high co readings at MOT test.
Posted: Wed Sep 04, 2013 5:04 pm
Hi Everyone. Ive just joined the corsa forum, and have a problem that i hope someone can help with.
I bought a 1997 corsa 1.4( ecotec engine) gls 5 door manual last week, cheap, for my daughter in law to use to get to work as her little nissan micra just gave up the ghost.
The fella i got the car from, had just taxed it for six months, and had taken it in for a new MOT, but it failed on a couple of silly things( wiper blade and brake light) plus it failed on emissions test. Specifically, the CO levels were failing on fast idle.
He replaced the cat, the lambda sensor and took it back in, and again it failed the emissions on the same thing, so replacing the cat and lambda altered nothing.
Unsurprisingly, he was really cheesed off with this and just decided to get rid of the car and thats where i come in!!
I bought it off him cheap, knowing it had this problem, but was confident that could cure it easily( and more importantly, cheaply!!).
The car runs like a dream, its good on fuel, very nippy and responsive, doesnt falter or hesitate on aceleration, and drives well. No smoke from exhaust etc.
First thing i did was put in a bottle of fuel cleaner, and thrashed it, engine management light came on after 30 minutes fast drive down the motorway, but went off after igntion turned off and on again, and stayed off.
Air filter was renewed, all exhaust was checked for leaks, none found, in fact it has a new cat, downpipe and full exhaust through to backbox.
No leaks in air system found anywhere, but i did find that the manifold bolts were a little loose, so tightened them up.
Took the car over to my friends garage, and he booked it in for MOT and it went in on tuesday(yesterday), and only failed on the damn emissions again!! same readings, co fail on fast idle tests.
We are both baffled! done everything obvious, engine runs sweet and doesnt miss a beat, so now am stumped!! does anyone have any ideas? Its so frustrating because the car is a little cracker, solid, clean and good mechanics, just this daft emissions bull***t.
I bought a 1997 corsa 1.4( ecotec engine) gls 5 door manual last week, cheap, for my daughter in law to use to get to work as her little nissan micra just gave up the ghost.
The fella i got the car from, had just taxed it for six months, and had taken it in for a new MOT, but it failed on a couple of silly things( wiper blade and brake light) plus it failed on emissions test. Specifically, the CO levels were failing on fast idle.
He replaced the cat, the lambda sensor and took it back in, and again it failed the emissions on the same thing, so replacing the cat and lambda altered nothing.
Unsurprisingly, he was really cheesed off with this and just decided to get rid of the car and thats where i come in!!
I bought it off him cheap, knowing it had this problem, but was confident that could cure it easily( and more importantly, cheaply!!).
The car runs like a dream, its good on fuel, very nippy and responsive, doesnt falter or hesitate on aceleration, and drives well. No smoke from exhaust etc.
First thing i did was put in a bottle of fuel cleaner, and thrashed it, engine management light came on after 30 minutes fast drive down the motorway, but went off after igntion turned off and on again, and stayed off.
Air filter was renewed, all exhaust was checked for leaks, none found, in fact it has a new cat, downpipe and full exhaust through to backbox.
No leaks in air system found anywhere, but i did find that the manifold bolts were a little loose, so tightened them up.
Took the car over to my friends garage, and he booked it in for MOT and it went in on tuesday(yesterday), and only failed on the damn emissions again!! same readings, co fail on fast idle tests.
We are both baffled! done everything obvious, engine runs sweet and doesnt miss a beat, so now am stumped!! does anyone have any ideas? Its so frustrating because the car is a little cracker, solid, clean and good mechanics, just this daft emissions bull***t.