The Panda Nut
Nutty about Pandas Infected by Panda virus and OPD
Had this issue with a badly fitted rear silencer. My fault. It was corrected by the garage FOC.
Mot emmisions test machine reading over 1.4 not a large leak of air into exhaust?
The highest reading I have previously seen was 1.2 caused by a 25mm diameter hole and a split , both in the middle pipe.
But I guess a smaller hole in a low pressure region(hadn't considered that) could have a similar effect .
I do hope we get some pictures so we can see for ourselves
FYI
The rear silencer (factory spec.) Is tilted forward slightly.. and has tiny (@3mm) hole as a drain
So seeing damp..or drips isnt conclusive
Is the back box peeling like an onion..?
Thats what I generally see
back box looks in good condition, pretty much no rust. the rest of the exhaust (pipe) is rusty.
I had the same issue with a new Skoda Favorit GLXIE on its first MOT it was always a little hesitant, the dealer could not find the fault and eventually gave up. I found the spring in the fuel pressure regulator to be broken at its lower part, a new spring cured the issue. Hesitation cured too, all down to low fuel pressure.
A very high mot test lambda calculated reading means massively excess oxygen in exhaust gasses
Remember the mot test co was low and a pass and the hc was low and a pass.
These readings point to the fuel air ratio in the engine being correct.
Is this observation with the car on ramps or on the ground?back box looks in good condition, pretty much no rust. the rest of the exhaust (pipe) is rusty.
Is this observation with the car on ramps or on the ground?
For clarity If your engine keeps running with tail pipe completely blocked (damp rag ,glove , potato , whatever) then the exhaust is holed somewhere.
Everyone is guessing or assuming what your car sounds like. Do you know if it sounds loud or blow? It's ok to say if you don't know and dont have any experience of blowing exhaust sounds.
Many thanks
Jack
Omg thanks Rings,In fact, CO and HC numbers were precisely ZERO in each case - too good to be true? I've never seen any zero's for HC or CO on any of my previous MoT's, so something might not be completely in order with that MoT testing kit maybe? Smells fishy I think.....
Is this observation with the car on ramps or on the ground?
For clarity If your engine keeps running with tail pipe completely blocked (damp rag ,glove , potato , whatever) then the exhaust is holed somewhere.
Everyone is guessing or assuming what your car sounds like. Do you know if it sounds loud or blow? It's ok to say if you don't know and dont have any experience of blowing exhaust sounds.
Many thanks
Jack
Coolant is filled and no air in system.
I have to note also that the issue is not there on a cold start and starts when the engine starts to get warm and the revs drop to normal idle, which at the moment is around 770 rpm.
Ok Murphy I have heard you.It's important to get a good seal on the exhaust outlet to stall an engine. Modern systems with an ECU will compensate when you try to stall an engine by upping the fuel delivery, this can be by trying to move of at low revs in second gear or by choking the exhaust. Go and try to stop another Panda that way, it's not easy!!!!!
If the mot centre did put the probe in exhaust and got those readingsThanks..
Not there when cold.. still pointing to something other than JUST the exhaust
Do you still get the MIL ?
Charlie