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Old 03-02-2021, 04:52 AM   #12
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Join Date: Oct 2016
Location: Netherlands, Source of Grolsch

The 5xx series ecu's have several common failure modes with injectors stuck open, the fuel pump relay not staying grounded due to a failed driver and the 5v to 12v level converter failing. They designed this custom chip for it moulded in epoxy that can fail when the epoxy cracks and let's in air.

Start out with checking of the Injectors are stuck open, and if the fuel relay remains on. After that, possibly try another ECU, make sure to pull it of a running car, as they are somewhat likely to fail, especially those with a 'pink' label;)
Volvo 745 - IPD springs, 25mm/19mm swaybars, T-cam, LH2.4, M90 swap, 3.54 \w racingdiff lsd, track/daily
I sell LH2.4 Chips for Europe!
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