924Board.org

[leadfoot]

just found this info on www.fueltech.com.au
HOT START PORSCHE
Surprised to find the other day with a Porsche 924 KJetronic fuel system, that in order to save money, someone had decided to unsuccessfully mix & match pressure regulator plungers & slides in the fuel distributor head (FDH) from other cars to get the desired pressure - a real NO NO. Of all the KJet systems to work on, I've always found the 924 the hardest to achieve easy hot start. This slant 4 engine has very low manifold vacuum during hot cranking and will not deflect the plate sufficient to inject fuel. Whether they like it or not, under hot cranking conditions the driver must depress the accelerator pedal to allow what little suck there is to deflect the plate. That's even in the owner's manual, but the poor dears do get confused between hot & cold cranking. Don't take short cuts, take all your pressure & flow readings first. Talk to the customer, ensure he is willing to pay, and then take your time to do a top job - the customer will be so pleased..
Do turbos suffer the same problem?? or if you go by this have better vaccum at idle due to chamber design..??
leadfoot