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Hello all! I’m new to the forums. I’m having some issues with my truck and I’m hoping for some advice/help?
I have a 1997 Dodge Ram 1500 w/ 131K miles, 5.2L, V8, auto., 2wd.
Upon initial start-up (when the engine is cold) the engine will rev’ to 1600 rpms and down to 1200 rpms for about 20 to 30 seconds, this is when it’s 60 F or below. When it’s warmer the engine will idle at a constant 1000 rpm’s. When you lightly hit the accelerator the rpms will jump to 1600 down to 1200 up to 1400 and down to 1000 and steady- this will happen until the engine warms-up and the idle is about 700. When you go to shift through the gears – the idle will jump to about 1400 when going into neutral or park (again until it warms-up). When going from reverse (as I back out of the drive-way) into drive the engine will die. Upon start-up it will run just fine and continue running fine all day. I do not get any CEL’s. This routine happens every start-up.
I’ve checked the TPS and the MAP sensor recently, they both came up OUT of specs according the the repair manual. When I checked the 2 sensors listed above I got a code for the TPS (24) and O2 sensor (21). I think that had to do with me disconnecting and checking the sensors as I’ve since cleared the codes and they have not been back. I’ve checked for vacuum leaks with carb. cleaner and a hose to my ear – no luck.
Should I replace the 2 sensors or at least the TPS. Or is there another issue as the truck seems to run fine after it warms up.
Sorry for the long winded question. Just wanted to be thorough. Can anyone help? Thank you.
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