Hey guys new here. Question, ?? I have a 2001 Bmw 530i and have had in for repair at two different shops and they cant figure why my car will lose power after 4200 rpms it fees like it just falling flat on its face. then after I let off the gas and bring the rpms down it drives fine. It has a new fuel pump and has had the fuel filter changed about 40k ago, There are No check engine lights on , No codes, and the car has 170K on it,... Help Help, Thanks guys

5

Asked by Sep 10, 2015 at 04:18 AM about the 2001 BMW 5 Series 530i

Question type: Maintenance & Repair

Losing power after 4200rpms No check engine light.   ???

6 Answers

24,075

try and change the filter again and have full pressure checked if thats no help...

238,075

Check the DISA valve, it has been known to cause a hiccup at around 4000K. Also changing out the spark plugs might help.

1 of 1 people found this helpful.
5

Thanks Guys will do both.

1,395

Sounds like a fuel delivery issue to me, but it very well could be the DISA valve. I don't know much about it, but it's a fairly common problem among 6 cylinder E39s.

5

Thanks, I forgot to mention that when this happens it stays stuck in gear and when I let off a few seconds later it will shift as long as I slow down a bit . I cant seem to make it go over 4200 rpms. without this problem. See I bought the car with 23k have done all the services and the 100k service and so on. It has almost all freeway miles where I worked and where I lived. No City driving all rural. My problem is I dont know a mechanic I can trust here that even knows Bmw's, so I am going to do the work myself. Im too far away from a real BMW mechanic at this time. Thanks.

5

So I took it to repair shop because I couldnt find time to repair it myself. The guy told me it needs a new trans.Not fuel pump or filter or anything he could figure out it has no codes. I asked him then why does it drive fine until I punch it to the floor and why only after 4200 or so rpms does it just have issues. The engine runs fine and smooth until then it acts like something is holding it back. He said 4 grand to fix. But I just cant believe thats the problem. Call me stubborn or whatever. the car had all its maintenance done on time I drove most of its life on the freeway to work and home and never beat it.. Wth to do with this older car that is worth maybe 4 grand if it didnt have a problem. ???

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