Hey Guys. I am having some ignition problems with my 1990 Montero 3L. When the engine is cold, it will not start. Starter spins the engine perfectly, seems like no fire. After bumping the starter 10-15 times it will usually fire and then die. Hit the starter again and she stays running. All the conections under the hood seem to be good. Once everything is warm, no problems starting. Searching the posts, came across 2 potential problems: Key switch or ignitor in the dist. Any help would be appreciated.

That could certainly be an ignition problem, but it sounds more like it's fuel related to me. First, check to see if you have spark at the plugs when it won't start. If you don't know how to do that, say so and someone will help you.

Frank

Wow! Haven't even thought of fuel problems since it runs so good once you get it started. Something else to look at. Thanks.

Looks like you are right Frank. I appear to be getting fire. Where do I start looking for the fuel problem? Fuel pump?

Check the voltage at the fuel pump - should be 12v or nearly so. If you don't know when the fuel filter was replaced, replace it now.

There's no easy way I know to check the fuel pump..... our trucks really need a test port on the fuel rail.

On the off chance you have a sticking/fouled injector, you can try running some injector cleaner through the next tank of gas and see if it improves things. I'd recommend BG 44K if you can find it.... if not, use Techron.

If your problem is indeed fuel related, I think it's the hardest thing to diagnose and prove on our trucks.

Oh, check all of the vacuum lines, but particularly the one that plugs into the fuel pressure regulator (on the rear of the fuel rail - passenger side).

Frank

Thanks again Frank. Oh, sorry to ask all these questions, but is the fuel pump in the tank? I don't have a manual yet.

Yes, it is. PM me your email address and I'll send you the fuel section from the FSM.

Frank