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woitw1
Novice
Oct 14, 2006, 1:28 PM
Post #1 of 6
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s-10 flooding
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i have a 93. chevy s-10 that starts and runs fine for a few miles and then it starts dumping
fuel into the engine cutting out,bad gas milage,black smoke from the tailpipe.
i changed plugs,wires,distrib cap,o2 sensor,heat sensor
HELP
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DanD
Veteran
/ Moderator
Oct 15, 2006, 3:27 AM
Post #2 of 6
(1824 views)
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Re: s-10 flooding
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Just a guess here, but try a MAP (manifold absolute pressure) sensor. It’s an electronic vacuum gauge; that tell the computer how much vacuum the engine is producing. Low vacuum signal relates to high load and the computer will add fuel.
Like I said just a guess but the MAP sensor is cheap to buy and worth a try? Maybe before replacing it start the engine, remove the vacuum line to the MAP and see if there’s vacuum on the line.
Dan.
Canadian "EH"
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junior8
User
Nov 10, 2006, 6:14 PM
Post #3 of 6
(1790 views)
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Re: s-10 flooding
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i'd also try a temp coolant sensor,as these new engines have no choke to choke engine on start or after heat up,could be malfunctioning after certain temp and dumping more fuel than it needs to,i had a89 s-10 4.3 that ran great till about 160 degrees, than puked and choked every where,a $9.00 coolant temperture switch fixed it.
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woitw1
Novice
Nov 11, 2006, 9:25 AM
Post #4 of 6
(1782 views)
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Re: s-10 flooding
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the s-10 quit running ,it's getting fuel and spark.the timings close enough to at least fire up
i have replaced the o-2 sensor,heat sensor,distrib cap,rotor,ignition module,spark plugs and
wires, and checked the ignition coil and pick up coil. it has good fuel in the tank.
could the temp sensor keep it from starting ? it is still dumping fuel so i disconnected the injector leadsto try and burn out the fuel in the cylinders but all it does is sputter (barely)
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Keoni
Novice
Nov 11, 2006, 6:09 PM
Post #5 of 6
(1778 views)
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Re: s-10 flooding
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Aloha Look down through the throttle plate ( butterfly ) with flash light --look to the right rear ( looking at the car from front ) you will notice puddles of fuel at the back of plenum ( manifold ) --if this is true remove the upper plenum and take note of the fuel lines where they enter the manifold--upon close inspection there will be a void in the pressure line ( smaller one ) also after the upper manifold ( plenum ) is removed STAND BACK just TURN THE KEY ON FOR A MOMENT you will see gas spray. Hope this helps
Aloha and A Hui Hoi
Keoni
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tim74
New User
Nov 26, 2006, 12:33 AM
Post #6 of 6
(1758 views)
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Re: s-10 flooding
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I've also recently learned that the air charge temperature sensor can also cause excess fuel dumping. My brother's was an 88 s10.
(This post was edited by tim74 on Dec 3, 2006, 10:52 PM)
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