Speedometer went all the way around clockwise when starting

Amazing.....At this very moment in time.....my 2000 silhouette is doing the same thing....if you were unaware.....ventures Montana's and silhouette are from the same mold. Very similar in all aspects. My diagnostics have got to the fuel pump part of suspects....but I have already checked filter, relays, fuses and ignition electronics....my latest suspect is the pressure sensor that monitors the pressure of the gas tank....there is also a pressure sensor on the injector rail I'm suspicious of. I'm going to find out how to place each sensor in "okay ....fuel pump turn on and pump fuel to the throttle body" to check them. In my case....I don't smell any gas after turning the engine over....trying to start it.....sometimes for over an hour....never any gas smell....so I suspect fuel delivery is the problem. The fuel pump has several sensors that control whether or not it needs to run....and pump gas. I can hear my fuel pump run for 2 or3 seconds when I turn the ignition to the on or start positions.testing all of those sensors is my plan of action for this 3 day weekend. Your on track with your work and suspicion of the position sensors......vacuum leaks will follow the sensor checks. Vacuum leaks could cause a couple of sensors to fail too.....I dropped my fuel tank last weekend....and found the fuel pump to be in working condition.....I removed my fuel filter and punched a hole through it for free flow.....to eliminate it from the list...after checking the vacuum angle....I will move to the electronics side.....with the ignition switch first and the transmission position indicator switch following.....I've plugged my trouble code reader in and didn't get any indication of any failed electronic devices......my problem and your problem seem to be very similar, except that I am doing all of my work on the van myself. I will try to keep you informed of my diagnostics through fix it.it would be nice to know how yours is advancing too.....there are a few directions you can progress into.....hope one solves your problem....if not.....there will be more ideas to come....until I solve my problem....good luck to. Us both and onward we go......Nick.ps couldn't spell or grammar check because I'm using my phone to compose....and the typing pad covers the entirescript being typed. Sorry for any problems. Associated

y u r in the van with door clased hold down the trip button till u c the gages all move when they start moving let the trip button go if it moves it should start moving again. i tryed this when mine went all the way around n got stuck n its working now. good luck

That sounds like a starter issue. If the engine is clicking when you turn the key on it will be starter. If there is nothing when your turning key on it's probably battery or solenoid issue. Solenoid for starter is located attached to the side of your starter.

I have helped many Honda/Acura owners on this issue. Many mechanics will replace many parts prior to solving this problem, which then creates unnecessary repairs and spending. So here is my diagnosis: Notice if your speedometer drops to zero when your engine dies while driving. If this happens its your ignition switch failing. Ignition switches in Honda/Acura vehicles years 97-02 encounter faulty or shorted internal contacts. This causes premateur electrical failure to vital engine electrical parts, causing vehicle to stall intermittedly. A recall has been in place since 2002, approximately 1.3mil vehicles are affected, call your local honda/acura dealer for info and possible free repair or replace the ignition switch yourself. Hopefully my info helps you!!

it deffanitly sounds like either a starter or battery.
dont let the lights come on fool you if the voltage isant there it wont work.

your alternator most likely went bad and you were just driving on battery power with out the alternator recharging back the battery when your voltage drops to around 7.5 volts then the van will die please dont try to drive home with out fixing alternator.

Honda is notorius for bad MAIN RELAYS the solder in them crack and can not be seen with the nacked eye. This is due to simple expansion & contraction the solder heats up & cools down. Try that.

http://www.youtube.com/watch?v=HPvX190txvk

Make sure you have installed the battery correctly red cable on the (+) and black cable on the (-) side sounds like it may be reversed this wold cause instant battery drain.

12 - battery recently disconnected. 21 - Oxygen sensor signal doesn't change (stays at 4.3 - 4.5 V) possibly bad O2 sensor 37 - Transmission temp. sensor reading low.
There are many options that can cause these problems, but loose wiring to the battery and a weak alternator would be one of the first things to check.