Skoda Fabia MK2 exhaust manifold red glow....??? is that normal

[sepulchrave]

That's not 900 degrees because you're looking at it in the dark, look in daylight!

[ionutss02]

it is based on what vcds says. made me smile

[sepulchrave]

43 minutes ago, ionutss02 said:

it is based on what vcds says. made me smile

 

VCDS doesn't have a clue, there's no thermocouple fitted to that petrol engine.

[ionutss02]

ok so lets say that vcds is not correct. i ve also check the temp with laser thermometer and temps are like the ones in vcds..

[Breezy_Pete]

The lambda sensor can give temperature info, via its PTC heater whose resistance changes.

Definitely not normal to see it that hot.

[ionutss02]

Any advice what to check?

[sepulchrave]

1 hour ago, ionutss02 said:

Any advice what to check?

 

The only thing to check is that the exhaust valves are sealing properly for which a leak down test is needed.

[ionutss02]

They are sealing properly, its the 2nd time ive tried it.

[Breezy_Pete]

Check the chain timing by fitting crank and cam locking devices simultaneously. 

[ionutss02]

Thank you, gonna try tommorow. ive checked it but first the crank and then the camshaft and vice-versa. 

[ionutss02]

On 18/02/2024 at 23:28, Breezy_Pete said:

Check the chain timing by fitting crank and cam locking devices simultaneously. 

goes in smooth 

[Breezy_Pete]

I really don't know then, but if you do find out, please come back and update the thread, unlike the previous guy who said he'd solved his.

 👍

[ionutss02]

this car really pi**ed me off. don’t know what the f to check or to do. it run perfect but still makes this ****

[ionutss02]

ive seen that i m not the only one with this problem but still anyone doesnt figure out what is it

[ionutss02]

cylinder 1 and 2. something îs really different

[xman]

It suggests cylinder 2 (the lighter) is running leaner than cylinder 1, not dramatically so.

 

Is the EML or EPC light on? Has the car been scanned for error codes?

 

Check the brake servo vacuum line is intact, no splits at every joint, or hanging off the inlet manifold, allowing air to be drawn in.

 

Over fuelling causes the cat to run really hot. So may be a faulty injector leaking.

Edited 21 February by xman

[ionutss02]

hello and thanks for reply. No Eml or epc light on, only stored in memory something about catalytic converter, gonna post to see exactly what is said. the cat box is now empty.

 

gonna check for what you said, what is weird is that the car runs on lpg and petrol with different injectors and on both fuels it does exactly the same.

[xman]

I didn't know this car had been converted to run on lpg.

 

I'd suggest that there's a lot here that is beyond the scope of most members, certainly me.

 

Only thing I can think is lpg requires completely different ignition timing to petrol and maybe there in lies potential problems.

Edited 21 February by xman