Question about 1998 Ford Ranger SuperCab

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2001 Mazda B2500 Rough Idle

Runs fine, but the Idle is real rough and the truck will turn off when Cold unless I give it gas. No Fuel issues (i.e. losing or smelling), Check Engine light is on. 105k miles on vehicle. I was able to "run" it out the first time, but the second time on, the problem remains.

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Check for Vacuum hose(s) off at the black intake tube and at the vacuum tee on the left side rear on the upper intake manifold.

Posted on Oct 07, 2009

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88 f150 351w forever to start and when it does it runs real rough until I hold gas down for a minute then idle rough but will start right back up unless it sits awhile doesnt want to start back up


There are several possibilities for this problem. A "cold start" sequence is suppose to activate based on water temperature and the signal from the water temperature sensor. This makes the fuel rich and adjusts timing to make the engine run better when cold. It works like a choke only it is electronic.

There may be 2 sensors with one making the dash gauges work and the other doing the engine controls. If not 2, then 1 sensor would do the whole job.

Another possibility is an air leak in the fuel system which makes the system bleed dry overnight. It is far less common on gas engines but happens a lot on diesels.

Some earlier Ford engines from 1984 to I don't know when they stopped on trucks, would use a step-up solenoid on the accelerator bracket that worked off water temperature. Sometimes a bad water thermostat would make the temperature controls malfunction the other way (High idle, clicking, low idle) that would stall and engine as the temperature vary.

Feb 27, 2015 | 1988 Ford F 150

1 Answer

My 1999 troy lee b2500 will not ital


If it's really rough, check for dirty or stuck EGR. It just slightly rough and also you have to depress gas pedal a bit to start, check IAC (idle air motor). If gas mileage is also bad check coolant temp sensor.

Dec 29, 2014 | 1999 Mazda B-Series

2 Answers

Rough idle after engine is warm


Dirty air filter, dirty throttle body...try 2 bottles of gas line fuel injector cleaner...has your car been parked for awhile? Heet gas additive will work on any low gas tank sludge that you may have. Hope this helps.

Mar 24, 2014 | 1999 Mazda 626

1 Answer

My Chevy 2500, 2001 runs rough when it cold outside


It can be issue with low fuel pressure,the fuel pump is getting old both needs to be checked.Also get the IAC valve checked.
Go through the related help links with similar problem,it may help:---
Click the links below:---
Engine Idles Rough and Dies? http://whatisbyme.blogspot.in/2012/05/1994-lexus-es300-engine-idles-rough-and.html

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van idles rough? http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html

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runs lean and idles rough? http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html

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Car still runs Rough after tune up?

http://howtobyme.blogspot.com/2011/12/car-still-runs-rough-after-tune-up.html

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2006 kia rio runs rough http://technoanswers.blogspot.com/2012/10/2006-kia-rio-runs-rough.html

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Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed? http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

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Rough idle, staling and Erratic shifting? http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html

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These details will help.
Thanks.

Nov 06, 2012 | Cars & Trucks

1 Answer

I have a 19999 Mazda B2500. The idle is very rough and when you step on the gas pedal the engine surges between idle and about 1500 RPM. It can best be described as acting much the same as the governo


it sounds like a lambda sensor issue, the lambda sensor is located on the exhaust manifold, it controls the emisions, it also controls the air/fuel mixture to control the emisions, if it is faulty it could cause the engine to surge like you describe

Aug 02, 2012 | Mazda Cars & Trucks

1 Answer

My Mazda starts rough and idles real rough with black smoke and smell of gas after warm runs great


Dear Smoker.......Sounds to a trained ear that this little guy is gonna need a fuel pressure regulator. It is basically dumping an excessive amount of fuel with the black smoke and all and once it gets warmed up it runs a little better cause it's out of the closed loop cycle. Check the fuel pressure regulator...pull the vacuum line off of it and if you can smell gas or see gas drippin out....that regulator is junk!!! The pressure regulator is on the fuel rail on top of the motor by the way...this should cure your woes.....if not..please get back to me... I HOPE I COULD HELP!!!

Nov 16, 2009 | 2001 Mazda Tribute

4 Answers

My '01 Tribute V6 3.0 has a rough idle at a cold start up, once the engine is warmed up and I have been driving for 5-10 minutes it clears up, but until then it will go dead if I do not give it gas at...


Don't waste your time. Have the intake manifold gaskets (upper and lower) replaced. Check all vacuum lines for leaks. Clamp all vacuum hose connections.
Do NOT replace any sensors unless the computer codes indicate.
THIS WILL FIX YOUR PROBLEM!

Oct 09, 2009 | 2001 Mazda Tribute

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