Hello I replaced my ecu and i am not getting a CEL light for 5 seconds. There is a one click when I try to turn the key behind the ecu. What can it be and where should I start. Any help will be gratefulI sent a spare ecu to ECMTuning this week. My other ecu was sent to foreign auto for repair...

In this guide I will be describing how I replaced the MPI relay for a 1990 Eclipse GSX with 3 Bosch-style relays. This approach is useful if you had a MPI relay go out and you don't want to pay over $100 for a new one or if you are worried about sourcing one of these units in time for a...

I was wondering if someone with a working 1G MPI relay could do me a huge favor and test the coil resistances for me. It should be MPI pins 10+8, 3+7, and 9+6. Below is a diagram (from https://projectzerog.com/wiring_info.shtml) that shows the pin locations for the connector.Thanks!