You are here:

Chevrolet Repair/fuel in oil

Advertisement


Question
Hello I have a 1998 5.7L C1500 Suburban. Immediately after starting fuel pours in engine filling  rear cylinders with fuel and it also goes in oil. Of course you get a what I call hydraulic lock, the starter will not turn over until fuel is expelled. Installed new spider with the engine. It is a rebuilt GM long block less than 700 miles. It does have some original sensors some have been replaced. Any suggestions what could cause this.I really need help.
Thanks,
Jimmy

Answer
HI JIMMY, SO YOU HAVE INSTALLED NEW FUEL INJ,S. NEXT STEP WILL BE TO REMOVE THE HARNESS TO THE INJ AND CRANK THE ENG OVER LIKE THIS. FUEL SHOULD STOP SPRAYING IN. IF NOT THE INJS ARE FAULTY.  WHICH IS A LONG SHOT..THE NEXT STEP IS TO CK THE WIRING HARNESS TO THE INJS AND MAKE SURE THE HARNESS ALL LOOKS GOOD, NO PINCHED WIRES [NEW ENGINE THIS IS POSSIBLE. THIS COULD BE SHORTING THE HARNESS OUT CAUSING FUEL TO SPRAY IN..THE NEXT COULD BE A FAULTY COOLANT TEMP SENSOR .THINKS THE ENG IS REAL COLD SENDING ALL KINDS OF FUEL TO THE INJ..LAST IS A FAULLTY PCM [COMPUTER] SENDING A SOLID SIGNAL TO THE INJ WITH NO PULSE,[THIS MEANS ON OFF ON OFF]SIGNAL TO THE INJS.. THE INJS SHOULD HAVE A PULSE..IF YOU CAN NOT SEE ANYTHING OBVIOUS I WOULD GET THIS TO A SHOP THAT HAS A SCAN TOOL AND HAVE THEM CK DATA. THIS WILL MAKE THINGS FASTER FOR YOU AND LESS GUESS WORK AS WELL...LET ME KNOW IF YOU NEED MORE INFO AND HOW YOU MAKE OUT..,,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.