3b de-cat gas analyser Test results

[s2driveruk]

so bit of background, my 3b was registered on Aug 4th 1992, 4 days into the BETS (Basic Emissions Test) Date window meaning in theory it has to be tested as a cat equipped vehicle with specific test data from the dvla about emissions specs for the car.

I recently decatted the cat and today popped over to the place that performed the last MOT at their invite to see what it would measure minus cats and if it could legitimately pass the test.

Here's the result.....



Basically only the CO couldn't be passed, however they thought it would be possible to get that down with a proper hot car prior to the test. I havn't changed anything in advance of the test to make sure it was a 'worse case' - so oil, sparks and air filter were not new.

I'll now refresh those and we'll try again in a couple of weeks and see what results come back. Either way I doubt it will be a problem but would be nice to get green lights on all tests

Cheers
David

[S2central.net]

I've never tried it, but be interesting to see if any fuel / timing tweaks at idle and fast idle could squeeze out a pass on CO...
You aren't far off the spec there actually so I do wonder. But didn't Mihnea try to do this a long time back without success ?

I wonder is there a fuel additive or something else funky that could help swing a result. Is there a chemist in the house ?

[Jamo]

Yeah Minhea tried and couldn't get it within spec

http://www.s2forum.com/forum/showpost.php?p=60947&postcount=19

There's a thread started by MartinJS that began it all http://www.s2forum.com/forum/showthread.php?t=1290

[Rusty]

That looks the same as my car with a supposed sports cat more like shyte cat

[s2driveruk]

hmmm, now a 2nd bank of fries with an MOT pass spec would be a great win - even if allied to a bottle of something for the tank

[Rusty]

Just get an 'A' reg pricate plate, that'll confuse them

[Jamo]

Dave one thing even though your car was registered 4 days after the test should be on the date of the engine not the car as I was told by an MOT tester so you should be having the non cat test.

[s2driveruk]

on the computer the engine is listed as 3b 1990-94 and subject to closed loop test...i'm just happy the test centre knows its not a daily driver, apparently it makes a difference