Volvo: Volvo, fuel pressure gauge, fuel station

Question
I have a 89 740 GL and I started it up one morning and it started at high idle... I waited a few minutes and it wasn't going down.. so I waited a few more minutes & it seem to go down some, so I put the car in drive and drove to a fuel station. I turned it off, filled it up, then turn it back on and it started fine (without the high idle) but the "check engine" light came on for a few seconds. a day later, it seem to take a little more time to start then the normal starting. I actually had to turn the key three times for the car to start but it started... now yesterday my car wouldn't start at all... and then it just wouldn't do anything.. it seem like the battery had died and it just wouldn't start. (it wouldn't make the "crank" noise either) I waited a couple hours later & tried starting it and it took a few seconds but started.. so I took it around the block and parked it at home, turned it off and turned it back on and it started normal. I have notice that it has started to loose some power when starting and sitting at red lights it sometimes sounds like it wants to turn off but one you press the gas, it seems fine. now today, I cannot get it to start.. it sounds like it's going to start but doesn't. .... have any suggestions?

Answer
Joel,
Yes have the battery and charging system tested. Attach a fuel pressure gauge to the engine and make sure that there is fuel pressure (42 psi). Your car should have both a main pump and intank pump be sure that both are working. Test the fuel filter for blockage, or just replace. During the testing you will find what things are working and what things do not. Read any fault codes that are stored and take care of those faults. If the spark plugs are wet either try to dry them off or replace them. If the engine was flooded and not creating enough compression you may have to add a couple of squirts of oil to each cylinder to oil the washed out rings. Look at the timing belt align the marking to be sure that it did not jump time a tooth or two.