Since i got my Z out of its winter storage, the boost has been acting wierd. Before it went away it would peak at 18PSI then tail off as the revs rise. ( know why, thats not the problem). I have a greddy profec e01 and an aftermarket boost gauge. I havent changed any settings or touched anything under the bonnet.

So the problem, The eo1 and aftermarket gauge are showing different readings. The e01 is down by 7psi, and it seems its trying to control the boost accordingly.

If i turn the engine off but turn the ignition back on, the gauge reads 0psi, but the e01 shows -7 psi. and this goes on throught out the rev range.

So at peak i get 0psi on the eo1, and about 10 (just under 0.7 bar) on the gauge.

But, now here is the really strange bit, if i boot it, boost does as above, then if i let off, and boot it again, boost will hit closer to 16 psi on the gauge and about 7 on the eo1.

Oh and just to make it even more difficult to diagnose, sometimes (rarely) ill get in it and the gauge and e01 are reading the same and all is well.

HELP!!!

Many thanks is advance to anyone who want to tackle this one.

Danny

Well i was in the car today and its fixed itself. I notice that when the problem was there that i couldnt hear the boost solanoid as it came on boost. And even if i turned the boost controller off it made no difference. Back to normal now though, would still like to know if anyone has any ideas about what might have caused this. Its bound to go again.

cheers

danny

Very strange matey, it has puzzled me!!! Good to see it has sorted itself out. Am sure a more technically minded zedder will post here soon.

 

Al.

Cheers mate, yeah, hope so. Dont like intermitant faults. Cant relax till in know what it was and solve it.

Bring on the experts.

thanks

danny