in the low rpm the engine pulls like crazy, but after about 5k it feels like there's nothing there. If i back out of the throttle a tad it seems to pick up a little better past 5k. Wondering whats the deal... I have a header, high flow cat, diy cai, and 2 baffle exhuast (basically the closest you can get to a straight pipe exhuast legally). i think it's air/fuel mixure issues, or i should spring for a set of cams. Also i proudly have 275k on the engine and transmission, also i think the differential may be ready to fly apart... I have work to do aparently but i dont know where to start.
Thanks
Garrett

 

When was the last time you did a tuneup? Spark plugs, wires, PCV valve and so on...

 

oil change is coming up soon. Plug wires are about a year old (30000-50000km) they are accel plug wires. Standard plug wires (gapped right and all) those are about 10000kmish, and the pcv valve hasnt been done, and i don't really know what that is?

 

Positive crankcase ventilation valve. Its about a $5 part. It would be attached to the hose that runs from the top of the valve cover down air intake. If it is bad or clogged, it can cause wired issues.

 

Looking into this now. Thanks das' you and spud have never failed me yet lol. Ill get back to you.