Decat pipe with no lambda sensor

[D1CKY]

Am i correct in saying that if i run my decat with no 2nd(back) lambda sensor and have the lambda sensor hole plugged the only problem this will cause is switching the engine light on the dash till one is refitted ?

Then the light will go off, or do i need a fault code reader to turn it off ?

Would i come across problems running my car like this ?

Or would the car just run richer than normal but with the engine light on ?


Opinions welcome.

 

[AlexG]

Yeh should be fine tbh. Ran like this for a year with a saxo. The second lambda only reads after cat emmisions, doesn't control fueling or anything.

Not sure whether you will need to delete the dtc to turn the light off.

 

[sideways danny]

wont effect running at all.

Infact, if you run the sensor outside of the exhaust, you wont get any warning lights coming on

 

[chris182cup]

My rear sensor is broke, exhaust light is on I just live with it

 

[Christopher]

wont effect running at all.

Infact, if you run the sensor outside of the exhaust, you wont get any warning lights coming on

Yep!

I've used a metal cable tie to hold up against the chassis rail, then bunged the hole in the decat with a bolt.

 

[GR4H4M]

wont effect running at all.

Infact, if you run the sensor outside of the exhaust, you wont get any warning lights coming on

Yep!

I've used a metal cable tie to hold up against the chassis rail, then bunged the hole in the decat with a bolt.

Wow, you learn something new everyday

Looks as if I'll be on my back again tonight, only fitted the blinking decat last night!!

 

[stani250]

when i fitted my decat the light would come on and go off every now and again. its now just allways on but it hasnt affected my mpg's at all. but its m.o.t time so i need to do a switch back to the normal cat. thats the only thing annoying about them! lol but suppose it only comes around once a year.

 

[theduck]

As above. Second lambda is just to make sure the CAT is working.

 

[D1CKY]

Ok cheers guys.

Now time to find a bolt to plug the hole.

Anyone ideas on thread size ?

 

[AlexG]

Use a lambda blanking hole plug. On saxp people sold special sleeves for the lambda sensor which was basically a tube with a capped off end and a lambda size thread in the other. Screw lambda into this and it would always read cold air and wouldn't get damaged. Then just secure it somewhere.

 

[D1CKY]

Use a lambda blanking hole plug. On saxp people sold special sleeves for the lambda sensor which was basically a tube with a capped off end and a lambda size thread in the other. Screw lambda into this and it would always read cold air and wouldn't get damaged. Then just secure it somewhere.

Ah righty, don't suppose you know the size of the lambda do you ?

 

[Mark One]

wont effect running at all.

Infact, if you run the sensor outside of the exhaust, you wont get any warning lights coming on

tru dat

Just don't put tie it up in a plastic bag.....they are heated and melt the plastic lolzerz

 

[Mark One]

Ah righty, don't suppose you know the size of the lambda do you ?

It's a 22mm spanner. You could always get agressive with a grinder till you can get a socket over it.
edit: thread size. not so sure.

 

[Lagerlout]

I think the thread is 18mm x 1.5. tbh... I was going to blank mine, but eneded up just sticking the second lamda in. In 3000 miles, never saw the EML once! Go figure!

 

[D1CKY]

It's a 22mm spanner. You could always get agressive with a grinder till you can get a socket over it.
edit: thread size. not so sure.

By thge size i meant the threads mate, lol at the grinder comment.....

I think the thread is 18mm x 1.5. tbh... I was going to blank mine, but eneded up just sticking the second lamda in. In 3000 miles, never saw the EML once! Go figure!

Cheers for the size, i bidded on a sensor on ebay and got on for £18 so i'll use that to plug it

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140408939665&ssPageName=STRK:MEWNX:IT

 

[Mark51]

tbh id leave it it, i have a kind of de-cat on mine and had the light come on once when giving it some for a while.

Does have a mis-fire though between 1k and 2.8k but think that may be something else

 

[D1CKY]

tbh id leave it it, i have a kind of de-cat on mine and had the light come on once when giving it some for a while.

Does have a mis-fire though between 1k and 2.8k but think that may be something else

What you mean a kinda decat ?

 

[fixedgear]

I have DTC's from my Lambdas.

Am I right in saying that If I have a fault with my Upstream lambda that if I swap the upstream and downstream lambdas (thinking the downstream is good) that this could potentially fix a running problem I have.? As the downstream will then throw an EML but that's it?

 

[levaz]

apparently my cars a freak and this has never been known before.
But.
I've got a good lambda pre-cat, then a bolt in 2nd hole (decatted)
The 2nd sensor isn't even plugged in, it's in the boot attached to a sport cat for mot time.

I have no EML, been like it for 6 months.

according to everyone else, no 2nd lambda will give an eml, mine begs to differ.

 

[Chrisgti6]

apparently my cars a freak and this has never been known before.
But.
I've got a good lambda pre-cat, then a bolt in 2nd hole (decatted)
The 2nd sensor isn't even plugged in, it's in the boot attached to a sport cat for mot time.

I have no EML, been like it for 6 months.

according to everyone else, no 2nd lambda will give an eml, mine begs to differ.

Any map on it? It could have been mapped out

 

[levaz]

Any map on it? It could have been mapped out

If there is, it was done before I bought the car, and I've had it 6 odd years.
No proof of it being mapped or receipts etc, but thats not to say it isn't
(but then, it only had 1 receipt with it, and that was for 2 tyres!)

 

[fixedgear]

Ok, good to know