20 Most Recent 2003 Mitsubishi Diamante - Page 9 Questions & Answers

Try checking the wiring loom that goes on the ignition coils for humidity as your problem seems to be a humidity ingress in the wiring.

try holding down the throttle all the way when starting (thinking it might be flooded from overpumping the accelerator)

remember the computer automatic puts a shot of fuel in the car when you try to start (no need to pump)

over time age gets to the vent hoses... on some vehicles the hoses dry rot and fall apart.. on others they may just somehow come undone... only real way to tell.... *shivers... is to take the dash apart.. :(

yes you can take it to a muffler shop and either have it drilled out or replaced. They are bad when they are clogged, so if you are in a state that requires no inspections then I would just have it drilled out to unclog it. it's a whole lot cheaper than the dealer is telling you.

You don't state what year the car is. If it is a newer model, you need to get the OBDII codes read by a technician. Then, you will know what the problem is. My money is on an oxygen sensor or mass air flow sensor but it could be as simple as getting a new fuel filler cap.

you can go to a salvage yard and find wrecked cars like it even the galant has the same reservior and find the diaphram chances are they won't even charge ypou for it.. good luck please rate this..thanks

You say that it attempts but fails. If it turns over, at a normal speed and tries to start and doesn't, check that the fuel is good and new fuel. Not fuel that has been in the tank for a long time. Check the fuel filter to see if it is clogged, Check the fuel injectors to see if they are all spraying fuel and there is enough pressure in the fuel lines. Check fuel pump for proper fuel pressure. High mileage engines check for compression in each cylinder. Possible bad ignition wires or ignition timing is off. Has the engine been steam cleaned recently. Is there water in the fuel? This gives you some things to check. Good luck.

what year

The barrels don't come out of the key lock assembly. It will be far simpler, easier and cheaper to get a new barrel and key from the dealer.

https://s8.postimg.org/p4gzjf8np/starter.jpg Click on the link. I don't know what kind of problem your having or what testing you have done? Your security system can effect your starter motor and other components as well. If the security system has a problem, cranking the starter motor will not let it start, because most systems also disable the fuel injectors as well. We can always jump something or bypass just to see if starter motor will crank the engine, but, if security issue, it won't help. Just my opinion. There are safety issues with jumping or bypassing something. Safety is your responsibility.

The panel is held on with screws and then once they are remove there are plastic "Christmas tree" retainers you need to pop loose.

low battery voltage =old battery alternator regulator stability suspect light and or fan relay to check

Mitsubishi Montero 3.5 V-6n24 valve Looking from the front of engine to the rear on the passenger side 1-3-5 Looking from the front of the engine to the rear on the drivers side 2-4-6 The engine has coil over plug with coils only on the drivers side. The spark is shared via spark plug cables to the plugs on the passenger side. So If you are replacing the spark plug cables: #2 cyl.coil drivers side shares spark with #5 passenger side- #4 coil drivers side shares spark with #1 passenger side- #6 coil drivers side shares spark with #3 cylinder passenger side.