T5 Expert Operator
Join Date: Apr 2001
Location: 3Fb Skunk Works(JXR01 Dev)
Re: AU1 XR6 Rough under acceleration
I would say it's one of the basic things related to the spark of the engine as really theres not much that can go wrong in the AU's.
At 80k i would change the plugs and see if it does the trick. If not heres a way to determine if the leads are the problem.
Start the car and rev the engine via the throttle body listen for the hessitation and/or miss. Next, pull each spark plug lead one by one and listen if the engine changes beat, if it does then you know one of the leads is shot.
In this case it's best to change all 6 iginition leads.
Next if the problem still exists then it could be the ignition coil (this happened to one of the work Fairmonts). Under acceleration it would jerk (like spark, no spark, spark) all the way through the rev range. Another tell tale sign of coil problem is to watch your tacho under acceleration. If the needle is jerky then i would say it's 90% the coil is at fault.
Hope this helps.
Motor May 2001 Quote: "Believe it or not, there are actually a bunch of weirdos out there who reckon a six cylinder is the dux gutz. Bugger it: I'm one of them" :s5
AUII Late Ed XR6 HP T5 Venom- Full Tickford Body Kit, 17in Wheels, Herrod Bi-plane Spoiler, Momo Steer/Gear, T-Series Interior Options, Premium Stereo and a very light-tuned 4.0L I6
(FPV-Tickford Club of NSW Member and Co-Founding Member of 3FB Inc, Ford Forums Food Bandits)
Last edited by XR_Strider_GuY; 01-01-04 at 10:50 PM.