Question about 1999 Chevrolet Blazer

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My 99 chevy blazer is getting intermittent fuel

I just replaced my fuel pump about 4 months ago and now my blazer is getting very bad gas mileage. I fill up and right at 1/2 tank I've only gone 100 or so miles. Also, I'll be driving and the oil pressure goes up as I step on the gas and then goes down when I step on the break. My blazer has also been dying on me recently while I'm driving. It'll turn over but it's not getting fuel. I'll wait about 5 - 10 mins and then try again and it'll start but only to die about 5 miles down the road again. I just tuned it up about a month ago (new spark plugs/wires, dist. cap & rotor, new air filter, new oil filter, etc).

I read in my Haynes book that if the oil pressure is not is below the specified pressure level that I should check the oil pressure switch/circuit because it'll act as a fuel pressure cut off device. Is this true? If so, where the heck is my oil pressure switch? For some reason the book doesn't say where it's at.

I would appreciate any thoughts. Thanks!!

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  • shata Mar 14, 2009

    same problem how do i check the oil pressure and where is the switch

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The catalytic converter could be clogged

Posted on Nov 03, 2008

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Well, your not much better off than me! i get 1/2 tank around 120 or 130 miles. The only reason the oil pressure would go down is because your not stepping on the gas, mine does the same. does your pump shut off if you turn the key to the "on" position (position before you start) and at that position, does the pump shut off?

Posted on Apr 20, 2009

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I have the same proble as cwazykowean oct.30, 2008

Posted on Mar 14, 2009

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SOURCE: Removed & replaced dist. cap and rotor on 1993 S10 Blazer 4.3 V-6

The firing order for a Chevy s10 depends on which engine you have. 1.9L engine the firing order is: 1-3-4-2 . Distributor rotates counterclockwise. 2.0L engine the firing order is: 1-3-4-2 . Distributor rotates clockwise. 2.5L engine the firing order is: 1-3-4-2 . Distributor rotates clockwise. 2.8L engine the firing order is: 1-2-3-4-5-6 . Distributor rotates clockwise. 4.3L engine the firing order is: 1-6-5-4-3-2 . Distributor rotates clockwise.

Posted on Jul 03, 2009

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