Overfuelling (Soot!) and re-map

Ibizauk · 18-06-2005, 14:34

Hi. I had my PD130 custom mapped yesterday, although the performance is amazing, the car seems to be overfuelling a lot. Before the remap, it had the PD160 intake mod. It RR'd standard at 135 bhp and remapped to 185bhp and 300 lbft but they said that the standard filter was quite restrictive so this was removed and an aftermarket one was fitted which should give it a bit more - 190ish - The temperature while the car was rr'd was 26'C.

The ECU was removed and reprogrammed and then put back into the car, and I was told that it can take some miles for it to "re learn" my driving style and that the car might be slightly peaky. I've covered nearly 500 miles since the remap (Cant stop driving it!

) and ive noticed that under hard acceleration in the first four gears there is quite an amount of noticeable smoke - can be seen in the passenger mirror in daylight and through the rear view mirror at night.

Before the remap there was slight smoke under hard acceleration in the higher gears but this was only visible at night; i do expect smoke to increase as I imagine fuelling is altered as part of the remap, but it is quite smokey. Could it be heat related? Does it sound like it is overfuelling? and can this smoking do any damage to the car, i.e. the cat?

Cheers

mikejay · 18-06-2005, 14:57

who did your remap?

looking_to_buy · 18-06-2005, 14:58

out of interest, who did the remap?

looking_to_buy · 18-06-2005, 14:58

bah! :p

Ibizauk · 18-06-2005, 15:02

Jabbasport. Was part of the group buy. Dont get me wrong, I love the remap and its smoothness - my friend who has just sold his remapped ibiza was following me in his new car and commented when we stopped on how smokey the car was, which got me wondering...

Edited to add - just been out driving, temp 31'c was taking it easy generally but had a bit of open road and it puts out lots of black smoke under full throttle which tails off at about 2200 and comes back at about 3500rpm until there is a gear change. Most noticeable in 4th. Now wondering if its the map, or the heat, or the intake or the filter or a combination of the above!!

Josh_PoloGTi · 18-06-2005, 18:09

Wait until a cooler day to see if it still does it.

I've found mine smokes quite a bit on a hot day.

HellFire · 18-06-2005, 18:11

As does mine. Colder days will be much better, however you could invest in an exhaust system and FMIC

and i've also heard good things about turning the EGR valve off to cut down soot.

paxton · 18-06-2005, 19:28

Quote:

Originally Posted by HellFire

As does mine. Colder days will be much better, however you could invest in an exhaust system and FMIC

and i've also heard good things about turning the EGR valve off to cut down soot.

my car was smoking like a winner today! coming up the m3 - i had a smoke screen behind me! i slowed down because i was worried! didnt realise the weather would effect it!

Tom_vRS · 18-06-2005, 19:34

All the Furbys at Brunters today were smoking like a good un. On the way home mine was terrible.

And as for the fooking heat soak

The fact is the Furby don't like the heat. Just more reason to get a FMIC. Now I'v seen it in the flesh on Cols car - I'm in love.

Lummox · 18-06-2005, 19:44

More power = more fuel. More fuel = more soot.

Cause and effect.

paxton · 18-06-2005, 19:58

Quote:

Originally Posted by Tom_vRS

The fact is the Furby don't like the heat. Just more reason to get a FMIC. Now I'v seen it in the flesh on Cols car - I'm in love.

whats a FMIC?

Tom_vRS · 18-06-2005, 20:02

Quote:

Originally Posted by fowlerwelsh

whats a FMIC?

A Front Mounted Inter Cooler.

As opposed to the poxy Side Mounted IC thats factory fitted...

jamlip · 18-06-2005, 20:23

Front-mounted intercooler

paxton · 18-06-2005, 20:25

Quote:

Originally Posted by jamlip

Front-mounted intercooler

pics?

ScoobyChris · 18-06-2005, 20:39

Quote:

Originally Posted by Lummox

More power = more fuel. More fuel = more soot.

Cause and effect.

More fuel only means more soot if there's less air available, eg in this hot weather

Chris

Ibizauk · 18-06-2005, 20:56

Cool, thanks everyone!! I've been out in it again, and now the temp has dropped to 25ish it smokes a lot less, i think the ecu is starting to adapt as well as it seems much smoother now. I'll wait for the temp to drop and see how it goes. I thought the cupra intake and filter may help but I guess it IS hot at the moment. If it still does it on cooler days, im sure jabba could tweek it if necessary.

Hmm.. curpa TDI 160 FMIC...

And to think I forst came on here thinking i wouldnt mod my car!!

boyced · 18-06-2005, 21:04

Quote:

Originally Posted by Lummox

More power = more fuel. More fuel = more soot.

Cause and effect.

what exactly causes the soot though? is it unburnt fuel?

ScoobyChris · 18-06-2005, 21:06

Quote:

Originally Posted by boyced

what exactly causes the soot though? is it unburnt fuel?

Yep. The more air you can get in there, the more completely the fuel can burn, and the less soot

Chris

GaryM · 18-06-2005, 21:19

Quote:

Originally Posted by Ibizauk

It RR'd standard at 135 bhp and remapped to 185bhp and 300 lbft but they said that the standard filter was quite restrictive so this was removed and an aftermarket one was fitted which should give it a bit more - 190ish.

I can't see an aftermarket panel filter giving 5bhp over a clean stock filter.

YeeHaa2.0TDI · 18-06-2005, 21:32

Most aftermarket filter companies say an increase of 5% is possible, although this is at the highest RPM. It also depends on the quality of the standard paper element. These aftermarket airfilters are also more effective on newer cars with MAF sensors and lambda probes which cause more fuel to be added to keep the correct mixture with the extra airflow.

paxton · 18-06-2005, 22:26

Quote:

Originally Posted by ScoobyChris

Yep. The more air you can get in there, the more completely the fuel can burn, and the less soot

Chris

is this y u lot recomend pd160 intake?

Ibizauk · 19-06-2005, 00:33

Quote:

Originally Posted by GaryM

I can't see an aftermarket panel filter giving 5bhp over a clean stock filter.

I agree with you, and i did say "ish" and the 5bhp ish figure was what jabba said they expected the map to develop with the filter over the 185 it developed on the rr in their new building - I was guessing they would know more about it than me!

I only changed it because it was a) a standard replacable filter and near due a change anyway and according to them, the standard jobby was holding the car back slightly, and this would allow the map to fulfill full potential. This may just have been them trying to get a bit more money out of me or it may have actually made a difference - either way - if £30 on a filter makes the drive a bit better on a remap costing nearly £400 it was worth it imo, and the filtration should be better than stock?!

Not that bothered what the exact figures are for the car overall, just passing on what I was told! What I can say however is that the 'on the road' performance and smoothness of the drive have really improved and i'm happy with the way it performs.. just the slightly worrying soot!

Chavyboy · 19-06-2005, 08:42

Quote:

Originally Posted by GaryM

I can't see an aftermarket panel filter giving 5bhp over a clean stock filter.

Why ?

Diesels need as much air as possible to a point it's not like the fuel/air ratio in a petrol car. 5bhp is a normal claim and with a remap this is possible, the paper element in a standard filter isn't brilliant IMHO swap to a green cotton and more clean air is available and you get less soot.

WW_VRS · 19-06-2005, 09:23

The TT vent thing will help a bit as well in this weather I'm guessing

FabiaTDi · 19-06-2005, 09:38

Mine smokes more in hot weather too (Jabba, exhaust, 160 intake etc)

Anything over 10C i find smoke is more noticable... 30C yesterday

18-06-2005, 14:34	#1
Ibizauk Briskodian Join Date: May 2005 Location: South Posts: 21 Thanks: 0 Thanked 0 Times in 0 Posts	Overfuelling (Soot!) and re-map Hi. I had my PD130 custom mapped yesterday, although the performance is amazing, the car seems to be overfuelling a lot. Before the remap, it had the PD160 intake mod. It RR'd standard at 135 bhp and remapped to 185bhp and 300 lbft but they said that the standard filter was quite restrictive so this was removed and an aftermarket one was fitted which should give it a bit more - 190ish - The temperature while the car was rr'd was 26'C. The ECU was removed and reprogrammed and then put back into the car, and I was told that it can take some miles for it to "re learn" my driving style and that the car might be slightly peaky. I've covered nearly 500 miles since the remap (Cant stop driving it! ) and ive noticed that under hard acceleration in the first four gears there is quite an amount of noticeable smoke - can be seen in the passenger mirror in daylight and through the rear view mirror at night. Before the remap there was slight smoke under hard acceleration in the higher gears but this was only visible at night; i do expect smoke to increase as I imagine fuelling is altered as part of the remap, but it is quite smokey. Could it be heat related? Does it sound like it is overfuelling? and can this smoking do any damage to the car, i.e. the cat? Cheers Last edited by Ibizauk; 18-06-2005 at 14:39.

18-06-2005, 14:57	#2
mikejay Briskodian Join Date: Nov 2004 Location: wigan Posts: 1,164 Thanks: 0 Thanked 2 Times in 2 Posts	who did your remap? __________________ 179BHP AND 340 TORQUE!!!

18-06-2005, 15:02	#5
Ibizauk Briskodian Join Date: May 2005 Location: South Posts: 21 Thanks: 0 Thanked 0 Times in 0 Posts	Jabbasport. Was part of the group buy. Dont get me wrong, I love the remap and its smoothness - my friend who has just sold his remapped ibiza was following me in his new car and commented when we stopped on how smokey the car was, which got me wondering... Edited to add - just been out driving, temp 31'c was taking it easy generally but had a bit of open road and it puts out lots of black smoke under full throttle which tails off at about 2200 and comes back at about 3500rpm until there is a gear change. Most noticeable in 4th. Now wondering if its the map, or the heat, or the intake or the filter or a combination of the above!! Last edited by Ibizauk; 18-06-2005 at 16:55.

18-06-2005, 18:11	#7
HellFire Briskodian Join Date: Jun 2004 Location: Leeds, West Yorkshire Posts: 3,174 Thanks: 0 Thanked 3 Times in 2 Posts	As does mine. Colder days will be much better, however you could invest in an exhaust system and FMIC and i've also heard good things about turning the EGR valve off to cut down soot. __________________ Metro Blue '06' 5 Door Astra 1.8 SRi

18-06-2005, 19:34	#9
Tom_vRS Briskodaholic Join Date: Dec 2004 Location: Fenland, Cambridgeshire Posts: 11,518 Thanks: 675 Thanked 421 Times in 301 Posts	All the Furbys at Brunters today were smoking like a good un. On the way home mine was terrible. And as for the fooking heat soak The fact is the Furby don't like the heat. Just more reason to get a FMIC. Now I'v seen it in the flesh on Cols car - I'm in love. __________________ 97/R BMW 328i in Boston Green.

18-06-2005, 14:58	#3
looking_to_buy Briskodian Join Date: Apr 2004 Location: Stoke-on-Trent Posts: 214 Thanks: 9 Thanked 0 Times in 0 Posts	out of interest, who did the remap?

18-06-2005, 19:44	#10
Lummox Cupra Bush King Join Date: Sep 2003 Location: Newport Pagnell Posts: 22,276 Images: 2 Thanks: 22 Thanked 734 Times in 616 Posts	More power = more fuel. More fuel = more soot. Cause and effect. __________________ Unit 18 Automotive Services www.unit18.co.uk

18-06-2005, 20:23	#13
jamlip Briskodian Join Date: Jun 2005 Location: London Posts: 492 Thanks: 0 Thanked 0 Times in 0 Posts	Front-mounted intercooler

18-06-2005, 20:56	#16
Ibizauk Briskodian Join Date: May 2005 Location: South Posts: 21 Thanks: 0 Thanked 0 Times in 0 Posts	Cool, thanks everyone!! I've been out in it again, and now the temp has dropped to 25ish it smokes a lot less, i think the ecu is starting to adapt as well as it seems much smoother now. I'll wait for the temp to drop and see how it goes. I thought the cupra intake and filter may help but I guess it IS hot at the moment. If it still does it on cooler days, im sure jabba could tweek it if necessary. Hmm.. curpa TDI 160 FMIC... And to think I forst came on here thinking i wouldnt mod my car!!

18-06-2005, 21:32	#20
YeeHaa2.0TDI Briskodian Join Date: May 2005 Location: s yorks Posts: 140 Thanks: 0 Thanked 0 Times in 0 Posts	Most aftermarket filter companies say an increase of 5% is possible, although this is at the highest RPM. It also depends on the quality of the standard paper element. These aftermarket airfilters are also more effective on newer cars with MAF sensors and lambda probes which cause more fuel to be added to keep the correct mixture with the extra airflow. __________________ Buy the ticket, take the ride

19-06-2005, 09:23	#24
WW_VRS Escorted Estate Join Date: Nov 2004 Location: Oxfordshire/Berkshire Posts: 9,853 Thanks: 45 Thanked 81 Times in 71 Posts	The TT vent thing will help a bit as well in this weather I'm guessing __________________ WW --->> Project Journal (pic links in first post there) Lummox'/Ross thread on Unit18 Automotive progress on my car: here

19-06-2005, 09:38	#25
FabiaTDi VT5 Join Date: Dec 2002 Location: Warwickshire Posts: 2,016 Thanks: 0 Thanked 0 Times in 0 Posts	Mine smokes more in hot weather too (Jabba, exhaust, 160 intake etc) Anything over 10C i find smoke is more noticable... 30C yesterday __________________ Was: 2003 Allard Tuned Fabia vRS VT5 Turbo Conversion Now: 2008 Audi A3 Sportback TDI

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode