Question about 2003 Ford Escape
Need some help!!!Ford Escape 3.0L 4Wd had codes PO 300,301,302,303,316,and353.I changed the plug and cop on #3 and cleared all codes.Ran about 30 minutes then just had code PO353.I had oil in the plug tube,which could cause a misfire due to bad tube seal.While changing with intake off i noticed that #3 intake port was totally dry,as if the injector wasn't firing.Wondering if this could be the issue,I have read that some vehicles shut down the injector if it misfires.The engine also has a loud tapping noise from the cam i am figuring that is due to the misfire on #3.I pray its not the PCM,as they are costly.Beginning to hate this car.will change gaskets to stop oil in tube but while its apart would like to know what else to check to get rid of this code.
I would think that many misfire codes would mean it runs terrible,coils go bad alot on the early ones,if it runs badly ,coils are suspect.
would say crank sensor if stiil runs ok,but the cam noise is not good,
lean or misfire won't make the cam noisy,something is broken in the valvetrain
Posted on Jan 03, 2014
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Posted on Jan 02, 2017
one thing to keep in mind that even though the vehicle is new you can still have major engine issues, because of the bearing material may have been bad at production.taking this in account any part on a vehicle can fail prematurely either because of poor insatllation or improper manufacturing. As far as oil filters are concerned bthe odds of mechanic installing the wrong filter are slim to none.the oil pressure sending unit only senses that here is oil flowing through it. it doesn't set the light off unless there is absolutely no pressure at all the only way to see the pressure is to have a gauge. oil prssure should be abot 45 psi at 2000 rpms. the only way a filter would effect oil pressure is if it was completely clogged. It would take a great deal of coolant in the oil to ruin a set of bearings and before that happens your vehicle would not run very well and you would notice a great amount of white smoke out the exaust. this would indicated either a blown head gasket.cracked head or a cracked block. you never mentioned what they found in the anaylasis of the oil. I presume that your vehicle is still under warrenty on the powertrain. I would suggest that you have the dealership check your oil pump out. every vehicle will have a small amount of metalic residue in the oil. large shavings and chunks of metal would be a worry. please rate this thanks.
Posted on Sep 25, 2008
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: 1997 ford f150 cyliner 7 misfire
After replacing the coil, plug and wire. The injector is working properly so I would say that you have a burnt exhaust valve. Get a cylinder leak down test or compression test to confirm this at a reputable mechanic.
Posted on Mar 04, 2013
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