I got a 2001 blazer with the 4.3 Vortec. It’s got 104,000 miles, with a hard start condition. I think the fuel system has been replaced one time before I bought it at 103k miles.


When I start my car first thing in the morning, the car cranks for less than one second before it starts up. I turn the key, and it starts right up, almost too quickly.

When the car sits for a couple minutes before starting it again, it cranks less than 1 second before it start.

But when the car sits for a couple hours during the day at a parking lot and I try to start it, it cranks for 3-4 seconds and then starts.

She always starts up, but what could be causing this? I’m guessing it might be the fuel pressure regulator or the spider injectors, but I don’t have a clue because there’s no engine light or any codes.

Theres no drivability issues or any misfires.



4.3 experts, please help me find out what could be causing this.

 

Start with fuel pressure and leak down when the condition exists.

George

 

ShoFto, did you get to the bottom of it? My 98 blazer is doing the same thing as yours, exactly as you describe.

 

If you would like help diagnosing your truck, start a new thread with the details and we can start diagnosis.

George