[Rory]

Originally Posted by speedychuck2

Could be one of a number of things. It's weird that it hits target then tails off.

Do your wastegates rattle at all? It won't do any harm to replace boost solenoids. Maybe look at your recirc valves and pipework and make sure everything is ok there too.

Yip wastegates rattle so that looseness won't help I guess

[speedychuck2]

Originally Posted by Rory

Yip wastegates rattle so that looseness won't help I guess

It's likely your wastegates could be the cause of it then. I'm not 100% because I've never actually looked at someones logs with failing wastegates before, but I know that eventually rattly wastegates leed to 30FF codes for underboosting, so it would figure that yours may be going this way.



I think when mine go I will look at dropping of the turbos myself and either installing a new wastegate kit, or changing out completely for stage 2's.

[Rory]

In that 2nd log isn't the rail pressure really slow to get up after I floor it ? There was a long pause when I did it I've never felt before.

[dyezak]

Originally Posted by Rory

In that 2nd log isn't the rail pressure really slow to get up after I floor it ? There was a long pause when I did it I've never felt before.

No, you went WOT at 2000rpm where fuel demand is low, but as soon as you went WOT the HPFP responded with 1000psi instantly which then ramped up over time with RPM as fuel demand increased. Compare the HPFP PSI at a particular RPM back to log #1, the PSI is the same. PSI at a particular RPM is the same between your logs. You just got on it really early in log #2.

[Rory]

Ok thanks for having a look. Wonder why I'm getting these fault codes.
On another subject I've ordered boost solenoids to see if it helps my boost make target sooner in the rev range ( seems to be on target from 5000 rpm )

[dyezak]

If I am running more than 15% ethanol I'll get plausibility codes. Seems to be fairly normal when mixing in E.

[Rory]

I'd like to have e85 to play with but we can't get it here