Question about Chevrolet Silverado 1500
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Posted on Jan 02, 2017
What year is the truck ? if its a 1998 im sure its never had a tune up i would start with replacing the spark plugs and there is a very good chance that a coil is also bad
Posted on Jan 16, 2009
It could be carbon deposits on valve seats keeping valves from totally closing. You can try getting you a can of motorcraft PM3 top end engine cleaner and get engine up to operating temp then remove one of the small vacuum lines from the intake and draw the contents of the can slowly into the engine.After you have drawn in the contents shut engine off and let it soak for about 45 minutes then crank it back up and let it run until it clears. Now it will smoke like a forrest fire while you are doing this so don't be alarmed,just tell the neighbors you are spraying for mosqitos.This may cure the problem. If not you may be looking at a valve job.
This can be verified with a compression test if this is what is causing it.
Posted on Feb 05, 2009
SOURCE: #7 cylinder misfire dtc p0307
Best place to start would be with spark plug and have a look at it. Wet with fuel would indicate no spark, carbon build up, bad wire or plug etc. If your familiar with testing at spark plug to confirm spark getting to plug, then do that first. If no spark to plug, coil pack would be next, or distributor parts such as cap, wires, rotor etc. If getting spark, then try cleaning and checking connections to injector. There are other more expensive things that may be causing it, but lets try the cheapest, most common and easiest first to narrow it down, and get back to me/us, if still having problem.
Posted on Dec 03, 2009
SOURCE: the code that comes up
It means that the number seven cylinder is not working correctly. Remove that plug and check for oil fouling. If it is heavily covered in ashy looking deposits than you most likely have a ruptured belly pan gasket under the intake manifold. A lot of oil cunsumption with no visible external leaks is another sign this gasket has gone bad.
Posted on Sep 26, 2010
SOURCE: 02 f150 5.4 dtc p0307
A code P0307 may mean that one or more of the following has happened:
* Faulty spark plug or wire
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector
* Burned exhaust valve
* Faulty catalytic converter(s)
* Running out of fuel
* Poor compression
* Defective computer
* If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
* If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Ford's will sometimes flag the wrong cylinders on misfires. Usually a coil will fix Ford's misfire. Spark tester to me just verifies that the the circuit is good. Dont relay on this to say the coil is ok.
Keep us updated.
Posted on Feb 02, 2011
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