I have a '95 Ram 1500 4.9L V8. When it's cold or sits for awhile it runs fine, but as soon as you turn it off after a short drive(5mi or more), and start it back up, the check engine light comes on, it usually won't start right away, won't idle or fluctuating idle, voltage drops, and exhaust smells like straight gasoline. And sometimes it i'll be going down the road and the engine will stop firing when my foots on the gas but will lurch when i let off, and the rpm's jump back and forth from about 0 to 2000, and will start backfiring at about 3000.

We've replaced the following:
Spark Plugs
IAC sensor
PCV valve
Fuel Pump
Oxygen Sensor
MAP Senor
Alternator
Coil
Engine Temperature Sensor
Coolant Temperature sensor
Throttle Position Sensor
and I think the Crank Senor as well

Codes Showing up are:
14-MAP sensor output voltage outside the acceptable range (too low or too high
22-Engine coolant temp sensor signal outside the acceptable range
23-Intake air temp sensor signal outside acceptable range
24-Throttle Position sensor signal outside acceptable range
37-Torque converter clutch solenoid CKT or park/neutral switch failure(Which i've read is not even an applicable code for trucks with specs similar to mine)
46-Charging system voltage too high

We took it to a mechanic and they didn't know what to tell us, and we tried the "key Method" for codes and they all have something to do w/ voltage irregularity. We're stumped any thoughts?

 

Welcome to DF.

You probably have a 5.9L V8, BTW. These trucks either came with a 3.9L V6, 5.2L V8, or 5.9L V8 (for 1500s, that is). There was no 4.9L engine.

This may sound dumb, but... have you checked the battery? A failing or weak battery causes all sorts of intermittent, random issues with these trucks, although it rarely causes CELs. The ECT and IAT are the two sensors I'd do next. Relatively cheap.

Its also possible you have a bad PCM, but don't change that yet. Thats a last resort.

If you have an automatic, that 37 code could be very applicable.

If you haven't cleared the codes at all since you replaced some/all of those things, try clearing the codes and see which ones come back. Its possible some are leftovers from before you replaced some of those things.

 

We've done voltage checks the battery, and its reads in the norm. and the last thing Changed was the alternator so the battery has been unhooked, resetting the codes, since the last change. And this may also sound dumb, but mind expanding on those acronyms? CEL ECT and IAT.

 

Not a problem. Just for future reference, the acronyms are in the glossary in the 2nd Gen FAQ (if you are on the main 2nd Gen Dodge Ram page, look for the link towards the top).

Check Engine Light
Engine Coolant Temp (Sensor)
Intake Air Temp (Sensor)

Sorry I couldn't help you much. I'd wait it out a few days, see what others on here have to say.

 

I'd start by checking reference voltages on the affected sensors, myself. All or most of those sensors (IIRC) get a +5VDC reference voltage, and if it's going wonky it'll cause those codes to be thrown. One or more flaky ground connections could cause problems like that, as well, but the +5VDC supply seems more likely.

The +5VDC reference comes from the PCM (Powertrain Control Module). If it's going missing or way out of range, check wiring and grounds everywhere (electrically) near it before deciding the PCM must be replaced.

 

Took it to the dodge dealer and it ended up being the Catalytic Converter being clogged up and the Intake Valve Gasket having a leak.

 

Well now that you have two of the common problems taken care of, you should be good to go for a while But that still doesn't match up with any of your codes :/