Gary_1986 Posted July 12, 2021 Report Share Posted July 12, 2021 (edited) Hi all hope all is well my names Gary and I am new to bmws, have driven few cars mainly vw and ford's but new to this. I have bought a car and recently have had problems with it the main problem is it refuses to go above 2600 rpm and it has a small rpm dip when it's cold. Drop from 900 to 800 then back to 900 and down again after I run the car there's none of that at all. It also seams to be burning oil. Now the main problem with it in more detail when I put the foot down the car will move and its right and sharp but as soon as I hit 3000 in lower gears and 2600 in 3rd to 6th it will behave like it wants to stall it'll make a flutter in the engine. Of course I do not push it on I put it up a gear back off the throttle wait 10 to 30 seconds then the car will be fine but it'll still behave the same way at the rpm range mentioned. And it also runs heavy on diesel only 44.1mpg to the computer. Its also not throwing up any codes what so ever... had 3 scanners on it now I have pull injectors they are fine, intercooler came off its dry so turbo is fine. Every mechanic thinks it the fuel delivery system but I can't really start to yank parts off it it'll be expensive. I'm hoping someone here had the same problem. Thanks in advance Gary Edited July 13, 2021 by Gary_1986 Link to comment Share on other sites More sharing options...
incredirog Posted July 13, 2021 Report Share Posted July 13, 2021 (edited) Hello, you’ve come to the wrong place with your futuristic E90 but i’ll try and help, What else did the mechanics say, did they diagnose it and say fuel system or just guess based on what you’d told them? Could be the high pressure fuel pump not delivering enough juice when you boost? I’m amazed there are no fault codes, have you run BMW specific software and taken live readings? Edited July 13, 2021 by incredirog Link to comment Share on other sites More sharing options...
Gary_1986 Posted July 13, 2021 Author Report Share Posted July 13, 2021 (edited) 2 hours ago, incredirog said: Hello, you’ve come to the wrong place with your futuristic E90 but i’ll try and help, What else did the mechanics say, did they diagnose it and say fuel system or just guess based on what you’d told them? Could be the high pressure fuel pump not delivering enough juice when you boost? I’m amazed there are no fault codes, have you run BMW specific software and taken live readings? Hi to start with I tried to enter the E90 section on here but it wouldn't load. I tried several times. I'm being told several things from 3 different mechanics one said turbo was the problem so that came off nothing wrong. Second was injectors so pulled them tested the was told they were perfect. Finally was told egr and dpf was both gone so I got those mapped out and dpf gutted (which I plan on replacing) but still nothing. I'm not sure what rpm the high pressure pump kicks in at. Mechanic 2 said that the BMW wouldn't run at all if that was the problem. Edited July 13, 2021 by Gary_1986 Link to comment Share on other sites More sharing options...
Gary_1986 Posted July 13, 2021 Author Report Share Posted July 13, 2021 2 hours ago, incredirog said: Hello, you’ve come to the wrong place with your futuristic E90 but i’ll try and help, What else did the mechanics say, did they diagnose it and say fuel system or just guess based on what you’d told them? Could be the high pressure fuel pump not delivering enough juice when you boost? I’m amazed there are no fault codes, have you run BMW specific software and taken live readings? Hi to start with I tried to enter the E90 section on here but it wouldn't load. I tried several times. I'm being told several things from 3 different mechanics one said turbo was the problem so that came off nothing wrong. Second was injectors so pulled them tested the was told they were perfect. Finally was told egr and dpf was both gone so I got those mapped out and dpf gutted (which I plan on replacing) but still nothing. I'm not sure what rpm the high pressure pump kicks in at. Mechanic 2 said that the BMW wouldn't run if that was the problem. https://youtube.com/shorts/H2CYC1QcUO8?feature=share I couldn't upload this video to the server as its too big so I upload to YouTube. This happens mainly when the engine is cold and ran in the morning. Link to comment Share on other sites More sharing options...
incredirog Posted July 13, 2021 Report Share Posted July 13, 2021 I didn’t even know there was an E90 section!! anyway there’s only about 5 active people on this forum so it’s slim pickings for advice at best! you say you’ve had things mapped out is it still running the base performance map? Link to comment Share on other sites More sharing options...
Gary_1986 Posted July 13, 2021 Author Report Share Posted July 13, 2021 4 hours ago, incredirog said: I didn’t even know there was an E90 section!! anyway there’s only about 5 active people on this forum so it’s slim pickings for advice at best! you say you’ve had things mapped out is it still running the base performance map? Naw she's running a 210bhp map with no egr and dpf Link to comment Share on other sites More sharing options...
incredirog Posted July 13, 2021 Report Share Posted July 13, 2021 dude it could be anything, maybe the map is screwy? Link to comment Share on other sites More sharing options...
Gary_1986 Posted July 13, 2021 Author Report Share Posted July 13, 2021 1 hour ago, incredirog said: dude it could be anything, maybe the map is screwy? Yeah I'm going to get a standard map put back in, hopefully then the car will throw up what it needs guy thinks it has been mapped badly and sensors took.oit which would tell him what's wrong Link to comment Share on other sites More sharing options...
momo Posted July 14, 2021 Report Share Posted July 14, 2021 (edited) Welcome.. You've missed some key info - what model is it? You've said Diesel - What engine size? From the 210bhp i'm assuming it's a 318d or a 320d so the 4cyl diesel. Manual/Auto? If you gut the DPF it'll be sending false readings until it's mapped out. Was it working normally after you gutted the DPF for a while? Or did this happen straight away? If you gutted the DPF after this happened the car may think there's still an issue with the DPF not regenerating or something. I would take it to a mapper who can also do diagnostics (not the usual £50 scanners, the real, proper BMW diagnostic software) to get the DPF and EGR mapped out. Get diagnostics done before (probably clear), map them out and check again after or see if there's a way of forcing the computer to think it's already been regenerated before mapping out. The E46 diesel has 2 fuel pumps, one in the tank and one under the passenger seat under the car. Blockages can cause similar issues. At the very least i'd consider a fuel filter change. Another common issue that can stop it reving to the turbo is thermostats. I think you'll have 2? They may need replacing. Edited July 14, 2021 by momo Link to comment Share on other sites More sharing options...
Gary_1986 Posted July 14, 2021 Author Report Share Posted July 14, 2021 4 hours ago, momo said: Welcome.. You've missed some key info - what model is it? You've said Diesel - What engine size? From the 210bhp i'm assuming it's a 318d or a 320d so the 4cyl diesel. Manual/Auto? If you gut the DPF it'll be sending false readings until it's mapped out. Was it working normally after you gutted the DPF for a while? Or did this happen straight away? If you gutted the DPF after this happened the car may think there's still an issue with the DPF not regenerating or something. I would take it to a mapper who can also do diagnostics (not the usual £50 scanners, the real, proper BMW diagnostic software) to get the DPF and EGR mapped out. Get diagnostics done before (probably clear), map them out and check again after or see if there's a way of forcing the computer to think it's already been regenerated before mapping out. The E46 diesel has 2 fuel pumps, one in the tank and one under the passenger seat under the car. Blockages can cause similar issues. At the very least i'd consider a fuel filter change. Another common issue that can stop it reving to the turbo is thermostats. I think you'll have 2? They may need replacing. Yes it's a 2008 320d but her chair snapped so have an engine from a 318d it has the injectors and turbo from the 320d so as engines both the same just one detuned with smaller injectors and turbo surly it's 320 just lol and it's manual I bought it from a mechanic and when I bought it it was in full limp mode wouldn't do 2000 rpm and couldn't do 60 mph, he said he'll get it going he's putting it down to turbo but surely there's sensors for this. I have had it on a scanner that bmw supply to the garage they are a company called JKC in Coleraine only do bmw both sell and repair. I'll get the filters oil and fuel. Boy I bought it from thinks it might be a switch for one of the pumps as he's tried several pumps for this problem (he's got 3 there he's breaking) I'll just let him try see Link to comment Share on other sites More sharing options...
incredirog Posted July 14, 2021 Report Share Posted July 14, 2021 that is a flipping complicated mix of parts you’ve got going on there! are you running the correct engine management for the engine you have fitted? 318d and 320d have different cam shaft profiles, could be part of your problem if the physical durations don’t match with what your computer is telling it to do when the boost comes on? I’m guessing now this sounds like an absolute nightmare to sort out, good luck 🤣 momo 1 Link to comment Share on other sites More sharing options...
