Chrysler with a wiring problem!

[8thTon]

Wait - ignition coils lost ground to block, making ground to battery/fuse block instead. Spark current flowing back to block though ground connection you're trying to measure.

 

[Dirtman]

New battery in, no change. Intermittent rough running and the "auto shutdown relay" goes nuts during that time. Clicking on and off like a fuel injector a million times a second. Whatever is wrong is in that circuit. Its literally just killing the engine on and off fast to make it seem like a miss but not going through anything to cause a code because the computer is just seeing the engine cut on and off hyper fast.

Power to that circuit is going nuts.

 

[adsm08]

What year is it? MCA vehicles have issues with what amounts to the equivalent of Ford's Battery Junction Box.

 

[adsm08]

 

[Dirtman]

What year is it? MCA vehicles have issues with what amounts to the equivalent of Ford's Battery Junction Box.

07 grand Cherokee. The relay in question is in the engine side power box or whatever the hell chrysler calls it... i unclipped that box and was wiggling that thing and swore for a second it would run fine sometimes during my wiggles but nothing definitive. I gave up for the night and started drinking heavily. My plan tomorrow is to pull the pins from that box and go direct to a relay for whatever the asd is. No ones made clear what an asd relay is yet...

Wtf is auto shut down... dont auto shut down, thats what a key is for? God i hate Chrysler.

 

[adsm08]

The ASD relay is a failsafe device. If the "logic module" (guessing SJB or PCM) sees stuff getting out of whack it triggers the ASD and kills the system.

If the relay itself is getting weak it can cause issues. Also, apparently a fault in the fuel system controls, so the fuel pump relay or the pump itself can cause a triggering of the ASD relay.

Automatic Shutdown Relay

Automatic Shutdown Relay by Bob O'Neill and Bob Lincoln The power supplied to the fuel pump, ignition coil, fuel injectors, and parts of the power module is controlled by the logic module through the Automatic Shutdown Relay (ASD); the idea is to shut off fuel pressure and the ignition...

www.allpar.com

This is a little earlier than most of the Chryslers I have dealt with. Most of them had failed/failing integrated fuel pump relays.

 

[Dirtman]

First thing i did was throw a new relay at it when I found it clicking a million miles an hour. Ill look closer at it in the morning. There's definitely a voltage issue going on since the alternator wont come out of overkill mode. I did the battery and at this point really tempted to just throw an alternator at it too... the old battery was oddly swollen so maybe the alternator has been overcharging the crap out of it for a while and possibly damaged some other stuff along the way?

 

[Ranger850]

Title could have just said "Chrysler".












Car is goes 42

 

[1990RangerinSK]

Best solution: Sell that <censored> Jeep and buy her a 2007 Ford Explorer. Problem solved.

 

[Dirtman]

Quiet down you...

 

[1990RangerinSK]

Quiet down you...

No. That really is the BEST solution. Explorer is a MUCH better vehicle. She'll thank you later.

 

[Ramcharger90]

Doesn't a damaged computer cause this in the commanders and patriot? I remember a friends was doing this I think and it needed a new ecu

 

[Ramcharger90]

The positive wire may have corrosion behind the plastic coating.

 

[97RangerXLT]

to paraphrase the original poster...

Engine is go vr..vr..oo *gasp**shudders**die*

AJ

 

[PetroleumJunkie412]

to paraphrase the original poster...

3.0 is go vr..vr..oo *gasp**shudders**die*

AJ

FIFY