to followup on my followup: i finally found the surging problem
there is a hard plastic tube that goes from the top of the (valve
cover?) to the throttle body underneath the thin plastic engine cover
on the right side. one end of this tube has a 2" rubber hose adapter
(with 2 different inside diameters!) that had a crack in it. this
evidently opened up when it got warm and closed when it slightly
flexed, letting additional air into the throttle body. since this is
after the MAF and IAC, it tricked the computer into increasing the gas
cave creek, az
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.