04 3.0i flat spots at 2k and 4k revs (its not the maf)

z4all · Post by **z4all** » Mon Jan 23, 2017 10:43 pm

04 3.0i flat spots at 2k and 4k revs

its not the maf, i changed it and still got the same issue.

not sure what's going on. any one have any ideas?

mr wilks · Post by **mr wilks** » Mon Jan 23, 2017 10:49 pm

z4all wrote:04 3.0i flat spots at 2k and 4k revs

its not the maf, i changed it and still got the same issue.

not sure what's going on. any one have any ideas?

Air filter & plugs all fresh ?

Smartbear · Post by **Smartbear** » Tue Jan 24, 2017 12:49 am

Vanos solonoids can cause flat spots amongs other things

Rob

z4all · Post by **z4all** » Tue Jan 24, 2017 1:47 am

mr wilks wrote:
z4all wrote:04 3.0i flat spots at 2k and 4k revs

its not the maf, i changed it and still got the same issue.

not sure what's going on. any one have any ideas?
Air filter & plugs all fresh ?

plugs yes, air filter, not sure, just had an insp 1, is that part of an insp 1?

z4all · Post by **z4all** » Tue Jan 24, 2017 1:48 am

Smartbear wrote:Vanos solonoids can cause flat spots amongs other things
Rob

would that throw up an error? do you know how i can check this? its very subtle though.

Smartbear · Post by **Smartbear** » Tue Jan 24, 2017 9:12 am

z4all wrote:
Smartbear wrote:Vanos solonoids can cause flat spots amongs other things
Rob
would that throw up an error? do you know how i can check this? its very subtle though.

We had this on our mini, didn't throw any codes. It introduced a flat spot off idle which made gear changing lurchy & felt like a lean mixture.
A new solonoid didn't cure it, we had them purged and it's been fine ever since.
Rob

z4all · Post by **z4all** » Tue Jan 24, 2017 10:07 am

What does "we had them purged" mean mate?

Smartbear · Post by **Smartbear** » Tue Jan 24, 2017 10:19 am

z4all wrote:What does "we had them purged" mean mate?

There's an option on the diagnostics kit to purge solonoid valves, it's like bleeding brakes I think it opens the valves for a set amount of time with the engine running to purge the vanos system.
Rob

z4all · Post by **z4all** » Tue Jan 24, 2017 7:06 pm

Ah I see! Thanks mate

z4all · Post by **z4all** » Sat Jan 28, 2017 12:19 am

how much does that sort of thing usually cost mate?

z4all · Post by **z4all** » Sat Jan 28, 2017 12:19 am

how much does that sort of thing usually cost mate?

Smartbear · Post by **Smartbear** » Sat Jan 28, 2017 12:22 am

z4all wrote:how much does that sort of thing usually cost mate?

My Indy didn't charge me as I regularly took them cakes & drinks

Rob

Matt64 · Post by **Matt64** » Sat Jan 28, 2017 10:38 am

Interesting stuff. What software / diagnostic gear would you need for kind of thing. Currently I only have Carly pro.

Smartbear · Post by **Smartbear** » Sat Jan 28, 2017 12:06 pm

Matt64 wrote:Interesting stuff. What software / diagnostic gear would you need for kind of thing. Currently I only have Carly pro.

They used this machine on my car

: IMAG2608.jpg (52.26 KiB) Viewed 1288 times

Rob

cherrym · Post by **cherrym** » Sat Feb 04, 2017 10:31 pm

My 2.5si sport had a miss at 3000revs which was down to valvetronic sensor.Take the multi-plug connector on front top of rockerbox off and if you can see oil inside then the sensor seal has gone.
Search valvetronic and you will find photos of mine.

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