Hello, i have a problem with my cossy 3door. It´s been stored in my garage for 6 months due to bad winter we have suffered in Mallorca. Now with the good summer time I decided to take out the car for a ride, and I found a problem.
when the car reaches its operating temp, it begins to misfire. It seem the engine don´t accept the boost. When I press the acelerator hard, the engine starts to misfire, then I release the press and press again smoothly, and then it seems the car accept the boost, but not smoothly, it rattles all the time.
If I stop the car, and let the temp down, then the engine goes well until the temp rises, and again the engine rattles.
The engine was rebuild 2 years ago , and I have just drove 1500Km.
Everything is new, every sensor is new, I dont have any Idea of what happens.
So I need some advice of what to do
Thanks

 

bad weather in Spain? try living in england!

my first though would be the blue temprature sensor at the back of the head on the inlet mainifold side of the head -

Matt

 

Or the brown one in the inlet, i think both can cause those problems...

 

yes, that was my next suggestion

 

sure???

 

Well, it s a cossi, so it could be a lot but since those two are temp-related as your problem is, it would be worth to give it a check.

 

i think it will be the blue temp sensor - but it is always good to replace it
i think the sensor is Ł10 so it is cheap

http://cgi.ebay.co.uk/RS-Cosworth-YB...3A1%7C294%3A50

the other thing i was thinking is maybe map sensor, but this wouldnt explain why it only does it when it is hot

 

I was also thinking map sensor, as others been done, but best not assume that because they are new they work ok, best get metre out and do some measurements.
If the map is reading wrongly it will be more suceptible to weaker mixtures the warmer it is.
I would also check the fuel pressure, the air temp sensor is a little trim, the main corrective is the CTS, so have a good check on the actual received signal, and wiring etc.
tabetha

 

Sounds like a very similar fault i had on mine when i first got it.I changed the water temp sensor.

 

I wll change the blue sensor and hope to solve the problem

 

any other idea???

 

did you change the blue sensor Danrom?