Question about 1998 Pontiac Sunfire

1 Answer

Temperature guage drops in our 1998 Sunfire when acceleration occurs - any ideas why?

We have replaced the temperature sensors, and the "check engine" does not come on. It also runs a little rough. Any suggestions?

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert that has over 500 points.

  • Expert
  • 271 Answers

Need a professional diagnostic tool to check engine, it is most impossible the problem of engine.

Posted on Oct 25, 2012


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


SOURCE: 1998 Sunfire rough running (missfire) common causes?

check the coils my 98 had a crack coil that drove me nuts. If thats the problem make sure you replace both ignition coils

Posted on Jun 18, 2008

  • 116 Answers

SOURCE: 97 pontiac sunfire idles rough and wont go past 20


Posted on Dec 11, 2008

  • 4 Answers

SOURCE: 1999 Dodge Caravan running rough at idle and lack of acceleration

Here are a few things to check that aren't that exspencive to do. check you'r o2 scener and the map scencer.try tapping on the cadiletice convertor to see if can hear any rattling if there is any rattliling the cadiletice converter could be clogged and will need to be replaced.You can also have the emission control module tested to see if it working properly.

Posted on Feb 10, 2009

  • 333 Answers

SOURCE: location of the coolant temperature sensor

You will find this sensor where the fat hos comes from the radiator and conects to the engine block. It would be on the housing where the thermostat is located. If it is not there you should look for a sensor that has a wire connected to it anywhere on the engine block where a water inlet is located. I hope this helps. Don't forget to rate my answer, thanks.

Posted on Feb 13, 2009

  • 25 Answers

SOURCE: I own a 2002 Chevy Trailblazer with 4200 vortec

Do you know if the plugs were changed, a bad or broken plug will also cause rough idle and slow acceleration?

Posted on Oct 21, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Temperature guage working for the first few kilometres and when normal temperature is reached the guage drops to zero

Could be bad sensor that fails when warmed up. Try disconnecting while cold so you know you have the correct one, warm up until fails (test hooking up briefly) and once failed short sensor wire to ground to see if gauge comes up. If so, replace sensor.

Mar 01, 2016 | Cars & Trucks

1 Answer

Coolant guage reading incorrect?

It is normal for your guage to to fluckurate a bit,

Oct 25, 2012 | 1998 Honda CR-V

2 Answers

After pulling to end of my driveway in the morning " 60 ft." the heat guage pegs on Hot if I drive 2 or 3 miles it will drop back to normal in the evening when I leave work theres no problem the...

Thats odd
If your idling for 5 minutes or more it could be a stuck thermostat that later corrects itself and in rare cases could be a poor pumping water pump. To check pump disconnect heater hose and rev engine coolant should pump out as fast as a water hose. Catch in a bucket if you can and put back in radiator.
If your just starting and going it coiuld be a failing sensor so in that case I would change the sensor they are easy and usually not to expensive.

Feb 17, 2011 | 2002 Toyota Tacoma

2 Answers

My car "suffocates," when trying to accelerate.

fuel filter. and if that does not cure the problem then have the fuel pump pressure checked

Feb 05, 2011 | 1990 Chevrolet Lumina

1 Answer

1998 Kia Sportage. Temperature gauge is not working.Any ideas on what could be causing this.

If it is the only guage that doesn't work at all, i would check every sensor wire connection, then the wire itself (purhaps insulation rubbed off or melted) as these sensors use return voltage.

Jun 19, 2010 | 1998 Kia Sportage

1 Answer

Po 113 intake air temperature sensor 1 circuit high input for pontiac sunfire 1998 2.2 L

Inspect the IAT sensor and wiring. The sensor is located in the air induction tube near the air filter. I've seen these wires break at the connector.

Feb 23, 2010 | 1998 Pontiac Sunfire

2 Answers

RPM drops to zero at idling after engine accelerates when warm

This may been an ignition module or a MAF sensor, this car may need to be diagnosed using a OBD I computer code reader to accurately diagnose the problem.

Aug 06, 2009 | 1998 Mitsubishi Eclipse

1 Answer

Coolant wiring

Ensure you are checking the right sensor.
The coolant level sensor is usually located in the coolant resevoir. It generally performs a hi/lo monitor switch function.
The coolant temperature sensor is usually located on the motor (cylinder head or thereabouts). It is a variable resistor dependant on coolant temperature.
As a quick check to identify the sensor, with engine running, short the sensor to ground. If it's the temp gauge sensor the gauge will go max high. Open circuit connection = temp low.

Aug 01, 2009 | 1998 Pontiac Sunfire

2 Answers

Ambient temp guage problems

The temperature sensor is located in front of the radiator on the passenger side. Replacements cost approx $25.00.

Jul 23, 2008 | 2000 Chevrolet Impala

Not finding what you are looking for?
1998 Pontiac Sunfire Logo

115 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts


Level 3 Expert

76070 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8266 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides