Question about 2001 Chevrolet Astro
I have done all this and still have the 303 code flashing light when you step on gas. P0303 is cylinder #3 misfire detected. Start by changing the spark plug. If that doesn't clear it then try changing the plug wire. If that doesn't clear it, then you might need to look at the injector. Changed the drivers side heat censor aswell
Trouble Code: P0303 Cylinder 3 Misfire Detected Possible Causes:
Air leak in the intake manifold, or in the EGR or PCV system.Base engine mechanical fault that affects only one cylinder.Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector).Ignition system problem (coil or plug) that affects one cylinder.TSB 00-06-04-024 contains a repair procedure for this code.Here's what is listed for this code.303 means it's cylinder 3 that has a problem.To check injector,may be dirty,is to trade it out with another cylinder and see if the problem has left cylinder number 3 and it's at where the injector went.Was the spark that you replaced oily or clean.Could be a mechanical problem,bad piston ring,usually a oily plug in this case.Check for leaks by number 3.
Cylinder 3 Misfire Detected
Posted on Dec 31, 2012
Having some concerns that this an answer to a submitted problem, rather than the original problem. But you can check the car further by switching an injector to see if the problem follows the switched injector.
Also clear the computer of the Code. You could have a bad wire from or socket in the coil-pak. As the wire lengths are usually too limited to interchange with other plugs, it may not be possible to temporarily swap the sparkplug wires.
At some point, you will need to check your compression. Poor sealing of the valves, sticking lifters, or bad rings can create the problem you have. There is also a cylinder balance test some testing devices can perform on a running engine.
Please rate my info.
Posted on Dec 31, 2012
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: Check engine light on. I
Chek that the car computer is working properly .Seek for a professional electrical-mechanic that can check an diagnose your car computer. Sammyc47
Posted on Feb 21, 2011
Tips for a great answer:
Jan 06, 2014 | 1999 Honda Civic
Apr 15, 2013 | 2005 Ford Escape
Dec 31, 2012 | 2001 Chevrolet Astro
Mar 30, 2012 | 1997 Honda Accord
Jun 02, 2011 | Toyota Corolla Cars & Trucks
Apr 25, 2011 | 2002 Ford Mustang
P0303....Cylinder 3 Misfire Detected
P0304....Cylinder 4 Misfire Detected
sounds like a new set of HT leads and plugs wouldnt go amiss(fire wires) weird name that fire wires HT stands for high tension leads in proper english .
Mar 07, 2011 | Ford F-150 Cars & Trucks
Jan 28, 2011 | 2006 Cadillac CTS
Mar 24, 2009 | 1997 Toyota Camry
Aug 19, 2008 | Mitsubishi Galant Cars & Trucks
417 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: