I have a "92 240 that's been drivin me crazy for years. It's very hard to start when cold, runs pretty well when it's warm, but still stumbles on acceleration and hesitates just a bit at highway speed. If I hold the accelerator in, it won't start. I have to pulse the throttle to get it to start. If I leave my foot off the gas, or hold it in, it dies. I have to keep pulsing the throttle to keep it idling. When I can get it to about 2500rpm it runs well. If ambient temperature is about 60 or colder it is impossible to start. It is an LH3.1. I've tested everything I can think of, and replaced a lot of parts. I even replaced the ECU. I know it's a fuel problem, because if i squirt some gas into the throttle body, it will start just fine, and run until that gas is gone. The problem started shortly after I replaced the throttle sensor. It seems to run a little better with the throttle sensor unplugged. I've tested the throttle sensor and the wires to the computer. Everything seems fine. Fuel pressure is good. I'm about ready to sell it because I've just run out of ideas. I'm hoping someone on here has encountered a similar problem and can help me out.