M8 Turbo Loading Up on Bottom End

[Bridger]

Any advice.. 2010 M8 with Attitude Box Loads up Bad at Idle.. Especially when I idle down a long hill. Green setting on 1 and still RICH? Thanx in advance

 

[harf69]

check to see if the oil pump is sticking

 

[tranquillicer]

Turbo

What turbo you running?

 

[bholm87]

i have the same issue on my 2010 with bd rg, 09 head. lemme know what u find out

 

[Jeff K]

check to see if the oil pump is sticking

X2. This is a very common issue that easily gets overlooked.

 

[Bridger]

When you guys say oil pump may be sticking.... are you talking about the stock injector oil pump or the oil pump on the turbo?
BTW... this is a Push Tial System

 

[RideGuy]

Prety sure they are talking about the injector oil pump because they are notorious for problems.... What setting is your yellow at? May want to include all values when asking for help.

 

[Klimbing Kitty]

What is your fuel pressure set at?

 

[Bridger]

Fuel Pressure is set at 35psi... Low (Green) is at fast blink 1..so supposed to be off... Yellow is at 3.5....red is 4.5... boost is 7.5...
Thanks for all the posts... You guys are awsome

 

[Klimbing Kitty]

Your fuel pressure seems quite low. r u sure it is not starving for fuel?

 

[shawkins]

I am running 35 psi as well. 2 green 2 yellow 0 red 4 boost. I had to turn my pressure down that low to get the idle to lean out. You can't get as much air through a turbo at idle as you can a stock setup in my mind. Thus even with stock mapping you go very rich. The only way to pull fuel at idle is the fuel pressure.

 

[Bridger]

shawkins.... which turbo kit are you running?

 

[Bridger]

definately rich rich... just tried turning fuel pressure up to 40 then 38... wouldnt even idle at 40... loaded worst at 38... back to 35... starts and idles one pull

 

[Nubulin]

... The only way to pull fuel at idle is the fuel pressure.

One of the reasons I like the BD electronics a lot better.

To the OP: I would call Ken at Push Turbo and see what he has to say.

 

[Cosarguy]

Any advice.. 2010 M8 with Attitude Box Loads up Bad at Idle.. Especially when I idle down a long hill. Green setting on 1 and still RICH? Thanx in advance

Might want to check your vacuum/boost line to the Attitude Box to make sure it isn't pinched, whereby holding boost pressure in the box and making it think you are still on boost. Also check to make sure the vacuum/boost function in the box is working properly. It is possible the box is adding fuel, because it thinks it's reading boost. It should be flashing a code if that is the case....but not always. Just a thought.

 

[WyoBoy1000]

I've had fuel pressure gauges go out??? might want to check it against another one.

 

[shawkins]

I have an OVS kit. 35 psi I think is the leanest you can run. In certian situations I run into a lean spot down towards idle.

 

[product tester]

if its rich going down hill it could be from your clutch staying ingauged and not back shifting I got rid of my OVS clutch because of this no matter how lean I ran it I had no throttle responce down hill now I run my sled at 40 psi.