lower voltage at fuel pump - 2.0 djet 1974 Options

[dax1969]

Morning,

I have a 2.0 djet fm 1974 with a complete rebuild engine. Wiring harness, plugs, injectors all new. 123 distributor with fixed curves, currently running at curve 2.
TPS board new and properly adjusted. CHT sensor is new. Broken thermoswitch so cold start valve is not connected.

Engine starts everytime, cold and warm - no issue
Steady idle
First kilometers car does not run very well, much beter when warmed up.
Once warm I have the occasional hickup at 3000 rpm while steady cruising.
Distributor is set at 27° btdc

When I compare to other 914's I've driven fm friends I feel like I am missing some power. It feels like engine is gasping for air or fuel at higher rpm ? (difficult to explain a "feeling")

All in all you good say, car runs fine ... but being a nerd I am still looking for better performance (IMG:style_emoticons/default/biggrin.gif)

I measure 14,3 volt at the battery but only 13.12 volt at the pump (located near steering rack). Could this voltage difference cause the pump to run slower giving less fuel pressure at full load ? the occasional hick-up ? The lack of "smoothness" ?

What to do to now ? Leave it like it is or trying to get more voltage at the pump ?

I cleaned up the relay board and relay sockets
I will replace the 25 amp fuse
I will clean the ground wires under the relay board
I know I should measure fuelpressure while driving but at idle it measures 2 bar

some suggest to put additional ground closer to the pump
others suggest to run new wire from battery to pump ?

thks your help
krgds
Dax

[emerygt350]

29 psi for the fuel pressure. That hiccup sounds like a worn TPS. A bad spot at cruise results in a complete cutout of the fuel system.

Why do you have the 123 set on 2? You might want to try 0 or 1. Do you have the advance hooked up and if so, where is the hose routed?