Question about 2002 Ford Taurus

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Engine light My engine light is on, and it idles pretty rough. It also loses power sometimes.

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You have to scan it and see what code is in it if it's a p0171 or p0174.check for vaccum leaks.they will cause both your engine light to come on and run rough.if you have ap0301.p0302 ect.that means you have a miss fire

Posted on Jun 25, 2008

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How do I fix, bad idle in suzuki swift , check light on, no codes.


the title is contradiction
" check light on, no codes."<< totally wrong
scan it one more time with a REAL scan tool this time. (there are DTC errors , or codes as you said)

what does bad idle mean? misfiring, or idle speed too low
or too high? RPM, or
surging?

say what that means please.
and more important is engine hot or cold ? failing.???? or both????
there are over 50 causes.
but can be broken down to simple physics and gauges.
1: engine bad, lost compression.
2: engine cant breath, dirty air cleaner
3: ISC stuck closed or open or just stuck. (bad idle air supply)
4: bad spark, 1 or all 4 (never had a tune in this decade.
5: cam drive, slipped (belt) causing #1 failure.
6: air fuel mix too lean, and causes rpm drop and ISC fails.
7: air fuel mix too rich and misfires.
8: egr stuck open, it misfires and ISC gives up.
9: cat clogged, engine cant breath #2 like.
10: and the vast other reasons for misfire.

we cant drive it, see it or hear it misfire, so.....????

there is a test for all 10, ask. or get car serviced.

Jul 29, 2015 | 2010 Suzuki Swift 1.6

1 Answer

My 2007 Chevy Silverado loses power when I come to a complete stop no engine lights appear but if I turn off the truck the problem goes away for awhile .


Loss of power, but no mention of rough or inability to idle (including stalling). If those additional symptoms are part of the problem, check for a vacuum leak to the intake. Listen for hissing or sucking noises near air hoses. Look for loose, cracked, or broken air hose connections. Check PCV valve...Cheap to replace, could be sticking, then loosen after truck sitting with engine off. A vacuum leak will not give any light indications, and vehicle will seem to run normal when applying gas, but will want to stall or run rough (or want to stall) when at idle or sometimes when taking foot off gas when slowing down.

Oct 08, 2013 | Chevrolet Silverado Cars & Trucks

1 Answer

My 2001 Camaro idles really rough, loses power when accelerating, and the check engine light starts flashing.


ALUMINUM V8 CAMAROS HAVE 3 PROBLEMS
1 VACCUUM LEAKS ie HOSE TO THE pcv deteriorates
2 MASS AIR FLOW / hard to diagnos sometimes
3 COLLANT temp sensor, ie starts fine cold, crappy when warm

Oct 10, 2012 | 2001 Chevrolet Camaro

1 Answer

Loses power going uphill


Could be low fuel pressure, or a long list of other things.
Is the check engine light on ?
Does it feel like it is running rough, or starving for fuel ?

Sep 17, 2012 | 1997 Mercury Villager

1 Answer

2000 ford focus engine light on. what could be


Hi
1 is the car losing power?
2 is the car rough at idle? or slightly over reving.

If so most likely cause for 2 is the air mass sensor, this go's to the air box you can cleran them with carb cleaner and sometimes this will fix it.

Get back to me for more ingo.

Regards
Dan

Feb 09, 2010 | 2000 Ford Focus

1 Answer

Check engine light is on car seems to idle rough


seems like bad spark plugs or wires.

Jan 26, 2010 | 1998 Dodge Durango

1 Answer

Rough idle, power loss while driving


check /replace the fuel filter and check the fuel pump pressure before and after the bleed valve to the throttle injectors

Jan 20, 2010 | 1992 Chevrolet K1500

1 Answer

Truck losing power and service engine soon light on


Like to other guy said, give it a tuneup. Also try SEAFOAM to clean carb up of slug. Also check to make sure the butter fly for the choke has not come loose, causing it the choke it down. Failed choke pull-off.

Dec 10, 2008 | 1995 GMC Sonoma

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