imported_loudsubz

For an OBD-0 ECU

PG7

1.) Uninstall the ECU from the firewall of your car.

2.) Open up the ECU by removing the 4 phillips screws on both sides of the case to reveal the top and bottom portion.



3.) Locate the R62, 64, and 66 Resistors from the PCB



4.) With soldering Iron or Hot Air soldering gun in hand, apply some heat to the back of the resistors, untill the solder starts to liquify again, add a solder wick or desolderign suction tool to remove the solder. Once the solder is removed you can pull the resistor off the board from the front.

When done the board should look like this on the back side


and like this on the front side


I used a 40 watt soldering iron, but lesser wattages are fine like 25watt etc. I reccomend a lower wattage for heat reasons, so you dont burn the board or other traces. I used a 40 because i like the heat capacity on it, and once you work with them alot you know the limits.

This is not a DIY if you dont feel comfortable, you could potentially ruin the ecu.

Once done clean the back of the board with some rubbing alcohol or solvents to remove the solder rosin from the board.

Put it back together and your done.

The end.

imported_dented dx

this should be a sticky

R0Y

what about OBD1 OBD2?

red90dx

good job,

as far as obd-1 have alook on pgmfi.org