randy 77zt Posted August 22, 2003 Share Posted August 22, 2003 not in a z but some food for thought.i work as a ford dealer tech.i work in front end and brakes-but everything is computorized anymore.i am the guy that gets stuck with other tech's comebacks or problems not solved.so we have this guy with a 2003 cobra that is not our favorite customer.buys a new car and then has some shop in los angeles modify it.any way after 8000+ miles the abs warning light comes on.first tech diagnoses it as faulty rear wheel speed sensors.second tech installs them because 1st tech is off.abs light still on.so i get the car.pull out the service manual and do official ford test.evrything checks out ok as far as harness resistance,voltages,etc.so i order a ecm for abs .install it .same thing over again.with the ford scanner plugged into the obd 2 port under the dash i watch the wheel speeds.in lr sensor when i rev the motor up i get different mph readings that follow the throttle.after 2 hours of screwing around(i am worried about time back flags-we get screwed on warrenty work)i give up and get a different job.thinking about it later-what makes ac in a car.an alternator.the next day i take the wires off of alternator and take car for a drive-no abs problem.there is nothing in ford manual about checking the alternator.for you members installing a efi system in a z consider making sure it gets clean dc current.cheeck the alternator output with a scope to see any ac wave form.the next hard part is getting paid for my time. Quote Link to comment Share on other sites More sharing options...
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