L31MaxExpress
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The specific situations for the P0401 code stuff might be in my service manuals, if I feel like searching in them later.I had assumed he was talking Vortec here.
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The specific situations for the P0401 code stuff might be in my service manuals, if I feel like searching in them later.I had assumed he was talking Vortec here.
I could be remembering wrong, but my currently vague recollection of the details would've come from the factory manual pages on a code 32. Will have to look it up one of these days if I ever un-bury those manuals, which I probably will for this hot mess '93 in the driveway.Almost all TBIs I have messed with watch for a rise in intake MAP to determine if the EGR is active, not 02 voltage.
WHY would you want to?In order to bypass the egr valve
Yes, until you break a piston from detonation.on a 95 k1500 tbi, could I simply unplug the egr purge valve wire harness and plug the hoses?
Yes, it does.It does make a difference,
Closed. Has to be commanded open.I'm not sure if the egr valve is open or closed by default, without any instructions from the ecu.
I have run TBIs without EGR, never had a detonation issue. Was largely indifferent to it. That was on a carb to TBI swap.
That's why you run Hiwy Lean Cruise - you get leaner AFRs and advanced timing, to help burn the leaner fuel mixture, AND zero detonation. If you're gonna do it, do it right
I have a feeling that may be due to your elevation. While I was in the high plains of Texas, New Mexico and running from Denver to Pagosa Springs my 2011 Pathfinder saw fuel mileage it never see's down here. I had a couple tanks go nearly 430 miles where it usually only sees 350-370 at most here. Less air at elevation so already seeing less pumping loss.I actually do just that. Haven't really seen a diff in economy though.
I have a feeling that may be due to your elevation. While I was in the high plains of Texas, New Mexico and running from Denver to Pagosa Springs my 2011 Pathfinder saw fuel mileage it never see's down here. I had a couple tanks go nearly 430 miles where it usually only sees 350-370 at most here. Less air at elevation so already seeing less pumping loss.