stuttering during cold start

[squall458]

Hey guys. This is my first winter with my 02 P5. I have started to notice that it stutters a bit during a cold start. Is it the temp sensor or just the plugs? I noticed that the temp stays at 0 for at least 5-10 minutes. I thought nothing of it until now.

 

[Riken]

Put some lucas in your gas tank,

 

[Speedy3]

Do yourself a favor. Pull all the spark plugs (yes, remove the TMIC). Check for cracks in the ceramic. I had the same symptoms for the first 5K miles and after 3 dealer visits, they could not find the problem because they weren't authorized to pull the TMIC to check all the plugs. it would stutter / buck at low RPMs and until the engine was hot as it gets, then it would go away. It was the plugs. At higher RMPS and higher temps, the flash point of the fuel drops and the spark doesn't have to be as strong.

I had 2 cracked spark plugs. I found the problem myself, replaced the spark plugs and it was fixed. They told me that they were either defective or they were dropped on the floor before instal at the factory.

Check the plugs. I have a thread here with pictures.

http://www.mazdas247.com/forum/showthread.php?t=123656333&highlight=stuttering

 

[NCZ13]

Do yourself a favor. Pull all the spark plugs (yes, remove the TMIC). Check for cracks in the ceramic. I had the same symptoms for the first 5K miles and after 3 dealer visits, they could not find the problem because they weren't authorized to pull the TMIC to check all the plugs. it would stutter / buck at low RPMs and until the engine was hot as it gets, then it would go away. It was the plugs. At higher RMPS and higher temps, the flash point of the fuel drops and the spark doesn't have to be as strong.

I had 2 cracked spark plugs. I found the problem myself, replaced the spark plugs and it was fixed. They told me that they were either defective or they were dropped on the floor before instal at the factory.

Check the plugs. I have a thread here with pictures.

http://www.mazdas247.com/forum/showthread.php?t=123656333&highlight=stuttering

i like the enthusiasm... but its a p5... lol

anyways yeah, check your plugs. i had a bad misfirey idle and plugs made it all better.

 

[Speedy3]

i like the enthusiasm... but its a p5... lol

anyways yeah, check your plugs. i had a bad misfirey idle and plugs made it all better.

Hehe, oops. I guess I missed the P5. I always assume everyone is talking Speed 3 on this forum.

I also read that a throttle body ground will fix issues similar to his problem.

 

[NCZ13]

Hehe, oops. I guess I missed the P5. I always assume everyone is talking Speed 3 on this forum.

I also read that a throttle body ground will fix issues similar to his problem.

if its ETC (electronically controlled throttle) the p5 doesnt have an electronic throttle body. grounding it would just give you another ground point in the engine bay and nothing more.

 

[squall458]

Changed plugs with the recommned NGK ones and still stuttering. Its not annoying but it stutters more with colder temps and this is with a brand new red top optima too. Could it be the EVG valve?

 

[NCZ13]

EGR valve you mean?

it could be sticking while cold... its completly possible.

when you say it stutters what do you mean?