Question about 2005 Ford Explorer
Car was diagnosed codes po174, p0300, p0301, p0302, p0305, p0306, p0316; replaced plugs, wires, hoses, cleaned egr valve; it started running good, still had a exhaust leak that we couldn't find; while driving it just turned off, and now won't even turn over. could it be the timing belt? help!!!
You can't have ANY Exhaust leaks BEFORE the
Converter or you won't get rid of the PO174 or have control
of injector pulse or fuel trim
You have a timing chain -no belt
Better use 5W-20 Full Syn Oil if want the
VVT Cam Actuators to last
All those codes are ignition cylinder misfires
All you have done so far is preventative maintenance,
what some call a tune-up which by the way ended some
25 years ago or more.
You have done nothing to diagnose the codes apparently
& find the cause of the fault codes
You have misfire on both banks no matter a V6 or V8
Easy to figure out,need a repair shop or study those
codes on the internet.
Check for vacuum hose leaks EGR etc
Forget the PO300 & 316 they are of no use to you
Do not use it until resolved as you don't know if you
have a Class A or B misfire that could damage the
O2 Sensors ( front ones) get replaced at 100,000 miles
You need a good battery- the motorcraft are okey & made
by johnson controls, but only last about 4 or 5 years.
Posted on Jul 12, 2013
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Posted on Jan 02, 2017
po301 thru po306 all misfire codes cylinder 1-6 remove plugs and replace them..... set the plug gap first
i suggest u replace the wires also if they never been replaced all these misfire codes can set the others and one is for the oxygen sensor ( 02s or HO2S) CIRCUT MALFUNCTION do u know how to check wireing systems
do the tune up plugs (set gap) .052-.056 change the fuel filter also. clear the codes hows it run
this info is for 98 E-250 4.2Litre
what engine do u have 4.2L or 4.6L i know it is a v-6 by the codes
Posted on Dec 15, 2008
these engines did have some exh valve issues, service bulletin 05-26-3. one other thing to verify is that the cam synronizer (CMP) is correctly installed. if its not right on, its way off.
Posted on Oct 14, 2009
SOURCE: Missing, running very rough at
the P0011 and P0022 are the camshaft sensors (both sides) are over advanced--common problem on Fords, and is usually a defective VCT solenoid (variable cam timing solenoid)-it will cause your other codes (P0300 random misfire), P0305 (#5 cylinder), P0307 (#7), P0316 (misfire at startup)-P0171 is a lean condition on side 1, where #1 plug is located (look for a vacuum leak, but a faulty VCT could also cause this)-is there any chance the last oil change set this off? The proper viscosity is very important and may have caused these codes.
The P2198 is O2 sensor signal stuck rich bank 2 sensor 1. Has the engine or sensors recently gotten a bath in oil (seafoam?)-this code indicates something of possibly an over zealous maintenance procedure could have damaged maybe the MAP sensor, or more.... Unfortunately, you have a lot of company. At least you didn't crack a piston or hydrolock the engine. Seafoam is pale oil, naptha, and alcohol. With more detail there should be a reason for all those somewhat related codes-post more information.
Posted on Jan 27, 2011
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P0305 is misfire in cylinder #5.
P0306 is misfire in cylinder#6.
P0316 is misfire on start up.
Have the plugs on those 2 cylinders, and the 2 fuel injectors checked, also check for spark from the coil on those 2 plug wires.
Please get back to us if you have further query or else please
accept the solution.
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Sep 05, 2011 | 2002 Mercury Sable
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