I was just driving home, and after I turned the corner at idle, my truck surged up and down three times than stopped doing it, now it seems fine, RPMs went from idle to 1500 or so just up and down, really strange, PCM or something? Anybody have any ideas??? [img]/ubbthreads/images/graemlins/shrug.gif[/img]
Are you running a chip? A loose chip could cause that. I'd also check your valve cover harness connectors for a burnt pin. Those things are pretty easy without tearing into much.
I`m not sure why my truck info didnt come across in the first post, my truck has the hypertech programer, just did the glow plugs a couple of months ago, gaskets looked fine, not doing it now, just that one time, but it makes me nervous, I dont want it doing it when I really need the truck and when its not close to home.
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97 F250 CCSB,Dana 60 stright axel conversion,3:55`s,Tymar intake,3" down pipe, 4" Diamond exhaust,5" stainless tip, no kitty,Superchip 1705,35x12.5 17BFG/MT sipped,RanchoRS9000X,Energy Suspension Bushings throught,Warn bumper&Winch,canopy,17x9 Eagle alloys,Warn hubs,Mag-Hytec Diff covers with Amsoil,Stainless wheel flares,stainless rockers & bed trim,Tru-cool 4590,Autometer guages and A-piller tri-mount
My truck did the exact same thing a couple of weeks ago. I had a couple of other symtoms, indicating my alternator was going south. Had the batteries checked they were ok, the alternator was checked also, showed it was charging fine at the time, but an error came out on the tester that the diodes were going out. They gave me a "new" rebuilt one, put it on and it has been fine ever since. I had it checked at Auto Zone. Good luck
Scott
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1996 5 speed, extended cab, 4x4, stock, 159000 miles
I just put two brand new batteries, new GPR as well, could it be the CPS? it didnt do it today on the way to work at all, I will have to see if it shot any codes when I get home from work, I`ll double check the voltage and the Tach jumped up and down when it happened, it only lasted about 5 seconds, but my wife was 500 yards away and she heard it. Strange Huh
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97 F250 CCSB,Dana 60 stright axel conversion,3:55`s,Tymar intake,3" down pipe, 4" Diamond exhaust,5" stainless tip, no kitty,Superchip 1705,35x12.5 17BFG/MT sipped,RanchoRS9000X,Energy Suspension Bushings throught,Warn bumper&Winch,canopy,17x9 Eagle alloys,Warn hubs,Mag-Hytec Diff covers with Amsoil,Stainless wheel flares,stainless rockers & bed trim,Tru-cool 4590,Autometer guages and A-piller tri-mount
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