Miss fire help needed

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Joined
Jan 10, 2017
Threads
5
Messages
17
Location
LA CA
Hey Guys, new member to this great forum. I have a 93 80 series and have been having an odd misfire-ish type of an issue, wondering if anyone has experienced something similar, I have searched high and low and found many useful tips but without any resolve.
So on a cold start the truck idles fine like normal but once i put it in drive and put load on the motor if sputters and feels very weak, after about 5-10 minutes once warm she back to running normal.
I looked to see if any of the spark plug cables had any issues and pulled the distributor cap last night to check for crack, but just could a small bit of oil ( seal probably needs to be changed). I do also checked my CEL ( Ive been driving with 71 EGR a while) and I did have the infamous 83,84,85. Clear the codes and rechecked them when they popped after about 70 miles and it was just showing the 71 again.
I plan on changing the plugs and roar cap this weekend, any help would be mu appreciated!!

Thanks
-Max
 
Probably the wiring harness at the firewall that passes next to the EGR. Inspect it for brittle and exposed wiring. Lots of threads about this.
 
Could be wiring for injectors where it passes by the HOT EGR tube. Lots of discussion on this forum.
Thought that might be it also but when I checked the wires nothing looks out of place or melted.
 
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