Help with problem

[azza11]

Hey guys need to run this past someone with some knowledge.
I have a AU series 1 update wagon, 4.0 at idle or low speed when you turn the wheel the power and revs drop, about 100-150 revs, doing the power windows does the same but not to same extent but it is noticable. I had a battery test done and it was only doing 200cca, the battery was a 450cca century. I brought a new battery a gold supercharge, its 550cca. Problem is still apparent, also cars not behaving well at low speeds. I thought maybe plugs, i always run platinums and replaced these with new iridium ngk platinums, little improvement. Theres no cutting or missing, its not doing anything exhaust wise to suggest a miss. My other problem (comes in 3's doesnt it) is front brakes. The pedal has small amount of travel (short pedal) and doesnt clamp hard when applied. Then it suddenly clamps. I have new DBA rotors and Bendix premiums. I was thinking maybe these issues are related, maybe its a vacuum issue. What do you think.
Thanks
AZZA

[The Monty]

I think they all do it. Run a three inch mandrel intake with a pod, and just tap the wheel at idle, and it half sounds like you have a blow off valve.

[azza11]

Thanks Monty, im sure its always been there the low speed power steer idle drop. It was more pronounced last week when the battery was only cranking 200cca. I should also mention with the brakes, i havent replaced them with with the new dba's and bendix pads.

AZZA