Topic: Problem with the Jeep

[grumpygy]

Think I have good fuel pressure as it blows my gage off the line.  Will see about a new gage with better fitting this after noon.

[grumpygy]

   Ok another question this time about codes if the auto shut down is kicking is would that not stop the codes.  Meaning without the ECU none would show.

[grumpygy]

At the check point on the inj manifold I have right at 38  but only with a brief run time and the  engine then shuts down.  Vac line was still hooked up   and I'm running the Hesco adjustable fuel pressure regulator.

[Jeffy]

So does the engine start the first time when it does start?  You mentioned releasing teh parking break and it going rough but does releasing teh break actually do anything?  How long does it take before the idle goes rough?  Have you tried disconnecting the TPS and IAS seoerately to see if there are any changes?

So, you're not getting any codes at all?  You should be getting a 12, 33 and 55 at minimum.

If you think it's the ASR then you might check this: http://www.allpar.com/fix/codes/sensors/auto-shutdown.html

[grumpygy]

The engine will start  and only run a few seconds then shut down.   

When I released the parking brake when this all started the engine shut down not run rough just shut down like the key was turned off and did not restart till that night when I got back home but onluy for a few seconds.

If I turn the key to run and do not try to start the you can hear the auto shut down kick in.

If I try to get the coded by turning on and off the key the check engine light never comes on.  never flashes anything.  But does work when 1st turning on the key so the bulb is good.


I read today one of the grounds is hooked to a mounting bolt for the emergency brake.  May look at that tonight.   It now does not run long enough for me to release the brake and see what it does.

[grumpygy]

Ok got a code reader and had 3 codes

33 which I knew about.

42 ASD relay voltage

47 Charging output low

[Jeffy]

So the ASD is reading low voltage and it's triggering the ASD relay.  You should be able to check the voltages with a multi-meter.

[grumpygy]

So the ASD is reading low voltage and it's triggering the ASD relay.  You should be able to check the voltages with a multi-meter.

But what does that tell me.   Everything I read points to fuel pump.  Which I will have today.

[Jeffy]

That would have told you if the problem was with the fuel pump or the ASD relay.

[grumpygy]

The relay seems to be working fin since it is tripping and shutting the engine down just like it should.  I did order another relay when I ordered my fuel pump that will be waiting on me when I get home.


I thought it was low voltage being fed to the relay that caused it to trip.

[Jeffy]

Low Voltage or Intermittent Voltage...

[sharpxmen]

alternator going bad would not blow your fuses, as an example a dead battery and a high output alternator (>100Amp) would (assuming both  fuses were fine or in place when it happened and not just one 50Amp fuse).

[grumpygy]

alternator going bad would not blow your fuses, as an example a dead battery and a high output alternator (>100Amp) would (assuming both  fuses were fine or in place when it happened and not just one 50Amp fuse).

I did have another High output Alt on it and the Battery was dead.  So that would have blown those fuses.  Now this alt was starting to go think the bearings were shot.  So it was good I changed it.


   I did notice yesterday that my Check Engine light is not working, so I was wrong before when I said it was.   Hopefully today I will change the Bulb.  Been hot here and working on it is more than I want to do.

[grumpygy]

Only got so far as to find the Check engine light needs a new bulb, So will pick up a bunch of those and dash light since I have that all out.

  Did get it running long enough to check voltage at the battery with it running 14.7.


I also have an old alarm system in it I no longer use, could that trip the auto shut down relay.  I seem to remember a while ago having problems with it.  I no longer even have a key fob to activate it.  The alarm would come on at odd time pissed me off so bad I ripped the siren out of it. I have not been able to trace all the wires to remove the rest of it but may go out right now and try.

[sharpxmen]

Only got so far as to find the Check engine light needs a new bulb, So will pick up a bunch of those and dash light since I have that all out.

  Did get it running long enough to check voltage at the battery with it running 14.7.


I also have an old alarm system in it I no longer use, could that trip the auto shut down relay.  I seem to remember a while ago having problems with it.  I no longer even have a key fob to activate it.  The alarm would come on at odd time pissed me off so bad I ripped the siren out of it. I have not been able to trace all the wires to remove the rest of it but may go out right now and try.

if it has the "immobilizer" feature hooked up then yes, but it doesn't explain why is starting first.

I wonder if it's either a crank or cam sensor (the latter would be more likely based on what you describe), the codes should tell you if that's the case.