1988 Merc 220 xri...maybe a dumb fuel injector question?

[dfrants]

Got a 1988 Merc 220 xri thats running like its a 5 cylinder instead of a six. Spark is good but I think the #6 cylinder isn't getting fuel? Is this possible on a efi? Does each injector feed each cylinder? This will be my first time working on an efi so I'm alittle green...

 

[Dukedog]

injectors fire in pairs by ecu. 1 n 2, 3 n 4, 5 n 6.. if a single injector is suspect they should all be checked, cleaned and flow tested...

 

[Faztbullet]

Yep......also need to check compression as no fuel equals no lube to cylinder

 

[dfrants]

Are they difficult to replace? I found a different v-6 efi from the same year range that had an oil injection failure, but has 6 "good" fuel injectors?

 

[Faztbullet]

They are only good after they have been sent off,cleaned and flow balanced