Problems fuel supply ?

R

Rob

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Dear all,

I'm Rob from Belgium, fairly new to this forum, would love to enjoy your technical expertise.

Bought a 1975 3.0 CSi in January that hadn't been moving for +/- 10years and after some work on ignition and brakes, I did my first trip yesterday evening.

After starting the engine, I can drive for only a few miles (1-2) before he begins to judder as if no fuel is supplied anymore. When I restart the engine, I can drive again and it starts all over after a few miles.

Somebody any idea ?
Should I check the fuel supply lines (maybe they can't handle the big pressure -> driving in 3rd/4th gear ) ?

Thanks
 
Good question, haven't found out yet what triggers.

On one hand I think it's when I try to go above 2200 rpm, he kinds of sufficates/gets not enough fuel.
On the other hand it looks like the fuel which is pumped to the engine by starting makes it go for a short while, but then the fuel suplly stops....

I checked the filter : looks ok to me.

The previous owner told me he took away the fuel tank pick filter, which I still need to change....could this be it ?
My fuel pump that can run under idling but not under load ( the car actually driving ) ?
Something electronically ?
 
To all readers,
Checked the fuel delivery line Saturday : the fuel pick filter was gone, meaning that all of the residu in the fuel tank was to be picked up by the pump.

Followed the line to the pump, and that small filter was stuck with all kinds of rubbisch from tank bottom (mainly rust residu).
Cleaned this (with an ear prop as I couldn't remove it) and all solved....

Just ordered a new pick up filter ;)

Thanks for your replies
 
Glad you discovered the source of your fuel delivery issue.

Unless you purge the tank of rust and debris, replacing or installing an internal filter may be futile as it is apt to get clogged. Obviously, much depends upon amount and consistency of the junk in the tank.

Another possibility might be to leave things as they are and install an additional inline filter between the tank and the pump. A large filter (with ample filtering area) similar to that found on later models (like the E30) comes to mind. Doing this and frequently changing or back-flushing that filter might be easier than pulling an in-tank pickup. (I would guess you could unclog the in-tank filter by blowing backward through the fuel line.)
 
glad you got sorted. Good idea to take the tank out and use a tank restore kit on it. This basically cleans it and puts a coating in it which is like a new tank. That way its done for good.
 
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