Blazer has been running fine, starting immediately without a hitch. I took a 500 mile trip, and the next day and since, it's very hesitant to start. Battery is fine, turning over without issues, seems like a fueling issue.

I took it by a place I trust, and they couldn't really get it to do anything while warm. It's really only when the engine is cold. If I cycle the ignition on a few times before trying to crank, it will start better. Guy at the shop said that the injector could be dumping the fuel or something like that. Once running, runs like it always does, mileage is normal.

Anyone had a leaky injector like this? I haven't looked into what's involved in replacing.

 

Start off with a fuel pressure and leakdown test. You can rent the gage from autozone, hook it up to the schrader valve on the fuel rail. You do the test with the key on, engine off. Your initial number should be between 60 and 65 and shouldn't go below 55 for 10 minutes. Post back your initial and 10 minute later numbers.