LH-2.4 ECU required for 94 N/A 940

ShKa · 2025-10-09T03:15:45+00:00

Dear all I'm needing a WORKING ECU for my 94 N/A 940 .. Can anyone assist? ECU numbers compatible are apparently 0280 000 935/ 954/951/946/943 but these...

Major Ledfoot

Have you checked the EZ-K for codes too?

Via Socket 6.
https://www.volvoclub.org.uk/faq/EngineOBDCodes.html

ShKa

Major Ledfoot

yes - the tPS sensor reads good. But anything after that just flashes really rapidly.

jamesinc

Any relay you are suspicious of just short it out. If you have direct power to the pumps and your fuel pressure drops under load then you know you have a fuel delivery restriction.

ShKa

jamesinc Yep , that's what Im thinking.

ramrod

It would never be a bad idea to pull all the engine related relays apart (and their wires) for inspection.

I’m interested to know why the fuel pressure is dropping. It should be a constant 3 bar full time (under load or not) what happens when you remove the vacuum to the fuel pressure regulator and then go for a drive? Do you have the luxury of watching the gauge whilst driving?

The fact that it goes down to 2 bar is concerning but, doesn’t seem to account for the rough running

Further diagnosing is necessary.

dmc

have not read entire thread, has the fuel pressure reg been checked?

pull the vacuum hose off, fuel equls bad, dry equals good.

ShKa

dmc Yes , first thing I did . And I have a spare one which I used- no difference.

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