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View Full Version : Sr20det red top. No injector pulse on two cylinders.


Sweds13
11-20-2020, 10:58 AM
The car only runs on two cylinders. Gets spark fine on all. Swapped injectors, same cylinders that don't run. Ohms good on all injectors. Continuity from ecu plug to the injectors on all, so the cables aren't broken.

My conclusion is that it's not getting a proper pulse. Anybody got a idea of what could be the problem.

Thanks in advance!

e1_griego
11-20-2020, 11:16 AM
I've had a bad CAS cause that problem.

Sweds13
11-21-2020, 04:59 AM
I've had a bad CAS cause that problem.



But wouldn't that affect spark as well?

e1_griego
11-21-2020, 09:30 AM
I seem to remember that's the same problem I was having.

You can use a noid light (or some LED) to test for signal from the CAS to the ECU. If it's not the CAS it's probably the ECU. Or find an extra CAS and plug it in and spin it and listen for clicks from the injectors.

Sweds13
11-22-2020, 04:00 AM
I seem to remember that's the same problem I was having.

You can use a noid light (or some LED) to test for signal from the CAS to the ECU. If it's not the CAS it's probably the ECU. Or find an extra CAS and plug it in and spin it and listen for clicks from the injectors.


Yeah I'll do that, thanks! But regarding noid lights/led do I need a resistor? I mean the injectors are 11ohm

cotbu
11-24-2020, 04:54 AM
Make sure you have battery voltage 1st, its the simplest to check and repair. KOEO
From there you can do any of the other test, spin cas, manual trigger, etc.