Losing power 3 - 5k

[Anonymous]

if the main cat os blocked with anything at all you don't want to be driving it or bye bye engine

The technician has said it would just affect emissions (and loss in performance) but would be safe to drive?

[kanujunkie]

if the main cat os blocked with anything at all you don't want to be driving it or bye bye engine

The technician has said it would just affect emissions (and loss in performance) but would be safe to drive?

NO, if you do you will bust the engine terminally, we have hundreds of cases of this with the precats. Even after precat cases the blocked cats have blown the new engines, Drive it and it'll die, you've been warned!

[Anonymous]

if the main cat os blocked with anything at all you don't want to be driving it or bye bye engine

The technician has said it would just affect emissions (and loss in performance) but would be safe to drive?

NO, if you do you will bust the engine terminally, we have hundreds of cases of this with the precats. Even after precat cases the blocked cats have blown the new engines, Drive it and it'll die, you've been warned!

Had to drive it back home from inchcape (or leave £850 lighter) and have now removed the 02 sensors.  I can see the cat through the hole from the left o2 sensor, but the right one is lower and i cant seem to see anything at all..going to remove the heatshield tomorrow to see if that gives me a better viewing angle.  Should i be able to see the cat with the heatshield in place?

I will remove the main cat tomorrow/weekend to see if i can see if/where it 'has broken up'.

thanks all for your help so far...

[philster_d]

I will also have a cat for sale in a few days (low mileage 02)

and my manifold with its immaculate pre cats   s:) s:)   tho we may just drill this to use for a swapout sometime.

I need to try to recoup some costs from my big turbo bonanza    s8) s8)  


Philster

[Anonymous]

There is no precat left at all in the right half of the manifold!  I imagine this is what the technician found in the pipe for the main CAT which then damaged the CAT?

The pre cat on the left is also breaking down, so im planning on taking the manifold off to remove the remaining parts of the precats and then replace the main CAT.

Could this still have caused any damage to the engine, or is it just the blockage/damage to the main CAT thats likely to be causing the performance issues?

Thanks

Leon

[markiii]

it's possible you might get away with just doing what you are proposing, it's also possible that precat material has been sucked back in and is already causing damage.

To be honest you have no real way of knowing.

However since you sound like you have no warranty to fall back on.

my advice would be to do what you suggested and see what happens.

you have nothing to loose and theres a good chance you will get away with it.

[Anonymous]

 s:shock: :shock: s:shock:  

If the left one is breaking down it may well have caused damage to the engine!

[loadswine]

If the car hasn't been driven too far or too fast, then it's just possible that gutting now will save too much pain. If a bit has been sucked in, oil consumption might increase due to a bit of scoring, but it may allow a bit of time to drive the car, monitor the health of the engine and, if necessary plan an eventual rebuild or replacement.

[Anonymous]

it's possible you might get away with just doing what you are proposing, it's also possible that precat material has been sucked back in and is already causing damage.

To be honest you have no real way of knowing.

However since you sound like you have no warranty to fall back on.

my advice would be to do what you suggested and see what happens.

you have nothing to loose and theres a good chance you will get away with it.

Thanks, thats what i thought. Regardless of whether the engine has issues in the future the cat work still needs doing, so fingers crossed it might be ok!

[Tem]

If the car hasn't been driven too far or too fast, then it's just possible that gutting now will save too much pain. If a bit has been sucked in, oil consumption might increase due to a bit of scoring, but it may allow a bit of time to drive the car, monitor the health of the engine and, if necessary plan an eventual rebuild or replacement.

Actually the valve overlap is worst when you're driving nicely at partial throttle and that's also when there's not much flow, so that's when the dust gets sucked back in the engine.  s:? :? s:?  I doubt you'd get anything in the engine at full throttle..

[Anonymous]

The remaining precat has now been removed, also took the opportunity to paint the heatshield, im waiting for the replacement cat (from Adam) which will hopefully be here tomorrow.

Need to pop to Toyota to pick up the gasket set and will spend most of tomorrow putting it all back together !!

I find it quite shocking that I explicitly asked the Toyota dealer whether the pre-cats were ok, and they said yes, to find that one was completely missing!  

Hopefully all will be ok once re-assembled.

Thanks

[Tem]

I find it quite shocking that I explicitly asked the Toyota dealer whether the pre-cats were ok, and they said yes, to find that one was completely missing!

It was the same over here...I asked them if they changed the main cat and they said they did. Later I found out they didn't and they confessed that they didn't.  s:x :x s:x

[loadswine]

Actually the valve overlap is worst when you're driving nicely at partial throttle and that's also when there's not much flow, so that's when the dust gets sucked back in the engine.  s:? :? s:?  I doubt you'd get anything in the engine at full throttle..

Didn't know the details on the overlap stuff Tem, was trying to apply logic only. If my car was a bit off, the normal reaction is to nurse it along, but with more knowledge , that perhaps isn't the case.
Don't think it would rev too freely anyway from earlier description, but I hope not too much damage has been caused.