Dodge Ram Van

Try cleaning the battery cable connections of corrosion.

Look on the bottom of the hood on the emissions sticker. It'll say the engine size and spark gap. Typically it'll be 0.035" for the Magnum engines

The distribution of the heat and air conditioning is controlled by vacuum. I have had two Dodge vans and under hard acceleration, the lack of vacuum to the blend door causes the distribution of air to become mixed up. A spring closes the door door when there is no vacuum. Engine vacuum is used by the heater control to tell the blend door what position it should be in. I don't know if this is just a quirk of the Doge vans but you may have a problem in the vacuum system if this happens randomly.

always, the problem is either fuel or sparks. test to see if your getting good sparks from each plug wire and plug. also pull off a fuel line at different stages to see if its blocked. once you answer "fuel or spark" then you can better diagnose your issue.

Dodge does not use inertia/reset switches.

Normally yes.

Inside the alternator.

Inside the alternator.

On my 96 Ram Van 3500, it is the Glove Box, The Relay Fuse Box is under the hood.

the fuel pumps good on a 1991 dodge van B250 but wont turn over is the relay the only thing needed to be check?

Check fuses

Check brake lights

Check the upper end of the brake pedal under dash area- -some have a "Vacuum Dump" switch similar to a stop light switch as a secondary safety

Check the adjustment and operation of this switch

No, you have to remove the tank to access.

Dodge does not use inertia/reset switches.

in the ownwers manual

If it has a 5.9 the only transmission it can have is a 46RE.

13-14 miles per gallon, assuming 4-speed

in the heater box behind the dash on the passenger side of the truck you have to remove the dash to get to it

OEM equipment modifies the audio from the radio, sends it to the speaker and converts it back to normal audio on the speaker frame ckt board. To put in an aftermarket radio, use two of the wires and connect up to your new speakers and radio to make use of OEM wire routing.

P1492 (M) Ambient/Battery Temperature Sensor Volts Too High Battery temperature sensor input above acceptable range.

Most likely you have a serpentine belt, one continuous belt that drives the alternator, power steering, air conditioner compressor and there shoudl be one more pulley. It is usually the smallest pulley, it is called an idler pulley. It is spring loaded. You need to get a ratchet, and an extension, usually 3/8 drive and put the end of the extension into the front of the idler pulley and either push or pull to take tension off the spring. This will allow you to slip the belt off the alternator pulley. The slack will be very minimal. Once you get your alternator back on you will once again tak ethe tension off, loop the belt over the pulley on the alternator and then let the idler pulley take the tension up on th ebelt making it tight. If the serpentine belt falls off all the pulleys, you need to route the belt back onto each oulley in the designated manner. If you DO NOT see a belt diagrahm on the front radiator support, then make a drawing for yourself so you know how th ebelt loops over each pulley. Both sides of serpentine belt touch pulleys so the belt is not like old v belts that can only go one way.

Support the engine with a jack and a block of wood against the oil pan. Lift it slightly to take the weight off the mounts. Unbolt them and put the new ones in.

It is either 26 or 35 gallons. If it is a long bed it should be 35 gallons.

Most likely the blower resistor has failed. It is located under the hood in the side of the heater box.

Inside the transmission on the valve body.

You would need to be more specific with your question. You are not providing enough information to supply a meaningful answer.