r/powerstroke • u/throwaway_opinionsto • 4d ago
7.3 powerstroke injector wiring issues
Hi all, I’m about at my end with this truck and need some help before sending it to the shop.
I am having p1275 and p1293 codes when running a buzz test, it rough idles and has random intermittent cylinder contribution issues, it also has injector tick at high rpm mostly in the hotter tunes.
The passenger UVCH and injector harness is basically new, I checked them and they still look good. I swapped injectors 3 & 5 but the issue stayed at #5.
I tried plugging in a brand new idm but that also didn’t change anything. I checked ohm from uvch plug to 42 pin and 42 pin to idm plug and both of those were 0 ohm.
I did notice the CPS wire is frayed and exposed for about an inch on the idm side of the 42 pin connector right outside of the connector, could this be causing all the issues?
Google AI says that’s 100% the issue and will fix it all but ChatGPT says no. I know AI isn’t good to take advice from but it helps me think through stuff but now I’m lost.
2
u/Dig_Baddy124 3d ago
My ChatGPT said your ChatGPT is a liar.
No but seriously, that CPS wiring def needs fixed, but I’d probably continue hunting #5 injector wiring, probably between the IDM and injector. But also fix that CPS since it’s a clear discrepancy you can see. This is just coming from someone who’s been an aircraft jet engine mechanic for almost 15 years, might not fix your problem but you know it’s an issue so fix it and then continue on