I was told to replace cam shaft sensor.where is it on the motor

no car told,maker, mode, engine
yes many do jump cam time easy if cam belt slipped, but no engine told at all.

Well code 340 means the cam sensor is not working correctly. The engine computer is not getting the signal it expects.
The sensor and the wiring would need to be tested.

i did one and found a low fuel pressure from faulty pump housing in the tank

First I guess you meant "it would NOT start on cold days. I would not have gone to something as exotic as those fixes first. My suggestion is either a battery issue (which is quite often the case in cold weather or you have a bad main connection (either positive or ground). You can check that by a battery tester (I use my portable charger/jump start unit). That will tell you how much the voltage and current drops when you switch the ignition. How old is the battery? How many cold days a year do you have?

The next thing I would look at is the starter motor. After a decade the contacts could be oily/dirty or even oxidize creating too much impedance.

With either cause as simple drive could help things for a short period. Do you drive it everyday?

LOL, my Uncle used to use a mallet to shake things up a bit.

Good luck!
Philip

It should be located between the cam shafts. If you remove the Beauty Cover (( that's what they call the cover across the top of the motor. )) And then the Valve Cover. The Cam Sensor will be sitting between the Cam Shafts. Closer to the Intake Cam Shaft.

The cam sensor is located in the distributor.check the cylinder compression, check for ignition spark, check for fuel injector pulse and fuel pressure.

were the codes cleared after replacment if not try that
if they were test the wires for cam signal and check for damaged ---cuts---fraied---pinched

the crankshaft sensor needs to be replaced.you could have purchased a faulty sensor,

it is located below the fuel injection pump in timing gear housing..not easy to get at..1 bolt and electrical connector..goes in from behind into housing..injector pump is unit with all the fuel lines coming out of it..have replaced these sensors before

crank shaft sensor or cam sensor