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300D fuel starvation

Submitted by Allipp@aol.com on 18 April 2008 - 11:56am.
I'm having a fuel starvation problem on my '78 300D; it just isn't getting enough fuel when I push the accelerator pedal to the floor. I've been running it on WVO for the past 2 years. It has gotten progressively worse on power, and now it takes forever to get up to speed on flat ground and barely goes uphill at all. So far, I've replaced 3 injectors that were bad, had the valves adjusted, replaced the in tank fuel filter and cleaned the line from tank to front. I've also changed out the hand primer which was leaking air, but that didn't help either. My question is does anyone think that an auxilary fuel pump can cure this problem? Do I need a new primary fuel pump, or should I just try adding an auxilary pump first?
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What WVO system are you running?

19 April 2008 - 7:43am
admin

Knowing the system you are running with help troubleshoot the problem. When you say replaced injectors that were bad - how so? How did you test them? How did you clean them. Check other recent forum posts on testing lift pump.

I keep preaching this but nobody seems to listen. If you are running WVO the VERY best thing you can do for your engine is add an aux. electric boost pump at the back end of the system.

300D fuel starvation

19 April 2008 - 9:26am
Allipp@aol.com
I'm in Hawaii where it's warm year round, so I'm running a one tank system with a pre-heater that uses circulating coolant as the heat source, hence it isn't effective until the engine warms up. Even when the engine is warm, though, I'm having the same power problems. As for the injectors, my mechanic pulled them and looked at the spray patterns and relaced the ones that were just 'spitting' with used ones from a parts car. He tested those and said 'they had a much better spray pattern'. As for the aux boost pump.....why does it need to go at the bottom of the tank? Will it work up front in the engine compartment? That would certainly be easier to install. Thanks for your help!

check all your fuel line

7 May 2008 - 11:00pm
richard kenworthy
check all your fuel line connections. loose clamps will let air in. i couldn't even drive my car until i figured this out.

fuel starvation

8 May 2008 - 12:15pm
oldsinner111
I added a elect.boost pump in my trunk,as thats where my 3 gal. diesel tank is.My car is a monster,it will eat most new vehicles up hill on wvo.