earlybuz

I have a 2000 xj classic, 128,000 miles , all stock. It requires me to blip the throttle on start up. When it's idling there is a whistling sound that I cannot locate. I've changed the TPS and cleaned the IAC valve. While cleaning the IAC, I had to disconnect the vacuum hose at the manifold. Started up like brand new, although idle was a little high. A day later I realized I forgot to hook the vacuum line back. While running, I reconnected the line and the engine dies! So, no improvement other than Advance Auto's bottom line.

Please help!

xj_maniac_newb

Id say the whistling is from the little air restricting thingy most people take out of the air box tube. Pretty common thing to do lol