Check distributor cap and rotor if you had no problems till then. Need to see if its not firing or not getting any fuel?
Too much gas. Maybe the fuel pressure regulator has failed. Pull off the vacuum hose to the regulator-if any evidence of gas in the vacuum line, regulator is bad-diaphragm has ruptured and letting in extra gas to engine through the vacuum line.
If that is good, no gas in vacuum line, have the fuel pressure checked. Still possible the regulator is not right.
Watch the pattern of gas out the bottom of injectors while the engine is cranked. Should see a fine mist cone pattern spraying out from the injectors. If it is just dripping, injectors may be clogged.
SOURCE: 1999 S10 Blazer 2WD 4.3L V6. Starts hard, idles rough.
you have a single injector under the intake plenum it has 6 branching fuel leads off of this.A very common problem is the regulator attached to this and it leak off fuel which falls into the intake .causing this problem. it needs to be replaced .i have done at least 80 of these in my career.this will fix your problem.thanks for choosing fix ya
SOURCE: 2000 Cavalier Z24 2.4l Car
You have an over fueling problem. The first thing I'd do is check the fuel pressure and regulator if it has one. It isn't that uncommon for the regulator to have a split diaphragm. If this happens, fuel will be drawn directly out of the fuel rail and into the intake manifold. The reason I said: "if it has one", some cars use a direct system with no fpr. You'll have to look along the fuel rail for somthing that looks like the picture I've attached. Pull the vacuum line off it and see if there is fuel coming out of the nipple, if there is, the fpr is bad and you've found the problem. The misfire code is likely being caused by the over fueling but it would probably be a good idea to change the plugs once this is resolved. Let me know what you find and if that's not it I'll do some further checking.
Dave
SOURCE: 99 chevy silverado running rough and stalling.
the problem you are discribing would lead me to belive your fuel filter is clogged which is a simple fix 3 dollar part at any part store or on the worse hand your fuel pump itself could be weak you can open the gas tank cover and have another person turn the truck key to the on position without going far enough to start you will hear a faint whining noise if it is going bad or a louder noise if it is fine Good Luck
SOURCE: Cold start-extremely rough idle-Shakes,smell fuel
Black smoke means buring rich. Have the vehicle's ECU scanned for codes and do the repair the codes describe. I'm gonna take a stab in the dark and say Mass Air Flow Sensor.(MAF)
SOURCE: 97 dodge ram no spark
then i would replace whats called the hall effect sensor its that black plastic plate you see when you take dist cap off. just pull rotor and lift up the sensor.dist cap is what holds it on.also under the sensor will be a stamped sheet metal piece that looks like the top of a castle wall. make sure its not loose on the shaft.if it is then new dist will be needed
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