I have a 1999 suzuki vitara and my problem is whenever i start the engine, it doesn't start at the switch of the key. I could hear the fuel injection working, but i have to crank it few minutes in order to start. When i put in drive, the engine stops on and off when i push the throttle. two front door locks don't work except for rear doors when i use drivers side buttons. What should i do?
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The engine in this car is controlled by computer, so the first thing you must do is have the computer scanned for fault codes, once you have those codes (if any) you can begin diagnostics to find the root cause of the problem. You will need both a passive scan test (key on engine off) and an active scan test (key on engine running) due to the fact this is an idle speed control problem.
You don't say if its manual or auto? Looking at its age its possible the emission control valves/hoses may be blocked and it just needs a full service and these things checked by a trained person. Check the service periods and go from there. It may be that if all is correct then a person with a screwdriver is all it needs.
Have you ever had your timing chain replaced? If not, then most likely your timing chain is getting loose and starting to tap on the sides of the housing. This is normal after probably 110-130000 miles, so you may consider this. DOHC engines don't have the lifter tapping problems that pushrod engines have. The reason you only year the timing chain tap at idle and when warm, is the metal expands when it warms up, making the chain slightly longer. At idle, chains and belts "flutter," or shake back and forth. when the engine speeds up, it puts more tension on the chain and it stops.