrolet Repair/Poorly Gas Efficiency

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Question
Hi Tom.

My name is Ernesto and I have a 1995 Chevrolet Blazer s-10 i have a problem with Gas consumption my engine is Vortec 4.3 V6 4WD also sometime the engine hesitates and then goes back to normal by itself but i do get black smoke to come out when i speed up or step on the pedal for the passing gear to engage also feels when I stop like the engine doesn't pick up power until I step on the gas a little bit more than usual....is there any guidance to correct this issue..

Thanks Ernesto.

Answer
GOOD MORNING ERNESTO,WELL THIS WILL BE HARD TO ANSWER BECAUSE IT COULD BE A FEW THINGS CAUSING THIS. IF YOU TOOK THIS TO A SHOP THEY COULD SCAN THIS AND GET LIVE DATA FROM THE COMPUTER TO SEE IF SOMTHING IS OUT OF SORTS,SUCH AS MASS AIR FLOW SENSOR OR MAP SENSOR, OR BAD OXYGEN SENSORS COULD CAN THIS AS WELL. THE ONLY WAY THE ENG KNOWS HOW MUCH FUEL TO BRING INTO THE SYSTEM IS READING THE O2 SENSORS. SO IF A SENSOR THINKS THE ENG IS RUNNING LEAN IT WILL TRY TO PUT MORE FUEL DOWN INTO IT. LAST IS A FAULTY COOLANT TEMP SENSOR,THE COOLANT TEMP SENSOR MAY THINK IT IS REAL COLD OUT WHICH WOULD WANT MORE FUEL,THIS WILL ALSO CAUSE BAD FUEL MIL. ONE LAST THOUGHT, A PLUGGED AIR FILTER WILL DO THIS FOR SURE,CK THIS FIRST.... SO YOU SEE THIS IS A HARD QUESTION TO ANSWER OVER THE NET..HAVE IT SCANNED AND I THINK THEY WILL COME UP WITH THE PROBLEM...GOOD LUCK AND IF YOU NEED MORE INFO LET ME KNOW,,,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

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MANY CUSTOMERS IN OUR BUSY SHOP.

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