Question about 2001 Mazda Protege

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When the car idels the rpms will go up and down and the engine almost stalls

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First thing first, have the compression checked in each cylinder. Usually it is from low compression in one of the cylinders. After you have done this, If everything is ok, let me know at, and I will tell you what to do next.

Posted on Jul 17, 2010


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Wont idel down till vehicle at a stand still, no pedals depressed an trans in nutra , engin will stay at 13-1400 rpms till comes to complet stop then idels down to 65-700 rpms. Whats causing this ?

Depends on your cars set up but on some engines there is a device either electronic or mechanical that keeps the throttle from decreasing too quickly(inhibits rpms from rapid deceleration) so you don't feel like your car is down shifting while coming to a stop. If it becomes gummed up it will stick causing the problem you are describing. You can usually clean it up with a little dis-assembly and a can of carb cleaner.

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02 honda accord wont idel if does be real rough then stall, replaced dist. plugs and wires

Check your EGR valve, see if it's stuck open. Next look for vacuum leaks, then check cam timing. Check engine light on? If so, get the codes.

Mar 04, 2015 | 2002 Honda Accord

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My suit up engine will not stay ideling do I need a bigger carburetor or should I instill a bigger stall converter

What you may need is a 2000rpm stall converter. It is a converter that has fewer plates inside it and so is less efficient at low rpm's . IT works at around 1500 - 2000 rpms when the engine is approaching the torque performance curve.. BY suit up engine I take it that you have had extensive engine rework to make it really go, in which case a standard converter loads up the engine and stops the cam shaft and air flow from operating correctly hence the stall situation.. They cab be bought from speed shops that specialise in reworked transmissions

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Rouph idel

You'll have to figure out if it is a fuel or ignition problem.
Is the check engine light on ?

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Idels fine when driving it sometimes loses power and stalls if you rev the idel above 3000rpm it stops and runs fine till you stop or slow down the idel below 3000 rpm it shutters and...

If you don't have a check engine light, Start with the air and fuel filter, work your way up to a tune up. Clean the throttle body as best you can on the inside, behind the throttle plate/s

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1 Answer

When ideling the rpms pulse slightly what is the

Plugged air filter - replace.

Dirty throttle body and idle/air control motor - Can of Carb. cleaner sprayed into throttle body and idle/air hole while engine is running.

If engine is also running rough check:
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-Compression for bad valve.

Jun 25, 2010 | 1999 Oldsmobile Alero

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When startn car engine cold idels high to low ,up

sounds like the throttle position sensor, I think that is the one that makes it idel rough

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I am having stalling problems with my engine

if this is a 97 you have just one belt ,this is kept tight by a tention pully ,as far as the ideling it sounds like the throttel cabel has come loose this is just a guess but this can bee check fairly simply .i would suggest geting a manuel from a local part store about $15.00 hope this helps

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its vapor locking try leaving the fuel cap a little lose!!!!

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Let our Experts solve your "when at idel rpms quikly drop and car stalls" Problem

Almost always a vacuum leak. Especially suspect is the vacuum "boss" located near the back of the engine. Make sure all those little hoses are on their nipples, and that the hoses themselves are not cracked, etc.

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