So I did this EGR redneck bypass on my 94 with a shortened paper clip (couldn't confidently get a short wire to fit into the plug contacts) and all was good. Or so I thought.
make sure that the paperclip is making good contact with the pins in the connector,
I continued to check the temp of EGR tube after each drive, the tube was only slightly warm to touch, and not hot at all. (so I'm assuming it's not stuck open?)
the tube will always be warm due to its location and being bolted up to the head, if the egr was open or partially open the tube would be hot
So my questions are
Would a 1994 California fzj80 be different from other states? My 80 came from California. Would this mean I need a resistor (like obd2 80s need) instead of a simple jumper?
It should not be different cali or fed emissions, just the jumper wire should suffice
Could bypassing the EGR cause a brief code 25 lean condition?
No, probably the o2 sensors starting to go, the ecu is looking at the o2 sensors for fuel trim feedback. egr is emissions only and is used to control nox by cooliong the combustion chamber
Perhaps I should put everything back as stock, and start inspecting and cleaning the actual components of the EGR instead of bypassing to see if the code 25 returns. This code has never been present before the EGR mod and only popped up for a few seconds.
check the o2 senors. for what its worth i have driven my truck around with a 25/26 code for a while with no problem. connector for the o2 sensor got corrosion in it so after a wire repair and ne sensors no codes
Thanks guys for any info. Greatly appreciated.
Kevin
