SuperMotors.net Forums
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 Posted:10/3/2012 08:26 |
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Bought this truck from dealer with 221K on it, have 2 other F-150's but with in-line 6's that have over 300K on them. This is my first experience with a V-6.
Truck ran fine on initial drive out, then began a slight miss @ idle.
Gas consumption escalated very much!! Put on computer. Shows bad EGR valve & a miss on 2 cylinders. Exp. Mechanic bud says there's a sensor on exhaust to check the EGR valve & most of the time the EGR is OK but the sensor leads have burned away.
Anybody have any knowledge? Could this be causing the miss & poor mileage? |
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 Posted:10/3/2012 09:30 |
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Missing and poor mileage can be caused by a bad coil, bad plug wires, bad spark plug, vacuum leaks, a bad sensor, or a bad sensor wire grounding out. Try a good tune-up FIRST(plugs, and wires). Also, check for vacuum leaks. Some of those little plastic tubes do wear out from heat and age. .
If this doesn't help, try replacing the coil (or coils, one at a time). If it still is acting up, then go for the sensor for the EGR valve, checking the wiring BEFORE replacing the sensor.
IMPORTANT: Be sure to clear the codes from the computer after each step, because if you leave them in you WILL NOT KNOW if you solved the problem. I know of a guy who failed to clear the computer codes, and after spending over $1500 changing parts, he still wasn't sure when the problem was cured. He finally had the code cleared and it never rose its ugly head again.
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PROUD MEMBER of www.crownvic.net
It's just a SUPER-DUTY Mustang GT Sedan. 198K miles and still rolling HARD.
1997 Crown Victoria P71 SVT *** ex-US Marshall service (the CAR)
STOCK?? I bet it was modified. 
13.26 @ 107.24 MPH 1/4 mi w/ me, tools, & full tank of 93 octane
I added CAI, NICHE 19 X 8.5 " wheels with 245/45ZR 19 rubbers, and completely rebuilt the front end with poly bushings, Kooks headers, 2 1/4inch exhaust, TCI 2200-2400 rpm Stall converter
.PLANS:: engine upgrade, 5.4L 2v stroker, rebuild interior in leather w/ buckets, thinking about turbos
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