'Rev' Problems after fitting Decat??

[stuart1989]

On the weekend i got a Yozza decat fitted, since then a few times when ive gone to accelerate the car 'limits' at 3.5k-4k rev's?

Any ideas dudes?

 

[Cro]

Total limit or just holding back type of thing and then revving on?

 

[stuart1989]

Total limit mate, but say if its in 3rd and wont go past 4k, if i drop it into 2nd it will rev all the way. Weird thing is id been driving it for about 30 mins then it started doing it so its nothing to do with been cold etc.

 

[leeds_182]

When I decatted my 197 it became 'hesitant' at 2k but didnt hit a wall so to speak.

 

[stuart1989]

Ahh mine is literally hitting that rev range then just bouncing on it, god knows whats going on

 

[Damo_Sport]

sensor gone?

 

[YorkshireDaz]

Limp mode?

 

[stuart1989]

sensor gone?

Which one?

Limp mode?

What would be causing it, the decat i presume?



Im no mechanic

 

[Si]

a light comes on on the dash if it's in limp mode.

 

[leeds_182]

Throttle body issue?

 

[jack_davey]

sounds like a f*cked/unplugged map sensor to me

 

[stuart1989]

a light comes on on the dash if it's in limp mode.

There is a light on but thats due to emissions im sure.

sounds like a f*cked/unplugged map sensor to me

Might have to pop it into the Stealers to have a quick look :\

 

[Si]

yer the emissions light will be on due to the lambda... the light that comes on in limp mode is in the centre, between the dials.

 

[escotty90]

M8 mine was doin this a few weeks back and i have a Milltek with decat. Turned out to be a faulty lamber sensor, so i just replaced the both of them and it has run fine since.

Maybe your sensor got slightly damaged wen fitting the system (decat)... dosnt take much to damage them.

 

[escotty90]

p.s if its usually the sensor nearest to the manafold that causes the car to go into limp mode and limit your revs when bust.

Defo worth checkin them. If they are dead then dont go to Renault coz they charge like £100+. i got mine from some Auto parts place in Northamptomshire for bout £55-60 il find u the details if u need them.

Ed

 

[john lloyd]

sounds like the lambda sensor has been damaged in the refitting process mate. i think it can cause limp mode via the ecu but yours seems to be on/off which is a bit unusual change the lambda sensor mate in your cat (assuming you got one which had the input and its not been cable tied up out of the way

they do universal lambda sensors for about £40 but best bet is a branded one is half way between the universal and the delaer prices.

 

[Martin_172]

usually the lambda sensor only causes issues like this when the engines cold. in my experiance anyway.

 

[stuart1989]

usually the lambda sensor only causes issues like this when the engines cold. in my experiance anyway.

It strange, i dont have any other warning lights on, and it does it when its warm...

 

[stuart1989]

Im gonna get the Map sensor checked first then get a new Lambda sensor fitted, hopefully this will solve the problem. If anyone has any other ideas, feel free to let me know! Cheers

 

[AlexG]

Do you have two lambda sensors? If they are the same try swapping them around?

 

[SBV116]

Upstream lambda my guess!

 

[Chris205]

I know the 106/saxo's have issue's with the crank sensor limiting revs

Check the wiring isnt damaged to the lambda or better still if you can, get it on a diagnostics machine