Catalytic Converters... carbed engines

[vibrating_Cake]

Yes yes i know i should really fix the engine, but funds wont allow for another 2-3months at least...

 

car failed MOT on emmissions, (this time its less than double out)

i know, the oil stem seals are on their way out (grr)

so ive put some oil treatment stuff in the oil which is suppost to rejuvinate the stem seals (worked on my old engine!) and ive changed the fuel from normal octane to high octane BP ultimate...

 

now, the car passed emmissions on a tester a week ago, but it'd only pass it after the car had been thrashed, then put onto the meter after being left to settle for a couple of minutes.

 

then it passed emmissions easy...

 

so... engine = zetec on twin 45 webers... just been tuned and mapped but a little high on emmissions.

 

do you think it'd pass with the change in fuel, remove the air filters, and the oil treatment?

 

or.... if it doesnt, whats you're views on running a temporary cat in the exhaust system??

my friend has one from his old 106 rallye hanging around, if i whack this in the system nearish the engine, would this be enough to reduce the emmissions enough to get it thru an MOT and not really damage/clog up the cat???

 

will only be used to go down to the mot centre (2mins away) run thru the test and be removed the same night...

 

think this would be a short term solution to reduce the emmissions, im only a couple of CO and HC's over, but unwilling to mess with the carbs because ive just payed for it to be rolling roaded

or should i just ask nicely and sit there for 20minutes twiddling with a screwdriver and each mixture screw until it passes?

 

after fully screwing and unscrewing each screw and making a record of how many turns it was out so i can return it to its normal air-fuel mixture???

 

my car is a daily driver and i dont have the funds (just b4 xmas) to replace the oil stem seals and whack a new bottom end on for emmissions for mot. opinions please =)

[baz105e]

a cat should reduce your hc and co readings but imo its not the way to do it, your better off leaning the mixture up

[Fiesta Steve]

m8, just wind in the idle mixture screws 1/4 of a turn, that will do it.

 

You may try 1/2 a turn but it may not like it.

 

No need to count turns lol, just a small tweak makes a big difference.

 

This will take about 40 seconds to complete, alot easier than fooking about sticking small animals in your exhaust pipe

[petrolhead]

I agree with Steve, thats how I did it a couple of weeks ago for my MOT. 1/4 turn makes a big difference!

[Toby]

 

This will take about 40 seconds to complete, alot easier than fooking about sticking small animals in your exhaust pipe

 

Doesn't sound half as much fun though ooo eer misses