Fuelpickup problem or bad pump?
 

My car has a strage habit of loosing fulepreassure when kept at full song for some time..
The pump is delivering the right amount..
The carb is stock but with bigger jets.

Is the 84 tank usually this bad or is the pump gone?
Or maybe it just needs a bigger pump..
What do you think?

//Magnus

sounds like the pump can't keep up the amount of flow needed.

I second the notion...time to step up to a quality gerotor fuel pump like the Mallory Comp110....;)

shit, purohater all the way dawg.

you did check you fuel filter?

I only checked the flow.. that was ok..
Maybe I just should get a new pump..

thought I would check back.
If the fuel tank is rusting, these are old tanks now... you will find either much rust flakes always being traped into the fuel filter. depending on many factors you may be at the point where you get flow but the pressure is down because if the restiction. Big flakes will come up and though with the gas and be traped in the filter.if the filter is clear plastic you can see its condition. if casing is solid metal you cant, but you can take it out and check what comes out of the intake side.

Also if this car sat for a long time, the gas (petrol, I guess you call it from where you are from)will separate. you will have black gum-tar on the bottom of the tank and the remaining will be the liquid remains of the gas and water-uhhh. aside from anything else, the tar if it does not totally block the tank tube that feeds the filter-pump could be partially blocked. end result low pressure but the flow may show up ok.
If this is the case, you have to drop the tank.
belive it or not after this long you might as well
do this and inspect the inside since you are having some type of problem here. It is amazing when you inspect the whole system that you can find more than one culprit and if you fix one of the problems if may seem just fine for a while until the other untreated problems catch up with you. look for rust or tar inside or rust and pin holes that usually form at the top of the tank on the ouside.

If you need further help in how to get the tar out or how to restore the tank, email me.

regards
dennis