Spitfire1975
Well-Known Member
Bronco Chuck - Think I can back probe somehow the O2 like I would the TPS?
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Hi Spitfire-
I have the exact same code and issue as you. Heavy load misfire/stutter. I have replaced EGR, DPFE sensor, verified vacuum.. etc. It seems like I may have the same year BII as you as well. Just today I removed the vacuum line from the EGR and blocked it to rule it out as an issue. (No difference.) During engine speeds above 2500RPM the bronco runs well. anything below 2000 and it sounds like a big misfire and the engine feels unbalanced. One thing I know for sure is that my EGR AIR tube from EGR to exhaust manifold has some problems. I thought bypassing the EGR vacuum might makee differnce, but nope.
Let me know what else you have tried.