Fuel pump info needed Options

[Fujifilm]

OK here goes, I am at the stage where I am going to scrap the car I am so sick of it. Have posted on another forum but had no luck so hoping someone can give me an idea.

The car is a 1995 convertible (uk) 2.0 gt manual which is the 3S-GE engine with 70,000 miles and full toyota service history.

The symptoms are, from cold it will hesitate but not always straight away, could drive half mile before it does it. When it does I can have my foot to the floor and nothing happens. Then it surges and the car will run perfectly. EXCEPT if trying to drive at 20 or 30 mph it runs rough like its in the wrong gear. Driving at 35 and above it runs perfectly, Just to add to the problem, occasionally if I reverse and stop the idle will fluctuate and stall.

Jumping the diag pins shows no faults!

So far I have changed complete throttle body with sensors from a car that was known to run perfectly.
Fuel filter, water temp sensor, air temp sensor, spark plugs, distributor cap, rotar arm, thermostat.

As far as I can tell all vacuum hoses look OK

I am stumped for ideas.

Help appreciated.
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This post has been edited by Fujifilm: Aug 28, 2014 - 2:57 PM

[Fujifilm]

After driving for a few days with the fp and B+ pins tripped out the car is 95% improved, no hesitation, I can drive at 20mph, acceleration is spot on.

So my question is what part do I change or need to look at, as far as I can tell all this has done is bypass the open circuit relay, so what have I proven or eliminated. The pump seems ok because the car is running ok. The relay only opens and closes and the car starts on the button.

If I remove the jumper from Fp and B+ it goes back to the same problem. The best way to describe the main problem is, imagine you have an auto and in first gear the car is revving but not going any faster or changing gear, then suddenly it changes gear and goes like the clappers.

Thats what mine feels like except its manual.

But with the pins shorted its right.

Any ideas?