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HOW TO DIAGNOSE FMS AND REDLINE PROBLEMS

HONESTLY, CUSTOMER PROBLEMS WITH THESE PRODUCTS ARE USUALLY DUE TO NOT READING OR FOLLOWING OUR INSTALLTION DIRECTIONS EXACTLY. WHERE WE INSTRUCT YOU TO PUT THE WIRES IS VERY IMPORTANT FOR THE BEST OPERATION OF OUR PRODUCTS.

MOST COMMON PROBLEMS,,,,,,,,,,,,,,,,,,,,,,,,,,

DISPLAY SHOWS JIBBERISH, NOT WHAT IT SHOULD, AFTER
START-UP

Box has lost 12 volt power or ground while the engine is running, either 12 Volts on the small red wire or ground on the big black wire, or your small red wire is NOT on fuse number 9.

Check tightness of the brass tap on the top leg of fuse number 9 and other crimp connectors on small red wire and fuse at fuse-box on left side of dashboard. Redo Skotchlok connection on big black wire from box, at black wire with tan tracer at injection pump plug.

DISPLAY DOES NOT LIGHT UP

Verify 12 volts on small red wire, and ground on big black wire at injection pump black with a tan tracer. If this doesn't fix it box probably was either hooked up backwards, or got a high voltage spike, causing it to blow the soldered-on 1 amp fuse on the circuit board, or lose its programming, or both. Send to BCDP for approximately a $65 repair, plus return UPS shipping. Please call for unique address for where to send it for repair.

RED LIGHT FLICKERS UNDER LOAD

This is always a bad connection on either the big red or the big black wire. If you have a "Pump Cover" loosen lock nut and tighten the allen screw a half to a full turn, and if not using a cover, redo the big red wire connection at the pump, and if that doesn't fix the problem, then redo the connection on the black wire at the pump.

SCREEN DISPLAYS " F2 ERROR",,,,,, FMS ONLY

Replace fuse in black fuse holder in back panel of box, 5 amp fuse.

REDLINE DOESN'T ENHANCE FUEL, BUT DISPLAY WORKS

Check and possibly replace the 7 amp slow blow fuse in back panel with an ohmeter, as they usually burn out at the end where you can't see the break!

PYROMETER READING FLUCTUATES RAPIDLY

You are not using our supplied special type K thermocouple. As there is so much radio interference under the hood of these trucks, it is necessary to use a special style thermocouple to eliminate this problem. Read the product installation directions if you want to try and use your present thermocouple.

PYROMETER READS LOW

This is a result of us using an unusual type K thermocouple. It is not low, but rather it is slow, so don't worry about it, or use any other type K thermocouple and tolerate the fluctuations.

DISLAY SHOWS "PUMP CONNECTION" ALL THE TIME AFTER
START-UP

Check to see if there is 12 volts in the big red wire with the ignition key on. If there is battery voltage there, then you have a failed processor chip on the circuit board. Most likely this failure is due to reversing the big red and black wires during installation, or a static electricity caused voltage spike. Return box to BCDP for an approximate $125 repair, plus return UPS shipping. Please call for unique address for where to send it for repair.

CODE 237 REPEATEDLY BEING SET, OR MAP SIGNAL VOLTAGE ERRORS, or truck runs better with MAP harness un-plugged from factory harness

This is usually a MAP harness issue, and not the box. To diagnose this issue, go to INSTRUCTIONS on our Home Page and then to Diagnose and repair low MAP voltage issues

FMS BOX ENHANCES FUEL IN "DRAG RACE" MODE BUT NOT IN "STREET" MODE

This is usually a MAP harness issue, but if after following the above diagnosis for the MAP harness the problem still exists, send to BCDP for an approximate $125 repair, plus return UPS shipping. Please call for unique address for where to send it for repair.

BOX GETS REALLY HOT AND DOESN'T FUEL CONSISTENTLY

This usually only happens on really old versions of our FMS boxes and can be diagnosed by shaking the box in your hand and if you hear a rattle, then it PROBABLY has melted the power resistors off of the circuit board. This can be repaired and upgraded to the newer style for about $65.00, plus return UPS shipping. Please call for unique address for where to send it for repair.

 

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Updated April 22, 2014