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1999 suburban is sluggish after engine warms to normal operating temperature

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Try some lucas fuel system cleaner.

Posted on Oct 09, 2010

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1999 Nissan quest my van takes 40 minutes to reach normal operating temperature IF I have the defrost on, this does not happen if I have heat only on


By "normal operating temperature", are you referring to the engine temp or the cabin temp? If cabin temp, the defrost selection also engages your air conditioning system which lowers the temperature and the humidity of the air blown through your heating ducts. Although, you should not have to wait 40 minutes for warm air to flow. Check your engine's coolant level to ensure that it's filled properly, and be certain that the temperature control selector is set to the warmest level possible. There are other possible malfunctions that could account for this condition, but we'll leave that alone for the present. Now, if you're talking about the engine's normal operating temperature, please disregard what I have said so far and reply back.

Oct 01, 2013 | 1999 Nissan Quest

1 Answer

Mitsubishi space wagon 1999 engine light comes on and judders untill tempreture gage warms up then run s like a dream any ideas why ?


Most likely a faulty engine temperature sensor. Sounds like it is stuck reading you engine at normal operating temp and not cold.

Aug 03, 2012 | Mitsubishi Cars & Trucks

1 Answer

1999 gmc suburban wont run when engine reaches operating temperature


you could have a bad engine coolant sensor. or if the check engine light is on get it scanned for the problem code. most auto parts stores will scan for free, if check engine light stays on.

Mar 28, 2012 | 1999 GMC Suburban

1 Answer

I have a 1999 new bettle that when i give it gas it boggs down until it warms up ,then it runs fine would that be a sensor


does the check engine light comes on? if it does get the codes and take it from there,probably your temperature sensor is not reading wright until normal operating temp. let me know thanks

Aug 05, 2010 | 1999 Volkswagen Beetle

2 Answers

1999 Honda Accord heater not blowing hot air


Sounds like a thermostat or cooling system issue. Change the fluid and the thermostat. It will do your engine good so it's money well spent.

Dec 31, 2009 | 1999 Honda Accord

2 Answers

Engine will not idle until warm. then it is just fine


This is normal, as long as the rpm's are not above 2000, this is to heat the engine to it's operating temperature quickly. Once the engine is warm, the rpm's will drop to 600-800RPM.

Dec 04, 2009 | 1999 Toyota Camry

3 Answers

Low oil pressure after engine warms.....


A 1999 Yukon DOES NOT have a vacuum advance. It is computer controlled timing. Low oil pressure is the result of some or all of the following : worn oil pump, worn cam bearings, worn crank bearings. Oil pressure also normally drops as engine warms because the viscosity of the oil changes with temperature.

Jun 22, 2009 | 1999 GMC Suburban

1 Answer

Check engine light comes on when car is warm.


could be the crank sensor breaking down when hot which will cause you to lose spark,get it hot and see if have a spark from plug lead after it does cut out and this will verify it.

Dec 18, 2008 | 1999 Hyundai Accent

1 Answer

Sluggish engine


Could be your catalytic converter. Get an Oil Change and see if they will read your codes. If it indicates misfire or exhaust problem have the converter replaced. DO Not pay 600 dollars buy an after market converter and let them weld it in. Should cost 200 -300 bucks.

Sep 07, 2008 | 1999 Chevrolet Cavalier

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