Where's my power gone? 330d sport

[Liam79]

Its a strange one this. Sometimes when i get to about 80+ and put foot to floor nothing happens no increase in speed etc. Sometimes its fine. Ive had it re-mapped a few weeks ago could this be the problem as i dont think it was doing it before that? Anyone else had similar problems?

[TommyTT]

I would get the MAF checked.

[Liam79]

Whats that mate? Something to do with the air flow?

[Zead]

It might be, but it could be a number of things. Get an indi to do a fault check. Stealers will take a dim view of a remap and blame everything on that. This should pick up most things. The remap may have asked too much from the fuel pumps so they are no longer supplying the pressure needed. Fuel pump relay. Pressure sensor on fuel rail. and as said MAF (Mass Air Flow) meter. Just been through the same with mine and posted loads on here. Check my posts.

Z

[Vixpy1]

MAF, but also who did the remap.

[dxb335d]

Who did your re-map?

best to speak to them first!!

[Liam79]

It was a lad who was recommended by jeffc on here. It seems sometimes that when i put my foot right to the floor nothing happens then a second later nearly snaps my neck!. Once im on 2000 revs or higher its instant. Its really annoying me.

[Liam79]

What type of place would check this out for me?

[Liam79]

Just been for a run on the motorway then. When i floored it from a standing start it waits a sec then goes and goes until about 80mph at 2500rpm and seems to be hitting a rev limiter and doesnt really go above it. Went on to the roundabout and come back and it hit 120mph with no probs of revs at all. It does seem to have a lack of response from first flooring it at any speed. For instance, there would be no chance of wheelspinnig it (not that a would want to, just gives you an idea) as there's no instant power there. Its really embarrasing as try when i try to overtake someone sometimes i cant get past its ridiculous.
I see people have mentioned MAF. What is it and what would it cost to get checked or replaced?

[JeffC]

Ive had this before on 330d"s , its been the airmass meter on both cars , down side is you cant just put one on, you need to have it coded in by the dealers, First one I did I got afm from andrew Pages and put it on and car was worse till it was coded in Airflow meters when they go normally make the car hesitant and give them a flat spot , having more power will make the problem seem worse as the boot will come in harder iyswim . Was the car ok when Jamie first did it , if the map was too strong any faults would have appeared on your first test drive in my experience. My next door neighbour has had the strongest setting in his X5 3.0d for the last 2 years with no problems.

Edited by JeffC on Friday 1st February 18:04

[Liam79]

Yeah the car seemed ok when he first done it. Like i say it picks its time to have no power and its not all the time.
How much did it cost to get it sorted on yours?

[JeffC]

It was years ago, I got it done at Mill Boldon and seem to think was around £270 , its the hours labour that killed the price (£100 ish ) pretty sure that you can get a flow meter from the likes of Pages now though (vag ones are now £50-£70 )

[Liam79]

Ive phoned Jamie who done the re-map and he's gonna come back up and sort it. Try it back at standard then do the re-map again. Problems have only arisen since the remap so hopefully this should sort it out.

[JeffC]

Ive got him up here on the 15th to do an E90 330d manual, looking forward to that, I reckon that will fly.

Personally I would get your car on a diagnostic first and get the fault codes read, bmws have so many sensors, water/fuel air temp etc that when they have a fault the first thing they do is cut the turbo killing performance. If it turns out to be airmass meter and it goes into the dealers, they could over write the software and you will have to get him back out again to install the modified map as they will install standad software.