Hello I bought my cupra r a couple of months ago since had a forged engine put in forge tip/DV, decatted, air filter remap you get the pic. Now the car has no idle problems solid idle no misfires but when I'm in first/second gear car pulls like a train the more I go up the gears the more it hesitates or like its struggling to make power at full throttle. I was driving last night (private land) keeping a steady 100 plus in 6th now when I put my foot down turbo spools up but the car doesent take off like it should. If I press say half throttle and try to keep boost near 10-12 psi it pulls hard as soon as I toe it boost rises to 18-22 psi but car goes sluggish, just as you lift the throttle it surges again near half throttle. If I am at 2.5k revs in sixth boost will peak at 24-26 psi and slowly drop to 17-19 at its lowest on full throttle.
Leon cupra r mk1 boosting problem
- Thread starter Chrisallen649
- Start date
Disconnected maf took it for a squirt down the motorway seems a big improvement from what I can tell so here's hoping when I connect a fresh Bosch one it gets even better!
Hi well I've been told yes it's a bit high at 26psi. If the boost drops after 4K revs to around 18 give or take I would not worry.
Try disconnecting your MAF it will give an error code. I bought a second hand k&n filter as mine had destroyed itself along with the filter came a second hand MAF which matched mine. I have put this on now I can notice a better throttle responce and I'm getting full power at full throttle but it's still slightly laggy for lack of a better word on the pedal. Verdict. Don't buy second hand mafs I know it's the problem so for 130 from the dealers I'll be getting a new one tmw. Only buy Bosch genuine part and match the numbers as there are mafs that look the same but arnt. Easily checked with seat as I did. The difference is night and day though I'm happy I found the problem
Try disconnecting your MAF it will give an error code. I bought a second hand k&n filter as mine had destroyed itself along with the filter came a second hand MAF which matched mine. I have put this on now I can notice a better throttle responce and I'm getting full power at full throttle but it's still slightly laggy for lack of a better word on the pedal. Verdict. Don't buy second hand mafs I know it's the problem so for 130 from the dealers I'll be getting a new one tmw. Only buy Bosch genuine part and match the numbers as there are mafs that look the same but arnt. Easily checked with seat as I did. The difference is night and day though I'm happy I found the problem
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