Hey all, first time poster here.

I've got a '94 ZJ with the 5.2L V8 and I've been having some issues with it recently, owned this rig for at least 5-6 years now and has been very reliable. When troubleshooting some issues I noticed that all 8 of my injectors are all only receiving 7.18v instead of the full 12v.

Anyone know what can cause this? I've checked multiple spots and googled many different things looking for what could be causing it. All my injectors are sitting between 14.5-15 ohms of resistance, I do have a minor parasitic draw in my electrical system but it takes usually a week to drain the battery if sitting too long.

I've cleaned up pretty much every ground and positive connection I can locate under my hood yet I cannot seem to figure this out.

Any help/advice is greatly appreciated.

 

Welcome to the forum.

The fuel injectors are directly driven from the PCM.

The PCM has three ground pins and three power pin connections on that large screwed connector.

Try removing and fully replacing that connection, to see if wiping has any effect.

This reply shows my PCM capacitor replacement.