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This is most likely a problem with a clogged catalytic convertor
When it starts to go bad this is how it will act
I believe the problem is the cat
You can pull the O2 sensor in front of the cat if it will get better and fire than this is the problem
I don't agree with that......the car runs fine when running. if it were clogged it would have poor performance.
No it only happens when it gets hot
I deal with so many of these
Why would I be on here to lie and mislead you
i didn't imply you are lying.........
I am just saying I have no reason to give you inaccurate info
What happens is they will start melting then when cold it doesnt have an affect but when they get hot it will shit down
So cooling it off will allow it to run
So it will get worse
I just don't feel that is the problem based on the performance..
All you have to do is when it will not start pull an Oxygen sensor if it starts than that is the problem for sure
but I will try the O2 sensor....
Give that a try. If it doesnt work just let me know.
But I believe you have replaced the items in question with the fuel system and this is the issue
the problem with that is it does it only periodically and to be able to pull the sensor wire when it does may not be possible...
The reason why you have to remove the sensor is to allow flow from the exhaust
This is how it normally will start then it will get worse and start doing it more until it will only run cold only
I have tried disconnecting the sensor wire but there is no change. the owner of the car now tells me that it doesn't start at times when the engine has cooled while at work and she comes out to start it and it will not start. she says usually in 15 minutes it will start. so it is not just when the engine is hot as I was 1st led to believe. any other thoughts with this new info?
You have to pull the plug
Disconneting the connector will not do anything
what plug are we talking about?
The oxygen sensor has to be removed
so you still feel this is the converter being plugged even when it won't start cold?
If its getting worde
When the problem is happening
Check fuel pressure and spark
You need to do the basics
If the pressure is not within spec and there is spark then it can be a filter or pump
If there is no spark then it can be the coils
I have done that but it will only do what it is doing periodically ......... it otherwise tests out fine with spark & fuel delivery....
any chance of an ignition switch being bad.....??
does it always turn over
If its getting spark and fuel but not starting then check injector pulse
If all of those are there then it has to be a issue with burning the fuel
the problem is that it is hard to get it to fail in order to do testing while exhibiting the no start condition.
I am not sure without something to go off
But I know the cat can do this to the vehicle when its failing
so if I pull the sensor out and run the vehicle it should start ok at all times?
Yes. It should start ok
But still be a bit hard to start but this will give some relief
I guess we will try that
Ok let me know what happens.