Engine swap cranks but doesn't start
#1
Engine swap cranks but doesn't start
I have a 2002 blazer 4.3l 4x4 that was my son's. He drove it hot and blew a head gasket. I purchased a 4.3l out of a 2000 s10 2wd. Everything went as expected until it was time to fire it up. It cranks but doesn't start. No engine codes. Will run if you pour gas in the throttle body. Has fuel to the valve stem at the throttle body. Any ideas?
#2
Is there any chance that the gas is bad or old?
These engines are particular about fuel pressure. You should test pressure and leak down per the sticky.
Since it fires up with gas down the throttle body lets assume for now that spark is good. That leaves fuel injectors. We can test for injector pulses at the harness if we get this far.
George
These engines are particular about fuel pressure. You should test pressure and leak down per the sticky.
Since it fires up with gas down the throttle body lets assume for now that spark is good. That leaves fuel injectors. We can test for injector pulses at the harness if we get this far.
George
#6
That why your truck wont start. Now you have to find out if its the injectors/regulator or the fuel pump so move down to the fuel filter fitting and test there. If that fails then its either the fuel pump or its wiring/power. If it passes then its the injectors or regulator.
Fittings in post #43:
https://blazerforum.com/forum/2nd-ge...eakdown-88305/
George
Fittings in post #43:
https://blazerforum.com/forum/2nd-ge...eakdown-88305/
George