Question about 2000 Ford Focus

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Starts really rough and shakes but after warm calms but still idle fast and slow intermittently.

Posted by Anonymous on

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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chuck943

Chuck Martin

  • 783 Answers

SOURCE: Rough idle when engine is cold 1997 Explorer V 6

There are 2 common problems on this concern. 1st maybe a dirty MAF sensor. Remove the MAF sensor and clean it with a good electrical cleaner and air dry or light shop air,then reinstall and do a couple of wide open throttle burst to reset it.
2nd problem and we see alot of this is the orings between the upper and lower intake manifold leaks.You would have to remove the upper intake manifold and replace them.

Posted on Jan 29, 2009

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stevieger

  • 184 Answers

SOURCE: 2000 Focus Zetec-rough idle, very rough under load.

you haven't said if its petrol or diesel so i'm assuming its petrol since your smelling sulfur sounds if you have a misfire causes could be plugs,leads or ign coil i suspect its ign coil these are common to go.

Posted on Mar 25, 2009

Anonymous

  • 1 Answer

SOURCE: Rough idle and acceleration

I am not a mechanic, so I dont know for sure, but it sounds like a problem I had with my car. It turned out there was a bad wire. We serviced the wires and spark plugs and problem solved.

Posted on Apr 06, 2009

ourhowse

Dar

  • 2007 Answers

SOURCE: it idles fine when cold but when it starts to get warm it idles rough, you can feel it going up and down not badly but i can feel it and see it on the rev counter

Faulty idle air control valve. You could try and clean it with some carb cleaner, or replace it.

Posted on Jun 03, 2009

DFARLEY

  • 116 Answers

SOURCE: 87 Ford F150 idles too fast

either a vacuum leak or an idle air control valve problem most likely.the iac is on the side of the throttle body.cylinder shaped with a small harness.

Posted on Jun 12, 2009

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95 saturn strn with automatic transmission running really rough and stalling when I stop. what should I do I


Hi Duane:
Think I'll "shoot from the hip" on this one.
Just for the fun of it, check the pcv valve and the related vacuum lines.
The auto choke when cold means running rich and the fast idle is OK. When it warms up it wants to run lean and it sounds like it might be too lean. PCV or vacuum leak may be the problem.
It also would be a reasonable idea to to a carb flush and to add a conditioner like SEA FOAM to help clean things up if the fulel gelled while it was parked.
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My 1994 samurai idles really high when I first crank it, but later slow down. is there anyting I can do to ?


From a cold start my sami idles really fast, but as I drive it and the engine warms up it will idle correctly. Is there a way to make it idle slower from a cold start?
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Bad idle


chk/test yr plugs also. If it starts to break down then chk soliniod & coil as u may be getting the start of a bigger problem. yr symptoms r showing signs of an elecrical problem. rough warm ups r the signs. c/be choke sensor also causing roughness..

Sep 04, 2012 | Cars & Trucks

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Car idles and runs rough intermittently after engne is warm.


it could be plugs and or high tention leads, causing missfire best way to check these is better at night open the hood of the car, run engine and see if you are getting a loose spark, that will be your high tention leads it could also be that when they get hot, they expand and start reducing the power of the spark to the plugs if you find that these will need replacing, to test spark plugs, get a pair of pliers and preff a pair of rubber gloves, pull the leads off each plug one at a time, if there is no change on one you pull of, that plug needs replacing, continue till you have checked all of them, hope this helps

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Why is my 1994 Chevy S10 Blazer lugging? motor shakes and lugs.


Could be vacuum leak or bad ignition wire(s).

I had a similar problem on my "93 Ford probe. The engine idled pretty rough with shakes, Turned out to be a head gasket leaking engine coolant into the cylinder during low rpm's. At fast rpm's it was fine becuase the internal cylinder pressure was greater than the hot coolant pressure & would prevent the coolant from leaking in.

A friend has the same problem with his "94 Blazer 4.3 L, throttle body injection, manual tranny. He hasn't fixed it yet, It started a few weeks ago & is getting worse. His gets a fast idle with hiccups which causes the engine shake. He already checked the EGR valve. He also has a severe exhaust problem, Not oilly but very gray & terrible smelly, but only when the fast idle problem happens. THis fast idle hiccup problem starts when the engine is warmed up.

Nov 19, 2008 | 1994 Chevrolet S-10 Blazer

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