Vortech Supercharged Lincoln Mark VII FLowmaster 50 Series Idle and Rev
My 1991 Lincoln Mark VII LSC Special Edition Idleing and some revs. The car was just started and the driveway was pretty dirty. The car runs rich untill its warmed up.
Vortech V1 10lbs, Stock GT40P longblock, Trick Flow Stage 1 Cam, 1.7 Roller Rockers, Ford Racing shorty headers, off road H pipe, 50 series flowmasters, Full 2.5" mandrel bent pipe from collector to tips. 1993 Cobra intake, 75mm Throttlebody, 76mm C&L meter, 39lb injectors, Anderson PMS Series 3, AEM wideband, Ford Racing T5Z HD Transmission, 3.73 gears, trac-loc rearend, 13" Cobra brakes upfront, stock discs out back, 17x9 '03 Cobra wheels, Toyo 255/55/17's up front, 275/45's out back.
1987 Lincoln Mark VII Brake Booster Troubleshooting Tips
Due to the critical nature of the first generation electro-hydraulic ABS
brake system found on the Lincoln Mark VII's and other makes, and also due
to their complexity and relatively high cost, I figured I'd make a quick
video going over some of the more common issues with these units and their
solutions. These are high quality units made by ATE in Germany, but nothing
lasts forever and they will eventually develop problems.
There are about three problems that can develop with these units:
- Diaphragm accumulator failure
- Pressure cut-off switch failure
- ABS pump relay failure
The most common problem with these units is that the nitrogen filled
diaphragm accumulator leaks to the point where it will no longer hold
pressure. Symptoms of this condition are a brake light that illuminates
every time the brake pedal is depressed. These accumulators can be sourced
through Prior Remanufacturing out in TX and are made by Hydac.
The second problem than can crop up is a failed pressure switch. When
failed closed, the ABS pump motor will run constantly. When failed open,
the pump motor will never operate and the brake light will be on, along
with a hard pedal. I'm not sure of the availability of the pressure switch
since I've never had one fail.
Finally, the ABS pump relay's contacts can become burned causing the pump
motor to not operate. The relay is easy to replace and is available in most
auto parts stores. This was only a brief, spur of the moment video to
introduce viewers to this technology and how to maintain it. Bleeding the
brake system is the best way to ensure against system failures.
If you need to replace the accumulator, make 100% sure that the system
pressure is properly bled off by pumping the brake pedal at least 20 times
without the ignition switch on. A fully pressurized system can generate
3,000 PSI which can cause quite a bit of damage if not handled