My 1995 grand 5.2 has had a low idle since I got it. Idles just above 0 around 200. The problem I’m curious about is when it’s warmed up and I’m slowing down the last shift is rough like a clunk. It was really bad but then I cleaned the throttle body. I can also shift to 2 just before it happens and it’s not as bad. I’ve replaced literally almost everything!! The 3 sensors in the throttle body are not mopar and the MaP Sensor failed after 15000k I have no clue what I can do now???
It runs and shifts great. Only problem is when I slow down the rpm are very low and the last shift down is around 500rpm and there is a clunk. Low idle too about 200. I can ease the clunk if i shift to 2 just before that last down shift.
Nothing is mopar.
I’ve replaced
Iac
Map sensor which failed after 15k so I put original back in
TPS
Coolant temperature sender
Thermostat
Serp belt
Radiator and all hoses
Cap
Rotor
Plugs
Wires
Coil pack
Plenum gasket
Both valve cover gaskets
Battery
Air filter
Idler pulley
PCV valve
Fuel filter
Cleaned injectors
No vacuum leaks
The iac is one of the things that should be oem. I have heard of people trying 3-4 of the aftermarket ones before getting one that works. You may also want to check the fuel pressure. If pressure is in spec the iac is the problem. You said you cleaned the throttle body but did you pay special attention to the ports where the iac is? They clog up with carbon and can cause issues.
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