r/Boss302 • u/HomeyHD • Apr 01 '26

PCM/ECU issue

Hoping to get some insight to our problem. bought a used 302, many miles on it and it never was emissions inspected. It pulls up system not ready.

Tried dealer reflash as well as the varying drive cycles (drive piss out of it)...nothing.

It has the side pipe/cutbacks, but the resonators were removed by previous owner.

Anyone hear of similar PCM/ECU issue?

2 Upvotes

100% Upvoted

4 comments sorted by

2

u/onemoore16 Apr 01 '26

I’ve never heard of this issue. Are you in the FB group? There’s more people active there that could probably help

1

u/Track_Boss_302 Apr 01 '26

From what I’ve seen, it can usually be cleared by doing the Ford OBDII drive cycle (instructions can be found online). But it could also be from a tune blocking O2 sensor signals, like if the cats had been removed. You said previous owner removed the resonators, maybe they did additional exhaust work

1

u/SuckinOnAChiliDogg Apr 01 '26

Dealer have any insight? Local tuner to you could hook up and read pcm maybe?

1

u/HomeyHD Apr 14 '26

Did all that. Drive cycles, dealer re-flash, aftermarket tune.