E60 power loss trail

E60 power loss trail

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Pvapour

Original Poster:

8,981 posts

252 months

Friday 20th January 2017
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Trying to solve a power loss issue on my 2004 e60 530d, which I aquired a year ago, it has always had a power drop off but not that pranounced that it bothered me, was more when pushing on which wasnt that often, but got worse and worse over the year and got slightly more smokey to boot, this lead me to the DPF which was well overdue to be changed.

As a quick fix for a holiday run I htrew some DPF cleaner through which helped loads and confirmed what I needed to do, no fault codes (carly for bmw) showed at this stage mind.

DPF was changed and car went better than it ever had, job jobbed i thought, then 1500 miles later i start getting similr power issues again, thinking blocked DPF again lead to me thinking why, now getting; EGR, throttle actuator, MAF, pressure sensor and lambada sensor errors but when cleared the only one that remains imediately is the EGR, folowed after a 10min drive by the Throttle actuator.

So, analysed some parameters while on a run and noticed engine temp. never gets above 69ºc, way to low (though -7º here at the moment)

Question is.. do you think this low temp. problem could have triggered some of those other fault codes via the DPF clogging and not being able to regen?

Also, will the DPF unclogg with a regen once both thermostats have been replaced and normal running temps achieved?would the EGR thermostat problem trigger the EGR fault code indirectly?

cossy400

3,153 posts

183 months

Saturday 21st January 2017
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BMW5forum is helpful. try that.


Huskyman

653 posts

126 months

Saturday 21st January 2017
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The car won't go into regen with the coolant temp that low. Change both of the stats and take it out for a long blast. Failing that take it to a garage with the diagnostic kit and they can force a regen while driving the car.

bigdom

2,072 posts

144 months

Saturday 21st January 2017
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I seem to remember the egr valve is removed with allen keys and a flat head screwdriver. Carb cleaner will help to clean it through, it's likely with a blocked dpf to need a clean, and those temperatures both stats need changing as well.

It's about 2hrs DIY doing them both and cleaning the valve. I'd suggest also changing the vortex/breather valve as that's liable to be clogged as well, while your at it, they prefer a clean air filter too.

Pvapour

Original Poster:

8,981 posts

252 months

Saturday 21st January 2017
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Thanks chaps, bought the two stats today so will pop em on tomorrow.

I have a force regen option with my software by the looks, hopefully it covers pre LCI cars.

See what faults occur after thats all done..

cossy400

3,153 posts

183 months

Sunday 22nd January 2017
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Any joy with this today??

Pvapour

Original Poster:

8,981 posts

252 months

Sunday 22nd January 2017
quotequote all
yeah, got them in ok but discovered the previous owner had done a diy on the swirl flap blanking plates, i.e. not bought! just screwed screws in where the rods came out, not even a rubber washer under head of screws so resulted in oil seeping down onto the engine.

i can only imagine this would lead to a big loss in pressure at the intake manifold, think they're about 30-40psi? so quite important that its air tight, I think the EGR vacuum operates off this doesn't it? most likely this is why I'm getting EGR faults thrown up, if it isn't opening or closing properly could this then throw up codes elsewhere in the system? air mass, throttle actuator etc (did get a map code as well which shows the sensor working properly i guess)