[91Caprice9c1]

Originally Posted by ammcf1

I haven't checked the codes yet, but I did notice that it is doing the same "hiccup" thing very slightly when it is in idle. I also notice a periodic "click" that corresponds with each time it hiccups. The click sound seems to be coming from somewhere behind and below the air cleaner - I can't isolate it very well. Does that give any ideas?

http://www.troublecodes.net/GMimport/
This will give you relevant codes. I forgot to mention that each code will repeat itself three times before going onto the next code.

http://www.automotiveforums.com/vbul...d.php?t=756903
See this thread about checking fuel pressure.

Behind and below the air cleaner is interesting. That is precisely where all the sensor grounds are located - a bad connection here will definitely cause performance ailments. I dont know if there is enough power to cause an arc large enough to produce an audible click, but its worth checking out. Remove your air cleaner and housing. It will take some looking/feeling but eventually you will find a bundle of wires bolted to the back of the intake manifold with a 10mm (hex-head) bolt. These are your senor grounds. Take this bolt out, be sure the connection is clean and tight so that we can rule this out.

You will need a timing light to check the timing, and a paper clip you dont mind bending out of shape. Unfortunately to check to see if the belt was installed correctly you have to take a bunch of stuff off, but if your ignition timing is spot on, it may be safe to assume the belt was installed correctly.

-MechanicMatt