AFRb fault looked on De-catted S6 De-CAT chip needed?

[KenInOntario]

I cannot lock down why I am getting a logged AFRb fault no matter what I do.

Everything is balanced etc, only thing I can think of its that she is de-catted.

I will take her for a run later & log the results, which may help.

Would the De-Cat EPROM perhaps help with this?

Has anyone installed this in their car?

When they did what was involved? I am not in the UK so cannot bring my car in, but am handy enough with most jobs.

[mk1fan]

Pretty easy to find out if the cats have been removed. I assumed you knew in the other thread. Undo one of the cats and look in.

[duff-man]

Lambda sensors are before the cats so can’t see them causing the issue.

Any air leaks anywhere? Throttle bodies being the main area to look at and exhaust manifold “gaskets” (rtv sealant)

What do your throttle percentages, adaptives & lambda voltages look like?

[KenInOntario]

duff-man said:

Lambda sensors are before the cats so can’t see them causing the issue.

Any air leaks anywhere? Throttle bodies being the main area to look at and exhaust manifold “gaskets” (rtv sealant)

What do your throttle percentages, adaptives & lambda voltages look like?

I am going to get a "Smoke test" on the exhaust to rule out any leaks I may have missed, or can't see.

There is always a chance there could be a leak upstream

[KenInOntario]

I may have jumped the gun a little.

After I replaced the Lambdas I forgot to reset the Adaptives. I did it before a long drive, and today I logged everything.

I also have a log file. Which I can post a link too if someone better than I can analyze

No faults came up today but it was only a 20min drive in mixed conditions

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[KenInOntario]

[s6boy]

That's a good result. And a good lesson to ask 'what's changed' when reading through a thread
Engine looks well set up to me hope someone cleverer than what I are can confirm!
Why did you need to change the lambdas?

[mk1fan]

May not want to mess with something that is running fine

Idle seems low or am I mixing up my idle speeds between different TVRs

[KenInOntario]

s6boy said:

That's a good result. And a good lesson to ask 'what's changed' when reading through a thread
Engine looks well set up to me hope someone cleverer than what I are can confirm!
Why did you need to change the lambdas?

Th original lambdas got damaged after the engine was rebuilt, Cylinders 4/6 not swap on the coil Ouch

I bought some replacements, the land rover ones. But I always got errors.

So I bought the TVR spec ones, as many threads indicated that the Land Rover ones can cause issues.

[EvoOlli]

You should get the newer MBETool from www.wiechens.de/mbetool/mbetool.zip.
There was a massive bug in the old version...look in the upper right corner behind Cyl .... :-)

[mk1fan]

My wedge is a 7-cylinder