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Runs 20 min then cuts out, HELP!!!

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Old 12-17-2012, 05:58 PM
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Default Runs 20 min then cuts out, HELP!!!

91 Blazer, EFI, runs for about 20 and then quits. sometimes it starts right up again. Sometimes not. Have replaced the MAP sensor, Ignition coil, and the Ignition Module. Suspected fuel filter but if it was clogged would not fire right up again sometimes. Suggestions please!!??
 
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Old 12-17-2012, 06:06 PM
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just change the fuel filter. if you are having doubts about it. they are only a few bucks and quick to change. a couple of wrenches and a catch pan. just dont let the gas get in your eyes.....it hurts reallll bad. it could be a fuel pump acting up too. it could be talkin to you.
 
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Old 12-17-2012, 06:10 PM
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Originally Posted by Twip
just change the fuel filter. if you are having doubts about it. they are only a few bucks and quick to change. a couple of wrenches and a catch pan. just dont let the gas get in your eyes.....it hurts reallll bad. it could be a fuel pump acting up too. it could be talkin to you.
gas in eyes hurt,but not like brake fluids.


id change the pump. they are bad about going out. only go with ac delco or you'll be back in it.
 
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Old 12-18-2012, 06:53 PM
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So I replaced the filter and the pump today. Still no joy. Im out of ideas? Where should I look next?
 
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Old 12-19-2012, 04:19 PM
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Originally Posted by amrcnmade
So I replaced the filter and the pump today. Still no joy. Im out of ideas? Where should I look next?
how about a good ol' fashioned tune up? plugs, wires, cap and rotor... there can only be so much that is going to keep it from running.

or your distributor could be going out. does it surge or idle waaay up like around 2500 or 3000?
 
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