have been having for a little while now with a problem with my boost.

This is what happens I can not boost past 1bar, as soon as I hit one bar the car judders like mad and the boost flickers between 0.98bar to 1.02 bar and just keeps doing it even if I keep my foot down.

My air fuel gauge during this if going from rich to lean rich to lean etc

Happens both in prime and secondary.

I have changed coil packs & Prime Solenoid.

Next on my list is Fuel pump and filter.

Is there anything else that could cause this?

 

Hi, what mods have been done??

 

Nothing so far.

 

Have you cleaned out the solenoid box?

 

Yes I brought a refurbished box when I 1st got the car 11 months back.

 

have some other problems with the car which may or may not be related

The engine rev hangs for about 10 secs when coming to a stop
Cold start is a problem when start car the revs are around 1400rom and drop slowly over 5 mins but when It drop is drops below 500rpm and idles there if I adjust the idle control valve to say 700rpm its all good till I turn off the car and it goes back to under 500rpm.

But when the car is warm say after 20mins driving the car idles great 650-700rpm

as said dont know if this is related

 

water temp sensor maybe, air leak. You had the intercooler off?

 

I have replaced the water temp sensor

Yes had intercooler off but have double checked all lines etc