Help needed!!!
Administrator
Joined: Apr 2010
Posts: 87,395
Likes: 4,213
From: Clayton MI
Check your ground and make sure you're getting the proper voltage from firewall as well as engine. If you have an aftermarket stereo system it is necessary to upgrade the ground wires to a minimum of 4 guage. This is my second Dodge to give me an electrical problem with aftermarket stereo( amps and speakers) the first a Dodge van added extra battery then suddenly van won't run. Hundreds of dollars later, I remove battery and van runs fine. Just recently my 98 Durango would shut off. Start randomly after sitting for a day or so and finally to start only if I stepped on the pedal to the floor while cranking. Sometimes, sometimes not. After doing a well needed time up. So one day just connected multimeter across battery. 11.? Volts. Connected negative to firewall ground. Much lower than 11 somewhere around 5 v. I didn't replace. I added an additional 4 guage from battery to firewall. Hope this helps any and all Dodge owners who have trouble with their car or truck not starting. Even the no bus because that showed up on me too during that period. Truck is running quite well now. Thanks for reading. Hope this helps at least one person
Registered User
Joined: Jul 2021
Posts: 1
Likes: 0
From: North Carolina
Hiw I can reset mi PCM? Please help I have the p0545 in my 98 dodge Durango
Incorrect,
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR—3.9/5.2/5.9L ENGINES—PCM INPUT
The MAP sensor reacts to absolute pressure in the
intake manifold. It provides an input voltage to the
powertrain control module (PCM). As engine load
changes, manifold pressure varies. The change in
manifold pressure causes MAP sensor voltage to
change. The change in MAP sensor voltage results in
a different input voltage to the PCM. The input voltage
level supplies the PCM with information about
ambient barometric pressure during engine start-up
(cranking) and engine load while the engine is running.
The PCM uses this input along with inputs
from other sensors to adjust air-fuel mixture.
The MAP sensor is mounted on the side of the
engine throttle body (Fig. 7). The sensor is connected
to the throttle body with a rubber L-shaped fitting.
(It is actually mounted right up front on the TB when you open the hood facing the front clip.)
Anyway, I think your problem is a combined issue,
Do a tune up with cheap Champion Copper spark plugs gapped at .040
Replace the wires with dealership OEM wires or Mopar performance, or MSD 8.5mm Red.
Replace cap and rotor.
Clean the Throttle Body and IAC.
Clean the MAP.
Reset the PCM.
If the engine is running hot especially going up hill it could be a plugged CAT or a trans filter, fluid, and adjustment replacement.
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR—3.9/5.2/5.9L ENGINES—PCM INPUT
The MAP sensor reacts to absolute pressure in the
intake manifold. It provides an input voltage to the
powertrain control module (PCM). As engine load
changes, manifold pressure varies. The change in
manifold pressure causes MAP sensor voltage to
change. The change in MAP sensor voltage results in
a different input voltage to the PCM. The input voltage
level supplies the PCM with information about
ambient barometric pressure during engine start-up
(cranking) and engine load while the engine is running.
The PCM uses this input along with inputs
from other sensors to adjust air-fuel mixture.
The MAP sensor is mounted on the side of the
engine throttle body (Fig. 7). The sensor is connected
to the throttle body with a rubber L-shaped fitting.
(It is actually mounted right up front on the TB when you open the hood facing the front clip.)
Anyway, I think your problem is a combined issue,
Do a tune up with cheap Champion Copper spark plugs gapped at .040
Replace the wires with dealership OEM wires or Mopar performance, or MSD 8.5mm Red.
Replace cap and rotor.
Clean the Throttle Body and IAC.
Clean the MAP.
Reset the PCM.
If the engine is running hot especially going up hill it could be a plugged CAT or a trans filter, fluid, and adjustment replacement.