So I've been trying to pinpoint a hard starting and not starting when hot problem that I thought was in the distributor. Well I changed the plugs and the number 1 plug was as white as a brand new one. The rest were black as coal. The car has a steady miss at idle and riding the car it just doesn't really have any power. I"ve only had it 3 or 4 days and it ran alot better the 1st day. What do you guys think?

 

ohm your injectors with a multimeter. Set your meter to 2k and key on engine off. Look for 0.015 ohms or so and they should all be pretty close to each other. If you have one that is like 0.010 or lower for example, then it is bad.

 

I actually changed them last night. I put in a set from a 2002 LS1 and it was the problem. The car runs better than ever now. Thanks

 

I think I have the same problem. does your car have a hard time starting and did it idle really rough? Mine ran great the first day I had it, but since, ive had these problems. It runs fine when I get to about 5 mph, but is rough when it idles.

 

My car would go up and down at idle from 500 to 700 ish. It didn't have any power once I got moving but it was a smooth miss if that makes since. It ran consistently just no power at all. It would crank forever when it was hot. It ran good the first 5 seconds of running but just keeping getting worse. My fuel pump actually gave up today. It had a electronic whine from inside the cabin that I wondered about but it looks like I figured out what it was lol. I held my car up to around 2500 rpm and unplugged each injector. A few wouldn't change the engine at all and some was very noticeable. The number 1 however must not have been doing anything it was white as snow.