<img src="/forums/images/graemlins/scared.gif" alt="" /> Get rid of that. I wouldn't run that through my lawn mower <img src="/forums/images/graemlins/barf.gif" alt="" />

You probably want to start here. This is the factory diagnostic manual. Read the section on drivability tests.

http://www.mitsubishilinks.com/fsm/raider_fsm_1989_powertraindiagnostics-30l.pdf

A DRB-II is the factory diagnostic tool. With it you can...

• check the injector circuits
• check the o2 sensor
• check the engine temp sensor
• check the air flow sensor sensor
• check the engine rpm
• check the air temp sensor
• check throttle position sensor
• check the crank angle circuit
• check the air pressure sensor
• check the fuel pump circuit
• check the EGR temp circuit

Here is a Great link with lots of pix of the drb2 and MUCH more!

DRB-II INFO


<img src="/forums/images/graemlins/kewl.gif" alt="" /> <img src="/forums/images/graemlins/kewl.gif" alt="" />

I was looking under the Montero where I saw the fuel leak which went from bad to horrible. I never knew a fuel line sheds its skin <img src="/forums/images/graemlins/scared.gif" alt="" />. What was left was a spongy mess of rust <img src="/forums/images/graemlins/barf.gif" alt="" />. I bought some injector hose and new 5/16thmetal line and replaced the 3 foot section of bad. I have to say it smoothed everything out quite a bit. Still ran like crap but I swapped Mass air sensors from a spare intake and it smoothed the whole thing out a great deal. I still have a check engine light and some shaking but its almost night and day compared to how bad it was. I still have to dump the old fuel before I can really see a difference I think.

Sorry about the delay in getting the DRB-II on it's way. It is all boxed up and ready. I just need time to get it to the post office when they are open. I'm in a LP Fire Control class this weekend. I should have it on the way on Monday morning.

Thanks for offering me the DRBII Mark. I am not sure if I need it anymore though. I was fiddling with the Montero and tore the intake down and reseated the fuel rail. After about 3 minutes of running the Check Engine light blinked off and the engine smoothed out. Still shakes a bit, but its almost like it should be running. <img src="/forums/images/graemlins/kewl.gif" alt="" /> I still have the shaking to deal with, and a mystery coolent leak has shown itself. Also a few corrosion gremlins are needed to be dealt with. But aside from that its running like it should... I was wondering if the ECU on the 89 Montero had a memory on it that would store an error code and keep it running poorly for a while after solving the problem?

Nice!! <img src="/forums/images/graemlins/kewl.gif" alt="" />

i have to replace fuel lines pretty often on both of our motorhomes' generators. cures the rough idling and shaking just about every time. i didn't even think about that for your problem. it might help me with my own little raider's rough idling a bit, as i've got a separate thread about that here somewhere. i'll go check it now. jack b :-)

I would try replacing the fuel filter before replacing the lines. This truck sat for over a year with road salt on it from the poconos. My 89Raider still has clean rust free lines because I wash the underside once a month. <img src="/forums/images/graemlins/kewl.gif" alt="" />