1999 5.7 Vortec problem

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Seppl

TYF Newbie
Joined
Feb 14, 2025
Posts
3
Reaction score
0
Hi guys.
Got following problem with my 5.7 vortec.
Started fine, drove out of driveway and she started back firing and smoking really bad, no power.
The fuel tank was a quarter full, by the time I limped it back into yard, fuel tank was empty.
Oil dipstick is 4 to 5 inches overfull now.
So I'm guessing the fuel went into the cranking case.
I'm guessing Piston rings are gone, or is there someway else the fuel can get into the oil ?
 

OR VietVet

GMT800 SUV/Trucks
Supporting Member
Military
Joined
Oct 8, 2014
Posts
21,421
Reaction score
38,571
Location
Willamette Valley
Strange that numerous piston rings went bad at same time. Do a compression test but may be pretty bad with failed compression rings. Any recent fuel system or engine work?
 
OP
OP
S

Seppl

TYF Newbie
Joined
Feb 14, 2025
Posts
3
Reaction score
0
Only new cap ,rotor, sparkplugs and wires. Was going to change fuel pressure regulator and spider injectors.
Fuel pressure went right away to zero as soon as pump shut off.
 

Forum statistics

Threads
133,785
Posts
1,891,034
Members
99,089
Latest member
SinStar999

Latest posts

Top