2000 Blazer LS RWD

Been having this issue every now and then when I was running the AC my engine would lose power if I was in a lot of stop and go. But recently I just have it happening all the time. In idle I can hear a misfire. When I put it in reverse or drive it pulls itself without any help and won't lose speed when I let off the pedal at 40mph.

It's misfires can be violent when I take it to 3000 rpm and causes what feels like bucking. I've parked it for now but from what I've been reading it sounds like my Fuel injection spider is leaking.

I've replaced some parts on the vehicle that were worn or damaged. TPS sensor, power brake valve. I even dropped the pan on the trans to check if there was any heavy wear and the pan was pretty clean.

 

Open the throttle body blade or even better remove the throttle body and look inside the plenum. It should be carbon black, any shiny/gold colored areas indicate a spider leak. Hopefully thats all it is. easy half day job

 

Yep Can see it looking through the blade.


I bet it's much worse farther back.