You are here:

Chevrolet Repair/hesitstion on acceleration when warm

Advertisement


Question
When my 1994 chevy s10 blazer with a 4.3 vortec engine starts it runs fine. When i drive a few miles it starts hesitating on aceleration. It is't displaying any code. When its cold its fine.

Answer
HI KEVIN,,WELL THE FIRST THING I WOULD DO IS GET THE FUEL PRESSURE CHECKED..YOU WANT ABOUT 40 TO 50 LBS WHEN RUNNING. IF LOWER THEN THESE SPECS,PLUGGED FUEL FILTER OR BAD FUEL PUMP..IF ALL THIS LOOKS OK POSSIBLE BAD MAP OR MASS AIR FLOW SENSOR...HAVE YOU CHECKED THE AIR FILTER ON THIS LATELY ??? A PLUGGED FILTER CAN CAUSE THIS AS WELL..IF ALL OF THIS LOOKS OK THEN MY NEXT CHOICE WOULD BE TO GET THIS TRUCK ON A SCAN TOOL AND RUN A DATA TEST ON ALL OF THE SENSORS.NOT A CODE CK BUT DATA SCAN...INCLUDING OXYGEN SENSORS...LET ME KNOW HOW THIS GOES AND GOOD LUCK TO YOU,,,TOM....

Chevrolet Repair

All Answers


Answers by Expert:


Ask Experts

Volunteer


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.

©2016 About.com. All rights reserved.