2009 chrysler sebring changed spark plugs cause it said number 3 was misfireing them put in a new thermostat in it started up but then started back not wanting to crank it acts like its flooding

SOURCE: 1997 Nissan Sentra 4 cyl. Won't Start

You do not have a fuel pump, fuel pressure regulator, or other fuel-related issue.
What you have, in fact, is an issue with the fuel injectors. All 4 injectors get constant power, and the ECU provides a pulsed ground circuit (in milliseconds) to energize the injector (the ground completes the circuit, pulls the electromagnet open to let the fuel spray). If the ground circuit is constant, as in your case, you will have the injectors spraying all of the time, as you have described seeing fuel on the tops of the pistons. This can only be caused by these 2 factors: either you have a chafed injector ground wire shorting that wire to a ground on the engine, or a bad ECU.

SOURCE: 2001 bmw 325i is misfiring?

misfire happens because there is still fuel not burned in the cylinder so when its pushed out its burned in exhaust tube because the heat thats why you hear these small explosions. this caused if your sparking pluge not firing well . or there is a leak in the intake valve . in your case i advice you to check your sparking plug . if this helped pls vooote

SOURCE: 1998 ford ranger, number 3 cylinder mis fires.

When you change the plug what color is the tip of the old one? This could be the answer to your problems. It should be a light beige or tan if everything is working properly.Just take one of the old plugs down to your local garage and get the mechanic to have a look at it. He'll be able to tell you why it keeps misfiring. Hope this helps.

Vincent G

• 2363 Answers
• Posted on Dec 19, 2009

SOURCE: MIL indicates cylinder misfire on 1, 3, and 5

Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

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clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE
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Also remove carbon built up behind the EGR valve and the EGR passage tube.

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Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.

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EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.


Take it for a test drive.


Please rate my answer if it's useful to you.


Cheers,

Mustgo

SOURCE: oldsmobile alero misfires

a few things that could be happening here... When you run a tank dry, it often pulls the sediment from the bottom of the tank... this is very bad for fuel injection systems. Having it run "dry" like this could have damaged your injectors. I doubt the flooding of the engine with gas could have caused any damage that would result in misfiring. I would suggest starting with the cheapest solution first, which is Oil detergent. I prefer CD2 oil detergent. It is primarily used for sticky lifters, but can help with many simple motor issues. It costs a massive 5-8 dollars at any auto parts store or that "W-mart" store.

Make sure your oil levels are where they should be, and pour this product in the oil receptacle. Run the car for about 200-500 miles ( doesnt have to be in one trip hehe). After about 200-500 miles, perform an oil change (including filter). If this clears your issue up, great! it only cost you 30 bucks total.

If not...

Misfire is caused by 3 things and 3 things only. Fuel, Spark, AIr. These are what makes a motor fire. The second cheapest solution is timing adjustment. Any service shop like Muffler M. or Belle Tire, etc, should be able to perform this for 25-40 dollars. It is very possible during your spark plug / wire change, the distributor cap got turned out of alignment with where it should be.

While you have it at the shop, you should ask them to inspect the plugs and wires since thier hands are already on the device they are all connected to. This will remove or confirm one more possible issue.

The next step would be checking AIR. Airflow can be restricted by something as cheap as a cruddy filter, but rarely does this result in a misfire, so, even though its possible, im taking this off the table, Again, during the timing inspection, feel free to ask them to check it.

Another part of AIR is your EGR valve. This is a device that, put simply, recycles your exhaust. If your motor is dependant on this device, and it's cruddy, gummed up, or plain no good, it could be robbed of essential air and fuel. This can usually be checked with a "Code Check" at any service shop for free.

The final part is FUEL. Always the last place you wanna look, because it's the most expensive. This could range anywhere from Fuel Pressure, dirty fuel injectors, or a damaged fuel pump. Again, when you ran that tank dry, there is a possibility you pulled sediment thru one of these devices, or clogged your fuel filter. I hope, and you hope, if it is a fuel issue, it's just a dirty filter. I hope this helped.

All that is left is FUEL. This part is usually expensive no matter WHAT the