Exhaust Emissions

James_N · Mar 11th, 2006, 18:23

Hi

Right, Exhaust emmisions. I dont think my 740 2.3 will pass the emissions for the MOT. If you stand behind the exhaust, it nearly blows you over!

So what needs doing? does it need a new exhaust system or just the engine tuning?

I did take it into the garage the other week for the exhaust and all they said it was, was that there was a slight leak and it needed clamping. It only took them two mins to fix, and the car ran and idled MUCH better after this, but i still know it wont pass the emissions. So what should be done?

the great one · Mar 11th, 2006, 18:52

the co is adjustable on your vehicle but if its miles out and wont adjust could have an air leak or faulty maf unit

Citizen.Agfa · Mar 11th, 2006, 20:50

Quote:

Originally Posted by James_N

Hi

Right, Exhaust emmisions. I dont think my 740 2.3 will pass the emissions for the MOT. If you stand behind the exhaust, it nearly blows you over!

So what needs doing? does it need a new exhaust system or just the engine tuning?

I did take it into the garage the other week for the exhaust and all they said it was, was that there was a slight leak and it needed clamping. It only took them two mins to fix, and the car ran and idled MUCH better after this, but i still know it wont pass the emissions. So what should be done?

Nothing CAN be done until you get the actual emissions figure so you know which way to adjust.

All the best, Nick.

James_N · Mar 12th, 2006, 01:57

right, thanks for that. I'll get the car put through a Pre-MOT at the local garage

Thanks
James

LankyTim · Mar 12th, 2006, 19:52

Stick some redex in the tank, and give it an italian tune-up (drive round at 30 mph in second gear) this can help to blow any crap out.

James_N · Mar 13th, 2006, 00:18

Quote:

Originally Posted by LankyTim

Stick some redex in the tank, and give it an italian tune-up (drive round at 30 mph in second gear) this can help to blow any crap out.

Ah dont worry, it got thrashed plenty today, decieded to take it out and blow all the cobwebs out the engine

octo0072000 · Mar 13th, 2006, 22:56

change air filter or take it out for test but make sure there is no crud in filter box and pipes first

James_N · Mar 14th, 2006, 13:02

Quote:

Originally Posted by octo0072000

change air filter or take it out for test but make sure there is no crud in filter box and pipes first

changed that only a few weeks ago when it underwent a service

Mar 16th, 2006, 19:54

I had a similar issue with my 1991 740 a few years back. The key I learned: make sure they run it warm - I did 20-30km before the test and arrived just on time for my appointment. Right onto the test and no delays. Also, I noticed they weren't reving it appropriately - so hang around, and keep your eyes open.

I did, ultimately, have to get my catalytic converted replaced, and it's passed easily since then, but I did manage to nurse it through a few years of testing...

Kim

James_N · Mar 16th, 2006, 20:11

I'd ideally like to get this sorted though as i intend to keep the car for a long time and it really does nearly blow you over when starting it in the morning.

Im sure its just a case of a tune up or second hand exhaust needed but im not sure.

Mar 11th, 2006, 18:23	#1
James_N VOC Member Last Online: Jan 4th, 2024 11:32 Join Date: Jan 2006 Location: Stafford View Photos By: James_N	Exhaust Emissions Hi Right, Exhaust emmisions. I dont think my 740 2.3 will pass the emissions for the MOT. If you stand behind the exhaust, it nearly blows you over! So what needs doing? does it need a new exhaust system or just the engine tuning? I did take it into the garage the other week for the exhaust and all they said it was, was that there was a slight leak and it needed clamping. It only took them two mins to fix, and the car ran and idled MUCH better after this, but i still know it wont pass the emissions. So what should be done?

Mar 13th, 2006, 22:56	#7
octo0072000 Member Last Online: Feb 21st, 2018 21:38 Join Date: Mar 2006 Location: Doncaster	re &40 change air filter or take it out for test but make sure there is no crud in filter box and pipes first

Mar 11th, 2006, 18:52	#2
the great one Senior Member Last Online: Jul 5th, 2009 19:50 Join Date: Jan 2006 Location: south	the co is adjustable on your vehicle but if its miles out and wont adjust could have an air leak or faulty maf unit

Mar 12th, 2006, 01:57	#4
James_N VOC Member Last Online: Jan 4th, 2024 11:32 Join Date: Jan 2006 Location: Stafford View Photos By: James_N	right, thanks for that. I'll get the car put through a Pre-MOT at the local garage Thanks James

Mar 12th, 2006, 19:52	#5
LankyTim Missing the point Last Online: Feb 5th, 2023 23:12 Join Date: Nov 2001 Location: Stoke-On-Trent View Photos By: LankyTim	Stick some redex in the tank, and give it an italian tune-up (drive round at 30 mph in second gear) this can help to blow any crap out.

Mar 16th, 2006, 19:54	#9
Kim G Guest Location:	I had a similar issue with my 1991 740 a few years back. The key I learned: make sure they run it warm - I did 20-30km before the test and arrived just on time for my appointment. Right onto the test and no delays. Also, I noticed they weren't reving it appropriately - so hang around, and keep your eyes open. I did, ultimately, have to get my catalytic converted replaced, and it's passed easily since then, but I did manage to nurse it through a few years of testing... Kim

Mar 16th, 2006, 20:11	#10
James_N VOC Member Last Online: Jan 4th, 2024 11:32 Join Date: Jan 2006 Location: Stafford View Photos By: James_N	I'd ideally like to get this sorted though as i intend to keep the car for a long time and it really does nearly blow you over when starting it in the morning. Im sure its just a case of a tune up or second hand exhaust needed but im not sure.

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