crys36

Ok she's a 98 V6 with about 120K on her. The ABS light came on along with the Check Eng. light. The check Eng was for a misfire in #6 cylinder. I changed the front rotors and pads since they were basically gone and did'nt want to take any chances. The brake pedal feels spongey and slowly will go to the floor (almost). When U come to a stop not in all situations but some there is an unmistakeable grinding,screachy pulse about 3X before the car stops. Was there before and after the pads and rotors were replaced. Did'nt have time to look at the rear drums. Now before I take it to my local Mechanic who is very good but $$$$. Any ideas on what is happening. I'm thinking possible caliper,air in line, bad master (its definetely coming from the front).More or less everything else.Any and all help-ideas would be appreciated

xeroinfinity

you hav air in the lines most likly.
The pulsing and grinding is just the new pads and they probly are not geting enough brake pressure to operate correctly.

Your light came on because the pedal has triped the ABS light, mostlikly from the air in your system.

Goog Luck

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1999 Grand Am SS 3.4 OHV

xeroinfinity

your mech will hav to clear the code to get the light out

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1999 Grand Am SS 3.4 OHV

crys36

The 3 pulse stop with break creaking was there before I put the new pads and rotors on. At first they seemed great but after a few miles and stops the noise came back. With that much mush in the pedal I did suspect air but did'nt have the time to bleed them but will do it anyway. Had all the codes cleared at autozone but they came back within 30 miles. On the #6 cylinder I chnaged the plug(s) and wires. the engine ran much smoother but the code came back. Could or should I change the coil pack for those 2 cylinders ? Since there are 3. 1 set for every 2 cylinders.It also lists 1 possible cause as the injector. The plugs on # 6 have been changed twice and each time they look just fine.Clean burn-no deposits-nice color. I got a busted up knee so doing things right now is a little uncomfortable. Thanks to all on this board since u guys have saved me money and time--many times---Chris

xeroinfinity

Ok the pulse is the ABS, wheather the calpiers are bad or not , i'm not sure. They should be looked at by someone qualified in diagnosing brake/ABS trouble.

As long as thiers air in the lines, the light will probly keep coming on till thats fixed.

Did you replace any of the clips or sliders ?
Did you grease the pins and slide areas?

The misfire is most likly an injector, not the plugs.
It could be dirty, but very well could be going bad.

A good shop can clean your injection system, and or injectors. Sometimes it works , but most of the time,
I just replace the one(s) that are acting up(not working proper)

So I wouldnt waste money on new parts unless you know for a fact its bad. Unless you just hav stacks of cash to throw around The coils can be tested too.

Hope that clearifies things

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1999 Grand Am SS 3.4 OHV