Mechanics

DOESN'T COLD START

2005 Buick Terraza

Engine Performance problem
2005 Buick Terraza 6 cyl Front Wheel Drive Automatic 106K miles

The van when starting it up doesn't start without giving it gas. Without giving it gas while trying to start, the engine turns over, starts, then cuts right off.

But when starting and giving the engine gas, the van starts right up, but has a rough RPM idle for a bit. After let'n it run for some time, the van has no problem. This issue has existed for I'd say a little over 6-months.

In looking up the possible parts that might be causing this issue, this van doesn't have a Fuel Pressure Regulator listed.

2-Car Pro's help once again. What are the top possible issues that cause this.

OHIO28.
Avatar
Ohio28
October 19, 2010.




Hi Ohio28,

Here are possible causes for hard starting.


http://www.2carpros.com/forum/automotive_pictures/192750_HardStart01a_1.jpg



http://www.2carpros.com/forum/automotive_pictures/192750_HardStart01b_1.jpg



http://www.2carpros.com/forum/automotive_pictures/192750_HardStart01c_1.jpg


KHLow2008
Oct 19, 2010.
Again thank you. I will walk down the list to find the possible cause of this issue. Will def let you know what I come up with

OHIO28.

Tiny
Ohio28
Oct 19, 2010.
Ok, how do you test the current Mass Air Flow sensor? What are the steps and do you also have them in PDF format?

Again thanks much KEN.

OHIO28.

Tiny
Ohio28
Oct 19, 2010.
I will send the file to you. Hope they are helpful.

KHLow2008
Oct 19, 2010.
Thank you again and I have downloaded the helpful information and preformed the checks. But what I would like to add was I pulled the MAF Sensor and cleaned it with some Gummount Carb Cleaner as if I were spraying the jet in a carb (Like 1/2 a can). The problem has gone away. The car cold starts, maintains a consistent idle, and even seems to run better.

Thanks again.

OHIO28. Browns did the Saints bad today.
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Tiny
Ohio28
Oct 24, 2010.
Glad to know you have fixed the problem.

Yes, a dirty MAF can cause inaccurate signals resultng in starting and running problems.

Thank you for using 2carpros and have a nice day.

KHLow2008
Oct 25, 2010.

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