Engine going into limp mode...
Discussion
Hey guys, I'm on a bit of a sticky wicket with my Seat Leon Cupra R 225.
Twice now, I've had the engine go into limp mode in similar conditions. The red line in this car is set at 6500rpm. As I passed about 5500rpm in second gear, there was a bump noise from the engine, lights on the dash and the car went into limp mode. I set about researching the problem but turned up little info of use. One suggestion was that an aftermarket map designed for big power had a cut off at a lower rpm than the original red line, to protect the engine.
Today, it happened again, in the same 5500rpm zone but in 3rd gear. The warning lights come on, engine goes flat and will not rev above 2500rpm. Turning it off and on again puts it back into normal running mode.
It does not appear to be a problem with the turbo, both times it happened the oil and water were up to optimum temperature and the boost gauge showed the car to be boosting normally.
I was suspecting the map again, wondering if it's possible that it has a fuelling gap high in the rev range that causes the engine to go into limp mode. I spoke to a local VAG tuning specialist who reckoned it could be a dodgy map, or potentially a faulty mass air flow sensor. The thing is, I'm sure it did not do this previously, it seems to have started recently. Obviously, I want this fixed!
If the MAF was dodgy, could this cause the engine to go into limp mode, perhaps thinking it was being starved or overloaded with air when the engine is turning over quickly, or is the fuelling map the more likely culprit?
I have heard LCRs are notorious for coilpack failures, could this be the answer? What symptoms would I see if I had a dodgy coilpack? I have tried the local VAG specialist garage for more answers but unfortunately they are shut, so for tonight, I'm looking for the wisdom of PH to provide some answers!
Twice now, I've had the engine go into limp mode in similar conditions. The red line in this car is set at 6500rpm. As I passed about 5500rpm in second gear, there was a bump noise from the engine, lights on the dash and the car went into limp mode. I set about researching the problem but turned up little info of use. One suggestion was that an aftermarket map designed for big power had a cut off at a lower rpm than the original red line, to protect the engine.
Today, it happened again, in the same 5500rpm zone but in 3rd gear. The warning lights come on, engine goes flat and will not rev above 2500rpm. Turning it off and on again puts it back into normal running mode.
It does not appear to be a problem with the turbo, both times it happened the oil and water were up to optimum temperature and the boost gauge showed the car to be boosting normally.
I was suspecting the map again, wondering if it's possible that it has a fuelling gap high in the rev range that causes the engine to go into limp mode. I spoke to a local VAG tuning specialist who reckoned it could be a dodgy map, or potentially a faulty mass air flow sensor. The thing is, I'm sure it did not do this previously, it seems to have started recently. Obviously, I want this fixed!
If the MAF was dodgy, could this cause the engine to go into limp mode, perhaps thinking it was being starved or overloaded with air when the engine is turning over quickly, or is the fuelling map the more likely culprit?
I have heard LCRs are notorious for coilpack failures, could this be the answer? What symptoms would I see if I had a dodgy coilpack? I have tried the local VAG specialist garage for more answers but unfortunately they are shut, so for tonight, I'm looking for the wisdom of PH to provide some answers!
Already put a post up on seatcupra.net to see if any in the local area has VAGCOM (the VAG group diagnostic software), should provide a good idea of what is going on. The thing is, if I have to go to a garage to get the codes read it will probably end up costing £60 just to identify the fault and that's before even deciding on what course of action to take.
I had hoped that last weeks event was just a glitch but now it's done it twice I'm determined to get it fixed.
I had hoped that last weeks event was just a glitch but now it's done it twice I'm determined to get it fixed.
Well, it should be simple enough to set off the fault again, a quiet bit of road and pushing the car hard in a low gear should trip it. That said, both times it has happened it's been on hot afternoons, when turbo cars naturally have an uphill battle anyway, that may or may not be a factor.
Mastodon2 said:
Well, it should be simple enough to set off the fault again, a quiet bit of road and pushing the car hard in a low gear should trip it. That said, both times it has happened it's been on hot afternoons, when turbo cars naturally have an uphill battle anyway, that may or may not be a factor.
You need to find a friendly mechanic that'll clear the faults as cheap as possible, then replicate the fault straight away and get him to read the given fault. Not sure where you are but i have a friend that would help, we are in Swindon but 'sods law' you'll be miles away?Just looked and you're in the NE.
Gassing Station | General Gassing | Top of Page | What's New | My Stuff