V8david Posted February 14, 2013 Share Posted February 14, 2013 Quick question regarding how well screwed down an ECU should be. While running through the flapper diagnostics (1989 3.5 Efi) I pulled the ECU (4CU) from under the drivers seat. There are 3 screws holding it down. The way they were screwed down the ECU sort of had it's own suspension. The back one (opposite end to the wiring connection, nearest the door) was almost tight down, the front two were only partly screwed in so the unit could spring up and down a bit, as if it has it's own suspension as I said. Is this right? Or should all three screws be down tight so the ECU is actually fixed to the car? Stupid question I know, sorry! Just seemed like a possibly good idea in an offroad vehicle but then the way it seemed to 'work' was a bit half-hearted, loose screws and the like! So.... is your ECU fixed down tight or is it springy?! Quote Link to comment Share on other sites More sharing options...
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