Hey guys, I just got my 96 ls 4dr 4wd on the road. I has 107k on it. I love this truck. I really love everything about it. I am having a problem though. When the truck is moving, it runs like a dream. When I stop at a light or if the truck is in park, it shakes like it is idling too low. The truck never shut off or felt like it was going to shut off. I have been reading some other post about the fuel pressure regulator and nut kit. All of the symptoms they describe fit my problem to a tee. I even looked up the parts. The funny thing is all of the web sites say the parts are from 88-95 blazers. Is there a kit for 96? If so, where could I get it from? I haven't tried the cleaning proceedures (fuel injector cleaner, dry gas, egr cleaning...etc.) Should I try the quick fixes first or should I just go ahead and replace the regulator and lines? Please help, I am not use to a shaking car (truck lol). I can live with it if I have to because I love my Blazer. It is my favorite car (truck). It is my first truck, I have had 15 cars and the Blazer is the best. I never even looked at one before this one fell in my lap. A coworker bought a Subarru and didn't want to trade it in. He gave it to me for 2k. Please help me get my baby straight.

 

Sounds like either a bad fuel pressure regulator or even a vaccume leak...but a leaking fpr would also cause an extended crank and hard start

 

Where would I look for the vac leaks? I am not a noob to cars but this is my first blazer and I am use to sideways engines. Now that I think about it, it probably is a vac leak because when I switch the hvac controls, it takes like 2-3 seconds to switch from one setting to the other.