yes we have spark and fuel at the cold start valve trys to hit but will never take off. wont even run with a little dab of either. do you know what part no. is on the intake vacuum schematic it is listed as item #100 has vacuum line and i wire to the divice grounded thru the block or intake? my buddy says it is a vacuum problem i say it can be started by bypassing all the electronics except the coil circuit spray a little gas into the plenum and it shold run for a few seconds. i have done this to my 77 450sl, any help will be greatly appreciated. a block diagram of trouble shooting steps would be nice.