Hitting a rev limit to early? - SEAT Cupra.net

Muffew · 03-03-2010, 12:55

Hello, i have an 02 leon cupra, it has had a remap a couple of years ago, just recently i have noticed that its not quite right. It is fine up to about 4.5 revs then the power just drops, the max speed i can get out of the car is about 118mph! I have had a lot more out of it than that. I have hocked it up to see what faults are there and it came back clean! It seems to be in all gears (only tried from second onwards!) Any ideas?

If there was a problem with the mass air flow sensor would it not show up on the dash or the computer when it was tested?

*MrBen2k7* · 03-03-2010, 15:28

Quote:

Originally Posted by Muffew

Hello, i have an 02 leon cupra, it has had a remap a couple of years ago, just recently i have noticed that its not quite right. It is fine up to about 4.5 revs then the power just drops, the max speed i can get out of the car is about 118mph! I have had a lot more out of it than that. I have hocked it up to see what faults are there and it came back clean! It seems to be in all gears (only tried from second onwards!) Any ideas?

If there was a problem with the mass air flow sensor would it not show up on the dash or the computer when it was tested?

MAF wouldn't always throw up a dash light. No lights both times it went on mine.

It should show a fault code though...

*vroomtshh* · 03-03-2010, 15:48

MAF doesn;t show a fault code

*adam cupra 20vt* · 03-03-2010, 16:05

When MAF dies it usually brings on the TC light and does record a fault code but does not usually bring the EML on.

Muffew · 03-03-2010, 19:40

I spoke to my Mrs dad (he's my mech) he said it might not register a code if it doesn't effect the emmissions, so tomorrow i shall take the MAF off and see what happens, then go from there. Some1 mentioned a blocked fuel filter, I dont think it is as it happens at certain points, as in the same time all the time. If it was the fuel filter would it not be at random times and i would feel it through the gears not towards the top end?? huh!

Muffew · 07-03-2010, 15:09

i changed the MAF and i did nothin no change at all! any ideas?

*sambryant* · 07-03-2010, 15:18

small boost leak somewhere, too small to set the ecu off but big enough to effect performace! cant think of anything else really

*JamesL* · 07-03-2010, 15:19

try running without the maf and see if you notice a difference.

*MrBen2k7* · 07-03-2010, 22:08

clean the throttle body?

TWR_Jaguar · 07-03-2010, 23:54

Sounds like the same symptons I had. Turned out to be the crank position sensor.
http://www.seatcupra.net/forums/showthread.php?t=255484

03-03-2010, 12:55	#1
Muffew Full Member Join Date: Jan 2009 Posts: 31	Hitting a rev limit to early? Hello, i have an 02 leon cupra, it has had a remap a couple of years ago, just recently i have noticed that its not quite right. It is fine up to about 4.5 revs then the power just drops, the max speed i can get out of the car is about 118mph! I have had a lot more out of it than that. I have hocked it up to see what faults are there and it came back clean! It seems to be in all gears (only tried from second onwards!) Any ideas? If there was a problem with the mass air flow sensor would it not show up on the dash or the computer when it was tested?

03-03-2010, 16:05	#4
adam cupra 20vt Built Not Bought. Join Date: Mar 2005 Location: Mud Hut Posts: 5,875	When MAF dies it usually brings on the TC light and does record a fault code but does not usually bring the EML on. __________________

07-03-2010, 15:18	#7
sambryant RoadRunner meep meep Join Date: Mar 2009 Posts: 1,013	small boost leak somewhere, too small to set the ecu off but big enough to effect performace! cant think of anything else really __________________ FMIC, milltek cat back, scorpion decat, 18" BBS CH, Neuspeed P-Flow, forge 007p, forge cold side kit, red hoses, red tip, n249 bypass, 6000k Hids, full vag com.

07-03-2010, 15:19	#8
JamesL Senior Member Join Date: Dec 2007 Location: Reading Posts: 1,545	try running without the maf and see if you notice a difference. __________________ We will remember them Seat Leon 1.9 tdi

07-03-2010, 22:08	#9
MrBen2k7 Senior Member Join Date: Aug 2007 Location: Cheltenham Posts: 943	clean the throttle body? __________________ Mods so far - Fabia Rear Wiper, C2 Aerial, Green Cotton Filter, Alpine iDA-x305, Nightbreaker H1 & H7 www.showerspares.com - Spare parts for Showers

03-03-2010, 15:48	#3
vroomtshh Full Member Join Date: Sep 2005 Location: Dreghorn, Scotland Posts: 956	MAF doesn;t show a fault code

03-03-2010, 19:40	#5
Muffew Full Member Join Date: Jan 2009 Posts: 31	I spoke to my Mrs dad (he's my mech) he said it might not register a code if it doesn't effect the emmissions, so tomorrow i shall take the MAF off and see what happens, then go from there. Some1 mentioned a blocked fuel filter, I dont think it is as it happens at certain points, as in the same time all the time. If it was the fuel filter would it not be at random times and i would feel it through the gears not towards the top end?? huh!

07-03-2010, 15:09	#6
Muffew Full Member Join Date: Jan 2009 Posts: 31	i changed the MAF and i did nothin no change at all! any ideas?

07-03-2010, 23:54	#10
TWR_Jaguar Full Member Join Date: Nov 2009 Location: Bristol/Plymouth Posts: 31	Sounds like the same symptons I had. Turned out to be the crank position sensor. http://www.seatcupra.net/forums/showthread.php?t=255484

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