Question about 2002 Ford Taurus
Rough idle in gear and runs good at road speeds
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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
The P0420 code is a Catalytic converter efficiency code check the compression.Swap the #1 injector to a different location to see if the code follows.Test the coilpak. A cracked exhaust manifold is the most likely cause p0171 and 0174 Induction air leaks, vacuum or some kind fuel restriction, weak fuel pump, restricted fuel filter etc.You also could have an exhaust leak near the upstream o2 sensor. If youtake it in they will probably use smoke to find out where the leak is.
Posted on Apr 22, 2009
SOURCE: I have a 2004 freestar
I just had the same thing. Engine light came on. Rough idle. Codes P0171, P0174, P2195, P2197. Within a week the idle got so bad it would die at stop lights. Seemed like a vacuum leak affecting the idle. Found it today. The elbow where the PCV tube enters the vacuum port on the upper intake was degraded, collapsed and had a whole in it. Wondered why it degraded. I disconnected the tube from the PCV valve and found it quite oily. I think the oil sat in the elbow at the intake because it is flat on top of the engine and could pool there, causing the rubber to degrad. Found a preformed piece of coolant hose at O'Reilly that was the right diameter and cut it to length. Put it on, runs like a charm. I ordered a new PCV valve because I think too much oil was coming through it and caused the hose failure.
Posted on Jan 05, 2011
Tips for a great answer:
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------------Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
----------This will help.Thanks.
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