How to remove Fuel/Ignition Chips?

[Beadybc]

Just a quick one, how do I remove the fuelling and ignition chips (https://postimg.cc/gallery/cvb357W) on my 940?

Do I gently pry them out?
Do I need a special tool?
Is desoldering required?

[Forrest]

I have never tinkered with these in a car, but I have done a fair amount of work with integrated circuits over the years.

Assuming you are replacing the larger chip that is sitting up higher than the ones next to it. You will find it will lift straight up out of the plastic “chip carrier” that it is installed in. With that sort you can just prise it up with a screwdriver under each end. Pry it up a bit one end then the other and it should come loose and just lift away. If you lift too much one end you may bend some pins the other end. If you do this slightly you can usually just bend them back with suitable pliers. Prise between the chip and the plastic carrier. Not under the carrier which is soldered to the board.

Make sure when reinstalling a chip you get it the right way round and line up all the legs with the carrier before pushing it firmly into position with your fingers. A notch or dot on the top usually marks pin 1 which should also be marked on the board or carrier. If unsure, see if you can identify pin 1 on the original chip first.

You can buy chip extraction tools, such as this. Personally I have always found them harder to use and more likely to bend pins than the screwdriver method. But maybe that’s just me.

https://www.amazon.co.uk/Velleman-VT...dp/B003U8DXNA/

The other, smaller chips on your board are directly soldered into the PCB and are not in a carrier. These would need unsoldering prior to removal. Removing and reinstalling a soldered chip is unlikely to go well for an amateur doing it for the first time with basic tools. I don’t think you need to touch the soldered chips to chip your EZK but if you decide that you do then you would do best to practice with some scrap PCBs first before messing with expensive hard to replace chips and boards.

Good luck!

[baggy798]

I use a small flat screwdriver and pry up each side a bit at a time.

You got a gold EZK or added a daughterboard to your stock one?

[Beadybc]

Originally Posted by baggy798

I use a small flat screwdriver and pry up each side a bit at a time.

You got a gold EZK or added a daughterboard to your stock one?

It’s a chipped gold EZK that I got off of Deeman940. I’m replacing the current custom chips with swede’s stage 3 ones as the guy who mapped these fuel/ignition chips isn’t responding so I have no idea what the map looks like.