Bogging

[martin t]

Hi there thanks for letting me into the forum loads of great stuff here.
I have a Vh41de running on a link g4 ecu the problem is when it gets warm it bogs badly when you try to accelerate. If the fuel return hose is closed of the problem stops it also stops if the vacuum line is pulled and if the coolant temp sensor is unplugged this last one causes it to run very rich with a high idle. Is there something i am missing have changed the temp sensor 50psi fuel pressure and ecu shows no fault codes. Any ideas cheers

[holeset]

sounds like fuel pressure problem?

what regulator have you got?

bogging is usually not enough fuel?

[holeset]

coolant temp sensor will be just used for cold start so will run a little rich when cold, try unplugging this and put a resistor (same value as when the temp sensor is reading hot)inside the little plug to see if this leans it out

around 250ohms at 90 degrees is pretty common

[martin t]

Thanks for the reply we think now its the actual tune of the ecu that is wrong so its getting a dyno and we will see

[holeset]

im running a link g4, although its turbo and a vh45 I could send you the tune if you like to compare?