2001 250 GT problem

[the-oz-slider]

2001 250 GT problem

Hi All, If I have this in the wrong category, please shift it across as necessary

my 2001 250GT has a miss which I presume is a spark plug issue as I don't think they have been changed for a very long time - my daughter previously owned the car....

it has 180,000 km and is in fantastic condition except for the miss, which is worse on start up but seems to improve slightly once it warms up.

that would normally suggest a sensor problem, rather than spark plugs, but my daughter had the vehicle tested by a service shop and they say the codes suggest bad spark plugs.

i will be in Auckland late November from my home in Canada, and i intend to start by replacing the plugs and then go forward from there. 

My questions are as follows:

1. What is the preferred sparkplug for this car?

2. From what I can see it needs a special long sleeve plug wrench. Are they readily available in NZ or should I buy one online?

3. Any other hints or tips that may help? I assume it will be a tough job to get the back three plugs out.

thanks

al Gill

Edmonton Canada

 

[sonicii]

Use NGK plugs, here is the reference

http://ngk-sparkplugs.com/my34-vq25dd-neodi-c-180_5264_6317_6402_6403.html

Bad plugs will struggle to ignite a rich fuel mix, which is what you have with a cold engine, so they certainly could be the cause.

As for accessing the plug, I was able to replace all the plugs on my 350GT with only removing plastic parts (intake ducting, etc), normal spark plug socket with an 3/8 socket extension did the job fine, there was no need for a special wrench.  I wouldn't expect the 250GT to be that different, but I could be wrong.

What do you mean the 'back 3'?  there are only 2 back plugs, 2 middle and 2 front..

Just hope you don't find oil in any of the spark plug tubes, as that is failed rocker cover gasket, which isn't replaceable without the entire rocker cover.