Question about 2002 Ford Escape
New tune-up in 10/12 (OEM 100,000 mile Platinum plugs), replaced all 3 CATs in 10/12 (firewall side and rear), & 12/12 (radiator side) , replaced firewall side CAT again in 1/13. Firewall side CAT was burned to a crisp inside! Also replaced Idle-Air Control and EGR valves & DPFE (EGR pressure sensor control valve) in 11/12. The idle STILL fluctuates between 200 & 400 RPM, won't idle at normal (around 700-800 RPM), and there feels, when driving, like it's misfiring (jerky while driving intermittently) & when stopped at a light or stop sign (idles roughly and jerks/lurches, idle fluctuates) when warm, but no engine light comes on, and throwing NO codes on the diagnostics. Seems to idle fine when you first start the car, idles around 500-600 RPM until it warms up a bit, maybe like a few minutes with no issues, no miss, no idle fluctuation, but once you start driving after a few minutes, it starts to do it (like after driving maybe 10 or 15 minutes). I mostly use Shell gas, and have dumped in some injector cleaner, but hasn't helped. Also had it checked for vacuum leaks in hoses and gaskets, cracks in cylinder, O rings, etc., but nothing shows up anywhere Any suggestions?
No such thing as a tune-up
All you did was replace spark plugs which should be
done every 3 years
Oxygen Sensors get replaced at 100,000 miles which you
You most likely have an intake gasket leak,smoke test
the entire Evap System & Engine
You also are have bad igniton coils
Posted on Jan 18, 2013
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Posted on Jan 02, 2017
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