I have a 1988 Iroc z 5.7 and am having a problem. Like to get some thoughts on it. In the cold, fuel leaks from around the o-rings on the injectors. I replaced them with new GM o-rings and the next cold morning, it still leaked, enough to form a puddle on the manifold. I was thinking fuel rail or maybe fuel pressure regulater. Wondering if anyone knows about anything like this

 

If you know fo a fact the leak is from the injector "O" rings, then you may have the wrong size.

Someone else posted on a problem like this not too long ago and mention was made about the different size "O" rings.

I always use lube when installing "O" rings to prevent damaging or twisting/rolling them. I push and jiggle at the same time. I take my time and install them slowly.

Jake