For installing a chip on your GTi ecu, just follow the following instructions:

Start out by locating the engine computer on your car. It is located under the driver’s side dash. You will need to remove the bolts that are attaching it on its place, then carefully pull out the ecu connector by pressing the locking plastic clip on it. See the drawing below for reference on locating the ecu:

Once the computer is out, remove the top cover by taking out the 4 long bolts that secure the cover. Now, remove the 6 bolts that hold the top circuit board. You will notice them as soon as you remove the top cover. The picture below will show the location of the 6 bolts that need to be removed.

DO NOT pull the board up yet! Please, first notice that this board is attached to the bottom board with a flexible ribbon. Flip out the top board very carefully, not to brake the flexible ribbon. Look at the following picture so you have an idea of the attaching ribbon location:

Now, the chip to be replaced, is in the top board and will be covered with a silver colored label or sticker. First, notice the orientation of Pin #1. Write down if necessary, where that pin is facing to, as the new chip must be installed in the same direction. Very carefully, not to damage the circuit by overheating, unsolder the chip and after cleaning the excess flux with alcohol pads and verifying that everything is ok, no broken traces, etc., solder a chip socket (DIP-28) in its place and then just insert the chip in the socket, aligning it in the same way the prior chip was and firmly pressing down after making sure that all pins of the chip are in place on the socket.

It will help a lot if before soldering, you also align the socket mark for Pin #1. That way, it will serve as reference, making any future chip swapping easier.

Put back the board and the computer top cover and then re install the computer in the car. Make sure that the connector harnesses snaps in place when you push it in. Otherwise, some wires might not connect properly, causing problems.

Be careful with what chip you use as there are many sellers offering low quality chips. For example, a chip that we saw in a famous online market, stated that it works on 89-95 models. That is not true! Either 89-91 or 92-94.

A very good chip for this ecu is sold at:

http://www.OtherDeal.com

These will really work for 89-94 GT and GTi models. Do not be fooled by its low price. They pull very hard and are made by real professionals. Believe me, once you test one of these chips, you won’t want to drive your car without it ever again.

Copyright: www.TechnicalDomain.Net

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