Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - rez

When braking in my mk2 mondeo I can feel a knocking through the brake pedal. I am reasonably mechanically minded and have checked this on the net including this site and basically I have eliminated most common causes..

1) Both drive shafts have been replaced with new ones (the n/s driveshaft had a knackered cv joint)

2) Both bottom arms have been replaced with new (o/s balljoint had slight play)

3) New discs & pads been fitted

I have even tried swapping both front hubs from one of my mates who runs a scrappy to eliminate wheel bearing problems and they seem fine.

After doing the above work I've gotta admit the knocking isnt as bad but still noticable.. When I tried braking heavy I didnt notice it.. it seems to be only when braking normally-gently and only at low speed just before stopping..

Iv searched this thousands of times and apart from the obvious cv joint/ball joint/bushes/brake symptoms that iv now eradicated the only other things iv found it could be is the subframe mount bushes but iv checked them and they seem to be fine.. I also noticed someone saying the abs system may need pressure flushing.. the only other thing I have noticed is thier is slight play on the o/s droplink (fitting them next week) but surely that wouldnt cause it..

Is thier anything else anyone can think of or would you agree with flushing the abs system??

Thanks in advance

Edited by rez on 10/08/2011 at 19:24

Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - Collos25

Worn steering rack or suspension tops worn

Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - bathtub tom

Brake discs with a high spot?

Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - rez

Thanks for your reponse..

@Collos25 - Thiers no play on the rack and no movement/knocking through the steering wheel & when I borrowed the hubs off my m8 they were actually complete struts (so I didnt have to strip em down for the hub) but it still had exactly the same problem

@bathtub tom - Wouldnt be that m8 as the problems the same as it was with the original old discs & pads


I did post elsewhere and some people are saying droplinks & maybe anti-roll bar bushes.. Think ill replace the bushes at the same time i sort the droplinks just to make sure

Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - rez

UPDATE:

Droplinks and front & rear anti roll bar bushes replaced but still symptoms persist.. WTF!!!

Im starting to think milk bottle, rag and some petrol atm..

any more ideas people??

Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - Peter D

Whar rate is this knocking, once twice per wheel revolution or more. You could go to an mot station and get them to run it on the brake testing rollers to see if you could isolate it. Be prepared to pull the ABS fuse incase that is you problem. Regards Peter

Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - Peter D

What not Whar. You have not mention the rear brakes causing the problem, another good reason to use an MOT station brake tested rollers to isolate fornt form rear. Regards Peter

Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - Ethan Edwards

I had a Mondeo, with nice Ford OEM wheels. Given the state of the UK roads...they buckle...really easily. Check yours are still round. Why not get them balanced at the same time.

Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - rez

At last!!

Thanks for the replys eveyone especially Peter :D

I pulled the abs fuse to check it and the problems sorted.. gonna grab a new sensor next ;)

Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - Peter D

Jack each wheel up and spin it and inspect very carefully, a bulge or tread deformity can cause the ABS to kick in. If they are all OK then get a code read as it may help you identify which sensor is at fault. Looking at the live data will tell you which sensor has the low output. Regards Peter

Ford Mondeo MK2 - Mondeo MK2 can feel knocking through brake pedal - rez

Now sussed it was the o/s/f.. now dealt with after having to drill the old one out (been tried before obviously as rounded to hell)

Thanks again peter :)