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

[Timothy]

Did you ever retard your timing?(distributor). This can cause a rough idle. A dirty throttle body and intake manifold can do the same. That's good there are no vacuum leaks. Where you live it must be cold. Driving a car til it runs out of gas is bad. You can overwork the fuel pump and burn it out since it is not pumping gas. Let me know if your problems persist. And maybe a coolant temp sensor? It may be defective and telling the computer that the engine is already warm. The computer is supposed to add extra fuel when cold to "choke" the engine until it reaches operating temp.

This post has been edited by Timothy: Aug 10, 2014 - 7:05 PM