Question about Pontiac Sunfire

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2002 pontiac sunfire hard to start

Car starts hard holding gas pedal to the floor helps problem is worse when car is warm

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You might want to try this take your throttle body out and give it a good cleaning with TB cleaner try to clear all black stuff out of it make sure you pay close attention to how is everything on this might have TB positioning sensor is important that this goes in the same way you can also go online find HOW TO CLEAN THROTTLE BODY good luck

Posted on Apr 02, 2014

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2001 sunfire start good cold but not when engine is hot


It sounds like you have a "flooding" problem, where you are getting too much fuel on the warm start. It takes more fuel to start a cold engine than a warm one. By holding the pedal the pedal to the floor, you are telling the computer to do a "clear flood" operation, and that lets you start the car. The culprit is probably the Coolant Temperature Sensor. If this is faulty, it will tell the computer that that the coolant (thus the engine) is much cooler than it really is. This results in the engine flooding when warm. It may also run rough at idle after warm start since it is still getting too much fuel. You will also notice a massive loss of fuel economy. Replace the coolant temperature sensor.

Jan 03, 2014 | Cars & Trucks

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2001 pontiac sunfire hard cold start


Could be a faulty idle air control valve. The computer controls idle speed by how much air gets into the intake thru the valve.
I am assuming the check engine light is not on.

Dec 19, 2012 | 2001 Pontiac Sunfire

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2000 pontiac sunfire starts only when gas pedal is held to floor, idles rough and white smoke comming to exhaust changed IAC valve..no change


If you have excessive white smoke coming from the vehicles exhaust, it sounds like your headgasket is failing. Especially having a rough idle too. Check your coolant level, does your exhaust smoke smell sweet, like Antifreeze? If so, the gasket has blown. Hope this helps...

Mar 12, 2011 | 2000 Pontiac Sunfire

2 Answers

Hard to start after being warm


is the coolant temperature sensor ok?

does it start if you hold your accelerator pedal all the way to the floor when starting?

Apr 23, 2010 | 1994 Chevrolet S-10 Blazer

1 Answer

It takes a few seconds with the gas floored to get it going. once it is warm it starts fine. I did smell a faint gas smell a week ago. it has 50k miles on it. wondering what it is and what it should cost


Possibly a leaking fuel injector(s). When you floor the gas pedal when cranking it puts the computer into clear flood mode which shuts off the injectors.

Mar 07, 2009 | 2005 Pontiac Sunfire

1 Answer

Ran out of gas now sometimes it's hard to start,have to hold gas pedal to floor


change the fuel filter. when gas gets low in the tank like that it starts to pull up trash from the bottom of the tank

Nov 09, 2008 | 1995 Pontiac Sunfire

2 Answers

Clutch


believe it or not, the floormat on my 2000 Sunfire will sometimes slip forward and hold the clutch pedal down against the floor. It truly feels like a mechanical problem, but simply pull the floormat away and the pedal pops right back up!

Jun 29, 2008 | 2004 Pontiac Sunfire

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