Question about 1998 Dodge Ram 1500 4WD
Replaced both O2's, replaced plugs, wires, cap and rotor. Replaced injectors, checked for vacume leaks, checked for intake leaks. Replaced throdle control module. Still getting P0171 code and misfire codes and truck runs for a couple days , then like a light switch the check engine light goes on gives me a list of codes,and runs like ****. Truck won't go 1/2 mile down the road, top speed is about 20 and thats down hill. Next going to replace MAP sensor. After that I'm gonna find a cliff and a brick!!! Any help I would REALLY appreciate it! Thanks!!
I have a similar problem. I'm replacing the fuel pump and might get an aftermarket coil. The coil on my 5.2L Dakota is right behind the radiator on the front right side of the engine. Stupid spot! I'm surprised it hasn't melted!
Posted on Jun 16, 2009
Sorry I had company show up & couldn't get back until this am.
On yours, you leave connector on at TPS, and with key on, not running, use voltmeter at center terminal. At idle it should read more than 200MV. At wide open throttle (WOT) should be less than 4.8 volts. Also should increase gradually as you open throttle, any drop off, or large fluctuation indicates problem, as long as your smooth doing it. If not within these voltages, or jumps up & down, drops off, replace it. You still should be able to do same with ohmmeter & harness disconnected, and connected at 2 of the pins at sensor. (it's a potentiometer) Increase & decrease same rules & smooth. If doesn't work at one set of pins try different combinations, or ground & one pin.One way or another you should find the right combination to get a reading in ohms.
Posted on Apr 16, 2009
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Posted on Jan 02, 2017
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are the codes start with the basics inspect plugs wires cap rotor and if all checks out do a compression test
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