My wife has a 98 RAV4 that has been having some sort of fuel starvation problem (we think) on/off again for the past year or so.  It happens most frequently when it is really cold outside, or at least in the morning when the engine has been sitting for a while.

Car starts, and continues to run as long as she is giving it gas.  As soon as she lets up on the gas, it dies.  This happens once every 3-4 months. 

About a year ago, we had what seems to be a related problem where it was completely starved of fuel and woudl either be under powered or die completely.  At that time we replaced the fuel filter, plugs, and wires then to get a good baseline.  This seemed to help the problem some.

I'm thinking fuel pump, and my description of the problem probably favors that pre-diagnosis.  Any suggestions on how to proceed with the diagnosis?  The intermittent nature of the problem is driving me nuts.

Craig

Craig- I think you're on the right track. Also possible throttle position sensor.
Below refers to 22RE motors mostly yet may be applicable to yours as well.

http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

Where's the best place to get a Toyota manual and aftermarket parts?

I don't *EVER* want to hear that Land Rover parts are expensive from a Toyota guy again... the workshop manual was 2x what my Land Rover manual cost me.  Granted, the parts my be worth it since they actually last a while. 

TRDparts4u.com

Craig- I only know of a few Toyota truck FSM (Factory Service Manuals) online- at places like: http://www.ncttora.com/fsm/

I do not know of any for the RAV, some cross over may exist. I have no knowledge of the RAV at all. Sorry!

I have not used it but for $10 you can get temporary access (24 hrs) to Toyota Repair Manuals.

TIS

You might want to take a look if nothing shows up on ebay.

Any OBDII based vehicle will have the same set of emissions related sensors. The 98 Toyota and 99 Land Rover work exactly the same way w/ regard to sensors. There aren't any codes being thrown right now, so it isn't an emissions (OBDII) related problem. Toyotas and Land Rovers use the same OBDII protocol, so I can and do use the same ISO OBDII reader on the Toyota as I use on the Land Rover.

I think there is a misunderstanding related to Land Rover. Land Rover engines are simple vehicles. The basic engine design is from a mid-60s Buick. The Land Rover is easier to work on because there is so much more room under the hood. You can fix a Land Rover engine with nothing more than a manual and a code reader too.

Craig