Weak power amplifier

My '89 xjs shows signs of weakness…please tell me what voltage should be sent to pin 18 on ECU…
I believe this is my problem on my injectors not opening.

Thanks, Sloth (Ivan)

Car, engine… what did you try, etc.? What symptoms when?

Hi Ivan, time to place your country flag and vehicle info into your profile :slight_smile:

You are on the wrong list, Ivan.

On the S3 pin #18 goes to the throttle switch - which should not interfere with injector operation. On ‘our’ Jaguars; injection is triggered by coil ‘-’ to ECU pin #1. It should show 12V with ign ‘on’ - but ‘fluttering’ voltage with the engine running. Which is likely a common feature on yours - though at a different pin…?

xj6 85 Sov Europe (UK/NZ)

Moved to XJ-s…