Seriously pissed off now. Do i need a remap?

[jpmad4it2]

hey

My car went into Renault today regarding the problems with my emissions light due to my decat, which i think is contributing to the problems with a total lack of power - the car wont even go over 2000 revs for fecks sake.
According to their computer there are 2 faults -

1) The ITG induction kit is causing an error - well not the kit itself but the fact i have taken off the original air filter
2) The second lamba sensor is causing an error. I have the sensor connected to the car with a sleeve over it, but its actually disconnected from the decat.

They said they cant do anything for me as they are not renault parts. I asked if connecting the 2nd lamba sensor up the decat would solve the error, and he said its not likely.

So where do i go from here? I have tried with the 2nd sensor totally disconnected i.e. from the car and the decat, but still the problem remained.

I was sat stationary in my car and i had the MPG screen on, the car was rumbling and churning almost cutting out. The revs were really low, lower than 10, and the MPG counter was counting down slowly until it got to 0???? What the hells that about?

I really need some advice here, do i need a remap to solve the problem due to my new modifications. I will be pissed off if i spent £600 on a full remap only to find out the problem was still there. Could it be a fueling problem?
I really need some help guys. Im thinking of totally removing the decat, replacing it with the original cat, and just leaving the magnex system from cat-back on.

any ideas?

J

 

[Thomss]

Hmm sounds like it has went in to "limp" mode which I have heard can happen.
I got my decat put on a few days ago and the guys at AAS took the sensor and put it in a tube beside it so it gets a sniff of gas only, so my light does not come on. This was a bit of a worry before I had mine done.
I'd be careful too as the guys at AAS where saying that a decat can totally wipe out any warranty....? So perhaps pop the cat back on before going back next time. Good look though, I'm sure some other guys on here will be able to help you further.

 

[Rain]

There is one possible solution, but it is expensive one.
If you take Dastek unichip Q+ you can overrun lambda signal with unichip
So, after that your problems are gone, and you also have some more power from unichip

 

[jpmad4it2]

@ Thomss - my cars out of warranty anyway.

@ Rain - how much would that set me back? Would it not be cheaper to get a remap (which i am assuming would solve the problem - correct me if im wrong)

 

[edde]

If it won't go over 2k its in safety get you home mode there a problems.
The ITG won't be causing the problem usless you managed to realy mess up installation (no idea how you could).
The second exhaust sensor shouldn't be needed or if you need it to bumg up the hole don't plug it in tape the wires up. once the warnintg lights gone off you need Renault to reset it to get rid of the light but if the second sensors unconnected there no problem.
The normal RPM should be 850 plus or minus 50rpm all 172/182 idle from cold due to emmisions mapping.
The MPG when you've stopped is bound to be zero as the cars using fuel but not going anywhere ie if you stayyed there forver the car would get 0mpg ie no files for however much fuel you stick in.
You don't need a remap.

 

[edde]

I got my decat put on a few days ago and the guys at AAS took the sensor and put it in a tube beside it so it gets a sniff of gas only, so my light does not come on. This was a bit of a worry before I had mine done.
I'd be careful too as the guys at AAS where saying that a decat can totally wipe out any warranty....? So perhaps pop the cat back on before going back next time. Good look though, I'm sure some other guys on here will be able to help you further.

182's are different ECU mapping, your sensor will go off in time. The 172's are different a disconnected sensor will not set the light off.
A decat canot destroy any warently they cna only resuse work if they canprove the modification ie the decat is responsible and they will have trouble proving that.

No point going for a remap but if you do want some more power and extra rpm then that what it can do.

 

[Dave]

Sounds like soething else is wrong.

 

[jpmad4it2]

If it won't go over 2k its in safety get you home mode there a problems.
The ITG won't be causing the problem usless you managed to realy mess up installation (no idea how you could).
The second exhaust sensor shouldn't be needed or if you need it to bumg up the hole don't plug it in tape the wires up. once the warnintg lights gone off you need Renault to reset it to get rid of the light but if the second sensors unconnected there no problem.
The normal RPM should be 850 plus or minus 50rpm all 172/182 idle from cold due to emmisions mapping.
The MPG when you've stopped is bound to be zero as the cars using fuel but not going anywhere ie if you stayyed there forver the car would get 0mpg ie no files for however much fuel you stick in.
You don't need a remap.

ive never seen the MPG do that before, even when i have been sat idle it used to remain at 34ish.

I have had the second sensor unplugged before - both unplugged from the decat and the underneath of the car. The second hole on the decat is already bungged up - i placed a bung in there before fitting it.

 

[jpmad4it2]

just to stress how bad it is - im unable to go above 20 mph here guys its that bad. I dunno what the hell is going on

 

[Rain]

@ Thomss - my cars out of warranty anyway.

@ Rain - how much would that set me back? Would it not be cheaper to get a remap (which i am assuming would solve the problem - correct me if im wrong)

Don` know if remap will solve this problem, I think not.
I don`t know what are the prices in UK for remap or unichip, here is remap 350€(200€ if there is 5 cars at once), or for unichip 700€

From my piont of view unichip is much better becouse in here, when they do remap they just put same map for every car, there is no testing on the road or on dyno.

With unichip is different, they do maps on dyno and on the road, so you get best results

 

[jpmad4it2]

how can a chip solve the problem?

 

[edde]

ive never seen the MPG do that before, even when i have been sat idle it used to remain at 34ish.

I have had the second sensor unplugged before - both unplugged from the decat and the underneath of the car. The second hole on the decat is already bungged up - i placed a bung in there before fitting it.

Its an adverage mpg.
If you sit there idling the engine and the trip says 100mpg that would mean for ever 100 miles you will burn 1 gallon if you sitting there going nowhere then you cannot be doing any milage your just buring fuel mpg is infact an error as 0 miles divided by the fuel burned at idle cannot be done matermatically.

You've got something else wrong with your car a remap won't fix it you need to get a good dealership to work it out it could possible be a faulty throttle body as this is quite common.

The car stopping itself reving more than 2k measn its in safe mode its a get you home/back to the dealership mode it means there something seriously wrong with the car.

 

[edde]

how can a chip solve the problem?

It won't, your cars got other issues.

 

[jpmad4it2]

Its an adverage mpg.
If you sit there idling the engine and the trip says 100mpg that would mean for ever 100 miles you will burn 1 gallon if you sitting there going nowhere then you cannot be doing any milage your just buring fuel mpg is infact an error as 0 miles divided by the fuel burned at idle cannot be done matermatically.

You've got something else wrong with your car a remap won't fix it you need to get a good dealership to work it out it could possible be a faulty throttle body as this is quite common.

The car stopping itself reving more than 2k measn its in safe mode its a get you home/back to the dealership mode it means there something seriously wrong with the car.

anyone else agree? or is it likely to be the decat? Is there anyone around on these forums who can have a look at it for me? Renault are a waste of time.

if it is the throttle body or something else thats faulty, wouldnt the computer have reported this?

 

[Ben j]

where r u based?

 

[jpmad4it2]

where r u based?

north west, lancashire

 

[edde]

anyone else agree? or is it likely to be the decat? Is there anyone around on these forums who can have a look at it for me? Renault are a waste of time.

Its not the decat trust me.
Depends where you are in the country I'd recomend Matt at Renault specialist breakers (he's MATT BLACK on here) if you live up North and Mike at Rentech (mike@Rentech on here) if you live down south as there some of the only people who own the Renault computers but arn't dealers.

Or just try another dealership you find some dealers are just useless it can take a few tries to find a good one there not all useless.

 

[ben_p]

long shot, but disconnect he batt for a few hours and re connect then start . mite reset the ecu. make sure you have the radio code though lol. i wouldnt cover the second sensor up either, just cable tie it unde the car so it can detect o2. also you may have a fault lambda sensor, 1 of two

 

[jpmad4it2]

Its not the decat trust me.
Depends where you are in the country I'd recomend Matt at Renault specialist breakers (he's MATT BLACK on here) if you live up North and Mike at Rentech (mike@Rentech on here) if you live down south as there some of the only people who own the Renault computers but arn't dealers.

Or just try another dealership you find some dealers are just useless it can take a few tries to find a good one there not all useless.

Renault specialist breakers in accrington?

 

[jpmad4it2]

long shot, but disconnect he batt for a few hours and re connect then start . mite reset the ecu. make sure you have the radio code though lol. i wouldnt cover the second sensor up either, just cable tie it unde the car so it can detect o2. also you may have a fault lambda sensor, 1 of two

well i have tried the ECU trick - didnt work.

Renault said that the fault is with the second sensor - but if its disconnected from the car then that shouldnt matter. (i have already tried with the second sensor disconnected but it didnt solve the problem)

 

[16v_jon]

wont be the decat , there are a few of us here with decatted cup engines me included although the emissions light will come on and go off if you have the second lambda plugged in or not, ive tested it plugged in and not and i throws the light up but doesnt go into limp mode , is the engine running ok? the throttle body may be at fault as they are known to fail (ive had 3)
i would say from experience that if there is a lack of power it will be plugs, coil pack or HT leads

 

[edde]

north west, lancashire

Drop Matt Black a message or call (the phone number on this http://www.specialistrenaultbreakers.co.uk/ website under contact us) and ask for Matt

 

[ben_p]

well i have tried the ECU trick - didnt work.

Renault said that the fault is with the second sensor - but if its disconnected from the car then that shouldnt matter. (i have already tried with the second sensor disconnected but it didnt solve the problem)

ok, but the second sensor will still want to read. all it reads is that the cat is working, if its out the car then it reads pure o2, so hence thinking the cat is doing well. but if it been dmaged when removed, and now it can read then it will go in limp mode

 

[jpmad4it2]

The website must be down its not working. i will give Matt Black a shout - i am close to accrington and thats where he is based (i think)

 

[edde]

ok, but the second sensor will still want to read. all it reads is that the cat is working, if its out the car then it reads pure o2, so hence thinking the cat is doing well. but if it been dmaged when removed, and now it can read then it will go in limp mode

If the sensor notices the cat failed then it sets the light off but shouldn't made any difference to the engine running.

 

[ben_p]

if the sensor is broke then wouldnt it go in limp? as its unkown if damage is being caused.

 

[u33db]

Obvious question here but can't you just refit the airbox and decat then drop it off with them?

 

[jpmad4it2]

I can refit the cat to see if that solves the problem - but edde seems to think its a more serious problem

 

[ben_p]

its hard to guess, with an uncommen fault. but did it start when u put the decat on? or was it fine when it was on at first

 

[jpmad4it2]

the decat was good at first and then this problem has slowly got worst over the past few months

 

[Thomss]

Before my decat the other day, I had my sensor replaced by Ren. I was told it was a common fault?

 

[ben_p]

the decat was good at first and then this problem has slowly got worst over the past few months

in that case i cant see it being the decat. as said t/b/ leads. coil. plugs. or 1sr lambda has failed

 

[jpmad4it2]

the computer would have reported if the 1st lamba failed

 

[ben_p]

the computer would have reported if the 1st lamba failed

if it was operated by someone who knows how to use it. i.e not rtes lol

 

[jpmad4it2]

nooooooooooooooo dont say that :-(

 

[u33db]

I can refit the cat to see if that solves the problem - but edde seems to think its a more serious problem

No, hes right it won't solve the problem but by leaving those bits on you're doing yourself out of getting them to fix it...causing yourself money too if you've warranty waiting to be used.

 

[jpmad4it2]

No, hes right it won't solve the problem but by leaving those bits on you're doing yourself out of getting them to fix it...causing yourself money too if you've warranty waiting to be used.

my warranty ran out a long time ago!

 

[MRBILLYUK]

nooooooooooooooo dont say that :-(

Are from near Blackburn mate ? If so get it up to SAS at guide . He's a bosch main agent but can also check out faults on siemens . He sorted out the problem on my old 172 , turned out the spark plugs were f*cked .

He's just on the right hand side , about 100 yards as you go up the old Belthorn road from the roundabout at Guide . Owners name is John , hes s**t hot , clued up and won't rip you off .

Tel 01254 261006

 

[u33db]

my warranty ran out a long time ago!

Regardless, i think renault is still your best bet for diagnosing this....they built the car, they have the equipment.

 

[The Fatty]

i would say you have more wrong than you think, the decat wouldnt make the einge work like that. i think you should look into what edde said, as the coils do like to pack up over time. also if your MAF sensor is up the creek it would produce your problems...