Limp mode question

[Dan Cupra R]

I think Ive got :gay: limp mode at the moment, Was driving home yesterday on the motorway and decided to give it some in 5th gear.

Anyway the car was pulling nicely (on a clear stretch of m-way of course) and all of a sudden it felt like I hit the rev limiter although it was only on 5k in 5th.

As soon as it did that I lost all boost what so ever and now it drives like an astra 1.6. Does this sound like limp mode?

I will check the car at the weekend and get it hooked up to vagcom a.s.a.p, just wondering if this sounds like limp mode? & What might be causing it?

 

[acidstrato]

certainly sounds like it

could be anything causing it, slight overboost perhaps, 5k in 5th would have been around 130-140mph!
naughty Dan!

was it still the same when you switched it back on after switching the engine off? assuming you tried to

 

[Dan Cupra R]

certainly sounds like it

could be anything causing it, slight overboost perhaps, 5k in 5th would have been around 130-140mph!
naughty Dan!

was it still the same when you switched it back on after switching the engine off?

It was quite quick, I admit I did have a bit of leadfoot. Yeah I stopped after about 20mins and it was the same afterwards. The valve (considering its a split r valve) is silent, virtually no noise now. No turbo sound, no torque steer or anything.

I was driving back from wolverhampton after taking my car back to p-torque to get re re-mapped again.......

 

[acidstrato]

yeah would be since its virtually not running any boost lol
no boost no sounds

what n75 have you got?

what happened at p-torque? was it loads better than before?

could also have started running abit lean top end so maf caused a fuss.
no dash lights?

weekend is a long way away yet, just disconnect the battery for a five minutes if you cant wait, might be smart to do a TB alignment as well. after reconnecting the battery, leave ignition on without turning the engine over for about 5-10minutes. you can usually hear it clicking/buzzing.

 

[Dan Cupra R]

yeah would be since its virtually not running any boost lol
no boost no sounds

what n75 have you got?

what happened at p-torque? was it loads better than before?

could also have started running abit lean top end so maf caused a fuss.
no dash lights?

N75 hasnt been changed since ive owned the car although the car was in SEAT last week & a VAG tuning place near me to be serviced and all faults sorted.

I took it to P-Torque as there were no faults on the car and both garages said to get it re-remapped. Got it mapped again and this time it made a lot of difference, lot more responsive lower down. Will (P-Torque man) said that on the new map that the boost has been tweaked slightly to make it more responsive although he did assure me that his maps are not set up to overboost.

It was fine until about 50miles from Reading when I decided to give it some serious leadfoot and i felt it go, was well gutted as it basically meant I had driven all that way for nothing.

Best way of describing it now is like how the car used to be when the MAF was dead, just nothing. Im going to unplug the maf tonite and see what happens as it was pissing down with rain yesterday

 

[acidstrato]

yeah worth a try incase it is the maf (which it could very well be) although if its limp mode caused by a different fault then it wont do nothing. but its not uncommon for people to confuse limp mode with a faulty maf

however limpmode usually gives ou 3 or 4 psi where as if its the maf, by disconnecting it you usually get around 90% of the power back

 

[Dan Cupra R]

Yeah I will unplug the MAF tonite and see what happens, Should of done it last night but was pissed off about everything so i left it.

Ill see waht happens tonite, if no joy Ill get it up on vagcom this week and see whats gone on it.

 

[gavthelad]

before i bought it my car, the previous owner had revo installed but turned it off when i bought it. He reckoned that when he was approaching naughty speeds, if he went over a bump or caused the throttle to jolt then it would instantly go into limp mode? do you remember any deviation with your right foot at any time? I personally have never had this happen but could well point to your n75. Its gonna need a scan and a reset to start to eliminate things.

 

[Dan Cupra R]

before i bought it my car, the previous owner had revo installed but turned it off when i bought it. He reckoned that when he was approaching naughty speeds, if he went over a bump or caused the throttle to jolt then it would instantly go into limp mode? do you remember any deviation with your right foot at any time? I personally have never had this happen but could well point to your n75. Its gonna need a scan and a reset to start to eliminate things.

All I can remember is it feeling like it hit the limiter and the speed dropped off. Then I slowed down to about 70-80ish dropped it into 4th to see if that was dead and it was, No boost in any of the gears.

Thing is Ive had the car in 2 seperate garages this month, Paid out on 40k service for it, rolling road tuning, all faults rectified and the car re-remapped and still problems.

Its doing my nut

 

[Sharky_82]

have patiences.....it does eventually pay off - Do all the basic checks you can yourself as youll (fingers cross) will find its something simple -

 

[Dan Cupra R]

have patiences.....it does eventually pay off - Do all the basic checks you can yourself as youll (fingers cross) will find its something simple -

Yeah, this is what Im hoping, After spending a sht load of money this month I cant be doing with another major problem

 

[gavthelad]

have you checked everywhere for any hoses that may have blown off while it was holding boost? i take it you havnt got the engine management light up on the dash?

 

[acidstrato]

another good point, could easily be a hose thats popped off,you'd know for sure if one of the big ones had popped off but if a vac hose popped off it would be a very subtle loss of power

 

[Dan Cupra R]

have you checked everywhere for any hoses that may have blown off while it was holding boost? i take it you havnt got the engine management light up on the dash?

No not yet because it was hammering it down yesterday and I dint fancy getting soaked.

Whats the engine management light look like? Wasnt that something only on the earlier cupras? Ive got an EPC light but IIRC its related to the clutch/brake switch sensors as Ive just had those changed and I no longer have the EPC light on.

 

[Dan Cupra R]

another good point, could easily be a hose thats popped off,you'd know for sure if one of the big ones had popped off but if a vac hose popped off it would be a very subtle loss of power

I wont get to check the hoses until the weekend, Its dark by the time I get home so will have to wait for saturday. Im not going to be driving it until then anyway.

Corsa power at the mo, lol... The mighty firebreathing 1.2

 

[Sharky_82]

Yeah, this is what Im hoping, After spending a sht load of money this month I cant be doing with another major problem

Know the feeling, i have a faulty maf, and didnt think to do the "drive while disconnected check" as it was only 4 months old -

 

[Dan Cupra R]

Know the feeling, i have a faulty maf, and didnt think to do the "drive while disconnected check" as it was only 4 months old -

My MAF was replaced in december so if its gone already its sht. Do you get warranties on a MAF sensor?

Might not be the MAF yet tho...........

 

[Sharky_82]

well ill let you know in a moment, going to call stealer know and see what they say -

 

[gavthelad]

i got a 12 month warranty with my bosch one.......

 

[Sharky_82]

was that with dealer? just wondering how easy would it be walk in to a dealer and say the part is faulty, give me a new one.

cheers