Sierra3
Registered
Had a new booster replaced at dealership thinking that was the issue. Brakes function properly with plenty of assist under normal above 10MPH driving on and off. But it looses asist when holding brakes for a long time in bumper to bumper traffic at idle in drive. It's similar to tractor trailer brakes when you keep pumping the brakes and air pressure goes down on the gauge. The pedal gets really hard to push with no power assist at all. Its a sobering experience when comming up on a car ahead of you and you have to leg press the brake pedal when you expect it to be alot eaiser.
What im looking for if anyone can take a pic of the Mark VIII set up particularly the directinal valve and vacum hose routing. Im suspecting i have it hooked up wrong or a leak in my vacuum canister, and at idle not producing enough vacuum to compensate for the leak? Suggestions or things i should look for?
It only happens when im at very low parking lot speeds and engine is in drive and basicly idleing in trafic or stopped traffic. Then the next time you apply brakes you get a surprise of no assist.
I have the 2001 SVT motor in there but tried to keep everything else factory Mark 8. Only emmisions that are missing is EGR which is blocked off with plate. Did the Cobra have a bigger vacuum canister because of the larger cams? Or should i go with a new aftermarket canister from like summit racing or jegs?
What im looking for if anyone can take a pic of the Mark VIII set up particularly the directinal valve and vacum hose routing. Im suspecting i have it hooked up wrong or a leak in my vacuum canister, and at idle not producing enough vacuum to compensate for the leak? Suggestions or things i should look for?
It only happens when im at very low parking lot speeds and engine is in drive and basicly idleing in trafic or stopped traffic. Then the next time you apply brakes you get a surprise of no assist.
I have the 2001 SVT motor in there but tried to keep everything else factory Mark 8. Only emmisions that are missing is EGR which is blocked off with plate. Did the Cobra have a bigger vacuum canister because of the larger cams? Or should i go with a new aftermarket canister from like summit racing or jegs?