Just compression tested my tt and got average of 133psi on 5 cylinders got 50psi on cylinder 6, is 133 good for one of these engines? Whats the most likely cause for 6 to be less than half of the others?

Mmmm, depending on mileage, I think you should be looking for 160psi plus.

As for no' 6? I believe this is very vulnerable due to overheating and could be quite serious.

However, having said that, what conditions were you testing at? ie engine temp' etc.

Mileage shows 112 not sure if mikes or kilometers as its an import, test conditions were all spark plugs removed, injectors left in, engine cold as it doesnt currently run so was testing to see if compression could be a cause for non running

Mileage shows 112 not sure if mikes or kilometers as its an import, test conditions were all spark plugs removed, injectors left in, engine cold as it doesnt currently run so was testing to see if compression could be a cause for non running

 

 

A warm engine is an important criterion when doing a compression test, all of those figures will rise when warm even the lowest number six cylinder which is tragically low.

 

Jeff

Unable to do a warm test as it wont run this was part of diagnosis on the problem of non starting

? Why u starting with this?

A warm engine is an important criterion when doing a compression test, all of those figures will rise when warm even the lowest number six cylinder which is tragically low.

 

Jeff

 

 

So should it be tested warm then Jeff?

 

I've seen the figure which states a TT engine is perfect at 175psi, but wasn't sure if that was hot or cold.

U said it is a none runner!

Why start with a compression test ?

Ive not started with it, ive check spark fuel cas got coolant sensors on order detonation sensor needing rewiring, compression test was only done as i have the kit to do it so it was just done to tick it off the list of tests i can do to help towards the finding the problem

Does the car have an immobiliser?

Not that i know of as it started with a new key