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1998 Suburban randomly loses power while driving or at start up. The vehicle just died while driving...wouldn't even attempt to restart..no accessories had power. Also, randomly won't start like battery is dead. Starts off a jump and runs fine. Can run fine for days or weeks. Recent spark plugs, wires, cap and rotor. Battery tests fine. What could it be?
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If it is a diesel vehicle check the pressure of the diesel pump. It would appear that the diesel pump on this model wears out and it loses pressure. If the pressure is ok there is switch/filter on the common rail that might be blocked. Unfortunately it appears that this switch can not be cleaned but must be replaced. hope this helps.
How old is the battery & have you tested it? How is it that a month went by & your using any vehicle that could let you down? Why have all issues not been resolved ,as soon as they started? Have you checked for codes? Have you had a professional scan tool on it & checked data,that has to be done along with many other checks or tests,unless it's just a battery issue. No one can solve any vehicle issue over the internet There is always more to the story & you need the patient
Its called the fuel pump cylinoide which is attached to the fuel pump. Unless the fuel pump is bad, you got an expensive part to buy around $2500 or the cylinoide is $900 whichever is broken. This is a know issue for GMC deisel suburbans 6.5.
there is water in the fuel, there should be a fuel water seperator in the engine compartment, look in your owners manual and it should tell you the steps to drain the water from it, it should take a few minutes
I had a 99 Suburban that did almost the same thing, it turned out to be the Catyletic Converters were plugged. Try taking the exhaust pipe loose at the manifold for test purposes. If it runs good with the pipes loose, that's the problem. Replace the Cat's. There were no codes for either, it would start and run nice for about 5 seconds, then run rough and then stall.
Had the same issue a few years back...and now something similiar.
My car would randomly shut off whether on the high way or not. Just replaced battery also. Brought to dealer, tested Batter/Alternator, and ended up with being just a loose battery cable. Fixed for about 4 years now.
Currently, I have a loose battery cable or ground, because the battery/alternator is fine, but when its cold, sometimes when I tap my brakes, the radio goes out randomly. Or lose all power after turning the key on, and move the positive battery cable around, and then everything works fine. So I am still trying to see what the problem is, just sounds like a cable or corrision.
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