2000 4.3gl won't start after overheating

[Coach mike]

Just replaced the impella and thermostat to my 2000 4.3gl after it over heated on Memorial Day. I cleaned out all hoses and removed all debri and old impella. Now it won't start. It turns over nicely but will not fire. I did find the audible alarm broken but I think that has been broke for a while. Any suggestions?

 

[Don S]

Re: 2000 4.3gl won't start after overheating

Do you have spark?

 

[Coach mike]

Re: 2000 4.3gl won't start after overheating

Yes I have spark. Should I be able to hear the fuel pump?

 

[Coach mike]

Re: 2000 4.3gl won't start after overheating

Ok, I just got it to fire with starter fluid in carb! Now, how to test fuel pump? Or relay?

 

[rickdasher]

Re: 2000 4.3gl won't start after overheating

Did you check the 6 amp circuit breaker by the fuel pump and the 50 amp circuit breaker on the front of the starboard exhaust riser? If they are still set, check for voltage at the fuel pump plug while the engine is cranking. If you have voltage, bad fuel pump. No voltage, bad fuel pump relay or open diode.