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Engine starts and stays at high idle - 5.5 HP GX160 Engine

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At start up engine runs at very high ilde and wil not kick down to regular idle. Just replaced throttle position sensor.


Check coolant temp sensor untit. It tells the computer what the coolant temp is at and adjusts the cold start accordingly. If its bad it'll stay on high idle until it warns up.

Mar 14, 2016 | Cars & Trucks

1 Answer

Fast idle when starting cold engine


Should idle fast when cold for around 60 seconds. Does it stay idling high ?

Oct 19, 2015 | Cars & Trucks

2 Answers

Why does my miller bobcat welder generator not stay at an idle when swithed to low idle, insted it goes back and forth to high then to low idle?


The unit may need recalibrating the idle/run setting. Instructions found in manual at 8-6 (subaru engine) and 9-5 (kohler). Idle speed around 2200rpm. Simple screw adjustment. PDF manual here :- http://www.millerwelds.com/om/o4434l_mil.pdf

Aug 02, 2014 | Bobcat Miller 225 Welder Generator 907209...

1 Answer

High idle gmc 1988 s15 poor fuel economy no check engine light


Change the temperature control sensor to the front if the engine near radiator
1 start the truck let it run till you think it is at normal operating temperature
2 unplug the temp sensor if the idle changes then the sensor is bad

Feb 08, 2014 | 1988 GMC S-15

1 Answer

My 1991 Buick Regal (3.1 engine) use to start a high RPMs and then slowly, as the engine warms up, the RPMs would come down to about 800, which is the normal. However a few weeks ago, it started to start...


Hi,
You need to get your engine coolant thermistor checked and tested. This is what tells the ECM when the engine temperature is at normal working temperature and turns the idle down.
But when the idle won't come down from cold to warm this is usually the main fault.
Hope this helps.
Thanks
Jason

Jan 28, 2011 | 1991 Buick Regal

1 Answer

My Golf Mk4 TDI's lights have started pulsing with the sound of the engine idling rough however rev counter stays pretty steady. putting a multimeter across the battery whilst ignition is off gives a...


voltage sounds kinda high for while its running. the voltage regulator in the alternator sounds like it is bad. i would replace the alternator.

Feb 03, 2010 | 2000 Volkswagen Golf

1 Answer

1992 ford f150 xlt- when first started idle jumps from very low to very high repeatedly until warm. then idle is high


try un-plugging the IAC motor,then start it,if it idles low and stays there then replace the IAC motor----if no change then you may have a knock in the engine and the knock sensor is telling the computer to change the timing to compensate for spark knock due to low grade fuel,so it advances the timing back and forth due to too high of rpm then too low and the computer doesnt know how to smoothen it out that fast,but eventually does.The check engine light would usually come on in this case

Jan 23, 2010 | Ford F-150 Cars & Trucks

2 Answers

Engine idles excesivly high after carb was rebuilt.


You need a new choke pull off. They are around $30 dollars.

Dec 09, 2009 | Ford F-250 Cars & Trucks

1 Answer

I have a 1994 gs300 and my engine light stays on. It idles a little high on a cold start for about 1 minute then its fine but the light stays on. Does the erg system have a filter that could be causing...


High idle is expected because of settings the coolant and air temp sensors set up with the computer. "cold start choke" The light coming on can be contributed to a rich fuel mixture that lasts too long. The 02 sensor picks that up and triggers the light. So, Your engine coolant sensor may well be the problem.

Sep 28, 2009 | 1994 Lexus GS 300

2 Answers

High fast idle at start up.


On most newer cars there is a fast idle motor controlled by the computer that will hold the fast idle till the engine reaches a preset temp in the computer then the engine should drop down to the set idle according to specs for that car. If the oil pressure continues to stay low after the idle goes down you may need to replace the oil pressure sending unit or if worse case the oil pump.

Nov 18, 2008 | 2003 Hyundai Tiburon

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