You wouldn't necessarily have oil in the coolant or coolant in the oil due to a head gasket leak. the gasket can leak from coolant into the combustion chamber where the coolant would be burnt off creating white smoke and usually lots of it. It may not run much hotter than normal until the coolant level gets too low to maintain proper cooling. Are you using up coolant from your system? One way to tell if it is oil is to let it idle for several minutes and then stand back at the exhaust and have someone rev the engine and literally smell the exhaust and see if it smells like coolant or oil. Coolant will smell just like it does when it is in the jug only lighter in scent. Oil will smell just like burnt oil.

 

i know it doesnts smell like coolant then. in a way it smells like burnt oil, but it also has that nasty @$$ emissions control smell.

 

Ok that is oil you are smelling and it smells funny because it is going through your cat before you smell it at the tailpipe. It is most likely your plenum doing that or you have bad valve seals.

 

ya, like i said before it only does it when idling for a while, but once i rev it up, it goes away then doesnt come back until i let it idle for a while.

 

well, now i stil have teh asd problem, i know a few of you have said to check the crank sensor, but what else is in the asd circuit? like what else feeds into it?

 

Below is a small list of circuits that feed off the ASD:

Connected to the ASD is the Fuel Pump Module. This is the emergency shut down for the pump in case of fault.

There's many splices off that line too. One of those is Splice 138 (S138). That is where the injectors tie into. All the fuel injectors feed off of that splice.

IF there's bad or fluctuating voltage due to high impedance at the relay, well, it's not going to be stable at the injectors. Then a code is generated. The user troubleshoots and assumes it's a bad injector when, in fact, it's a bad ASD.

Also off of that same splice is S133. That feeds the O2 sensors.

The coil is fed from the ASD as is the generator.

There's so many splices off the ASD relay, that there's a lot of things that are being fed off that one device. This should give you an idea of how involved that one simple component is in the electrical system.

What I touched on above is a mere fraction of the total number of circuits involved.

 

ya, but what goes into it that causes it to trip, whats it monitor?

 

The computer controls it and kills it when it senses a fault in one of three major components: One is the CKPS, one is the CPS and one is the fuel pump module short condition. In the latter, the fuse usually blows first but, also, the PCM kills the ASD to prevent someone from jumping the terminals to the fuel pump. If the fuel pump motor is partially or dead shorted- risk of explosion is imminent.

There's two modes of failure and, one intermittent condition that affects the way your truck will perform.

If the contacts have corroded inside the relay, the contact resistance goes way up thus causing the system to draw excessive current. Then it burns through the oxide layer. In those cases, a DC spike is generated. It is bad for the system and all components that are fed off the relay see that spike. Not good for voltage sensitive components.

Then we have an intermittent failure condition: when the resistance is very high on the pins, a lousy connection is to be had thus affecting all the components in the ignition, fuel delivery system and the EFI system thus causing the vehicle to run poorly due to fluctuating voltage (due to intermittent contact).

Next up is our failure modes for the ASD relay:

- open coil in the relay: no power anytime- dead at all times. Remove and replace. No fault codes will be generated due to no power to the PCM.

- partially shorted coil: intermittent mode of operation. Sometimes the coil makes the connection and sometimes it's a partial or weak to no contact at all. Common symptoms include no starts, dies without warning, erratic electrical behavior involving the fuel system, ignition system and the EFI systems just to name the three major systems. PCM will not shut down the system but will generate errors for systems involved such as EFI or Ignition due to low voltage condition.

-Jammed mechanical mechanism: on at all times or off at all times. A code may be generated for this condition.

Components that are part of the PCM kill switch mode are as follows:

1. CKPS: cranks position sensor: if the voltage falls out of the upper and lower spec limits, an error code is generated at the PCM level. If a NO voltage condition occurs, the PCM de-energizes the relay thus killing all power.

2. Fuel pump system: if a fault is found (short condition) again, the PCM shuts it down to prevent explosion at the pump / tank component level.

3. Camshaft position sensor: only on certain models that use this component for control of the timing is this component tied into the kill switch mode.

Those are the three main ones that I am aware of but, again, you will have to get the schematics for your vehicle and map it out. If you can't read them, just bring it to a shop and have them perform a full scan on the system to see what's wrong.

Good luck.

CM

 

im gonna assume that the most common of the 3 is the crank sensor?
i found a schematic, but it goes to the computer, and thats it, with everything else thats feeds into, or off of the pcm, nothign more, its on the autozone diy site.

when i looked at it, i didnt see anything, so im assuming the pcm is loosing signal from the crank sensor, which is why i have no codes. and when it dies, all the gauges work normally, except the tach, and i know the ckp is where the rpms are read from.

thanks, i have a better understanding of the circuit now.

 

Hey, no problem. The DIY autozone schematics seem like they are missing tons of stuff as what I got from your comments.

You should at a minimum grab a Haynes manual and look at those. There's several sets of circuits involving the ASD. Better yet, go to your nearest Dodge dealer and ask them for the detailed schematics. They charge for them but, they have all the details vs. some detail or, in the case of Autoblown, no details at all.

That's not a schematic at all if all it shows is the PCM. That is more of a simple wiring diagram. Are you sure it was a "schematic" and not a wiring diagram by chance?

Well, once again my friend, best of luck to you.

CM