I replaced the fuel injectors and glow plugs but my truck was still very slugish and it would shake in low rpms so i put it on the computer and the glow plug heater relay was bad so i replaced it and it ran great for 2 days and then it started doing the same thing again i put the computer on it again and it shows the glow plug heater relay is bad again i dont know what to do any suggestions

 

Is it missing, Or just running rough? What are your Codes? Anything Besides your Glow Plug Relay? How cold out? Most Likely , its being affected by wiring. If we knew what the code is, it would give us a better idea what the computers seeing!

 

Personally I'm not aware of any code that could be set due to a relay failure. It can set a circuit code. I would really like to know what your codes are so that I can look them up for you.

 

Thats where i was going!

 

Any Word on this?

 

OP has been back in almost a month. I'm going to close this. We can reopen it later if still needed.