somethings not right

Luke1990 · Post by **Luke1990** » Fri 19 Mar, 2010 15:13

having a problem with my 1.9i s reg m44 roadster. when the engine is cold it runs fine.but when it warms up i loose lots of power and it judders going up the rev range the exhaust note also changes from the normal rasp to a deeper flatter noise.has been in to the garage and the computer says there is no problem. help please.

paulb1976 · Post by **paulb1976** » Fri 19 Mar, 2010 15:18

not to familiar with the 1.9 but in my opinion sounds like a cam sensor is playing up as they start to produce faults as they warm up, my crappy old vectra had this problem for ages. It's the cheaper of the fixes for starters, but go with OEM parts as it caused me no end of problems when I changed the Zeds at xmas - hope this helps

Luke1990 · Post by **Luke1990** » Mon 22 Mar, 2010 20:06

is there anyone out there thats had the same problem because i don't want to start throwing money at something thats not causing the problem

neil_p · Post by **neil_p** » Mon 22 Mar, 2010 20:47

Hi.

had exactly this problem only a couple of weeks ago. Fine when cold, but difficult to re-start when warm, and as flat as a fa*t on anything over minimum throttle openings.

2.8 with 115k miles and I've put 100k of that on so no the car well.

Changed both cam sensors for an instant cure.

Pretty sure that the exhaust one had failed, as when I took the wiring plug out it was full of oil!

Luke1990 · Post by **Luke1990** » Mon 22 Mar, 2010 21:13

thanks mate il tell my stupid mechanic haha its been doing my swede for 2 weeks now will repost when the works been done

99sei · Post by **99sei** » Mon 22 Mar, 2010 21:27

are there two sensors on the 1.9? where is the other one? i can see the one at the front of the engine

Wessex · Post by **Wessex** » Tue 23 Mar, 2010 08:38

Don't be too hard on the mechanics. The cam sensors don't trigger fault codes for some reason so unless the mechanic is really familiar with these type of failures then you get led down the garden path of having all the usual bits changed and throttle valve cleaned.

Go to a good independent as I did when my 2.8 developed the exact trouble as yours did. Change of sensor was like, well a life changing event.

Peter

Post by **Robert T** » Tue 23 Mar, 2010 09:08

It isn't guaranteed that it is the cam shaft sensor, but it is quite likely that it is the cause. They quite often don't log a fault code. The good news is that there is only one on the M44. When mine went on the blink, the running was much worse than yours - it would rev then cut out - I had to limp it off a very busy dual carriageway, otherwise I wouldn't have tried running it at all.

Cheers R.

Luke1990 · Post by **Luke1990** » Fri 02 Apr, 2010 18:28

my mechanic said he isn't going to change the part until he knows what the problem is for definite its really p***in me off now.struggles to get up hills. might sell it as it is.

Lazzzydog · Post by **Lazzzydog** » Fri 02 Apr, 2010 19:16

Get it booked into Specialist Cars in Shrewsbury before you do anything rash like selling it. They're a really good Independant with first rate knowledge of BMW's. I wouldn't mind betting they would put it right in a hour or so while you wait, and you'll leave with both arms and legs intact!

Wessex · Post by **Wessex** » Fri 02 Apr, 2010 19:55

Good Grief Luke, sell it as it is and you'll loose a hell of a lot more than the cost of a cam sensor and it's fitting.

My car, that exibited the same symptoms as yours, did not show any codes on a scanner at a normal garage. I took it to an independent BMW specialist who solved the problem and his scanner DID show a problem. So, get it taken to someone who knows the marque. These cars are specialised and there are guys out there that understand them better than the average mechanic.

I took mine to a mechanic who changed the plugs, air filter (broke a clip in the process), cleaned the throttle valve body and charged me £200 for the privilege of returning the car that still accelerated like a donkey on Blackpool sands.

Once you get that kick in the arse back, you'll glad you hung onto her. Summer's coming!!!

Wessex · Post by **Wessex** » Fri 02 Apr, 2010 20:00

Luke1990 · Post by **Luke1990** » Thu 15 Apr, 2010 18:27

had the camshaft sensor done. the diagnostic also said that there was a misfire and the air mass meter has gone would the air mass meter being faulty be the reason for the miss fire??getting the air mass done at the weekend anyway but it would be a weight off my mind if it is.

Mike Fishwick · Post by **Mike Fishwick** » Fri 16 Apr, 2010 08:46

It's more likely to be an air leak between the MAF and the inlt manifold. This would weaken the mixture, the effect being more marked as the engine temperature rises and the mixture is leaned off.

Luke1990 · Post by **Luke1990** » Sat 17 Apr, 2010 17:16

went back to the mechanic today. no more air mass fault but now misfire cyl 1. have changed the plugs and the coil pack but still the same. other than the leads what could be causing this????? please help

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