Engine dies
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Amateur
Joined: Dec 2011
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From: San Diego
Engine dies--FIXED!!!!!!
Fixed!!!!!
1998 dodge grand caravan 170k miles.
Van will start and die within a few moments at times, or run and die while driving. No lamps. Oil light will light after engine dies. Is there a relay after the ign switch, that feeds the engine control system?
1998 dodge grand caravan 170k miles.
Van will start and die within a few moments at times, or run and die while driving. No lamps. Oil light will light after engine dies. Is there a relay after the ign switch, that feeds the engine control system?
Last edited by Nick 98; Jan 18, 2012 at 12:54 PM.
There is an ASD relay. We have had problem with ignition switches from the 1996 thru 2000 NS bodys, But I don't know if you replaced the switch if that will fix the problem.
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From: SoCal
ASD stands for Automatic Shutdown. When the Powertrain Control Module (PCM) sees a steady timing signal from the crankshaft and camshaft position sensors it applies a ground to the ASD relay coil. This ground closes the relays' output contacts sending power to the ignition coil, fuel pump, fuel injectors, and O2 sensors. Anytime the PCM losses the sensor signals, the PCM turns off the ground to the ASD relay. This cuts power to the mentioned systems and kills the engine. Doesn't matter if you're idling in your driveway or cruising in 80 mph traffic.
Why an ASD relay? Blame it on the EPA. Correct engine timing is essential to decreased emissions. If the timing is off, emissions increase. Emissions are paramount to the EPA. Safety is not their concern.
I've often wondered why car manufacturers haven't designed a system to include a default timing signal in the PCM that could be used long enough to get you safely off the road in the event of a timing malfunction. Just something to give you 30 seconds to get out of harms way. A simple, inexpensive design that would save many a near miss or worse.
Stalling right after the engine starts is a classic sign of a malfunctioning security system immobilizer. Since it's stalling at speed I would lean towards the ASD system as MT pointed out.
Why an ASD relay? Blame it on the EPA. Correct engine timing is essential to decreased emissions. If the timing is off, emissions increase. Emissions are paramount to the EPA. Safety is not their concern.
I've often wondered why car manufacturers haven't designed a system to include a default timing signal in the PCM that could be used long enough to get you safely off the road in the event of a timing malfunction. Just something to give you 30 seconds to get out of harms way. A simple, inexpensive design that would save many a near miss or worse.
Stalling right after the engine starts is a classic sign of a malfunctioning security system immobilizer. Since it's stalling at speed I would lean towards the ASD system as MT pointed out.
Last edited by Cougar41; Dec 6, 2011 at 01:29 PM.
Thread Starter
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Amateur
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From: San Diego