Memory Loss Oxygen
My 1990 Plymouth Voyager (4 cylinder 2.5 liter non turbo) keeps stalling!!?
It dies smoothly and for the most part only when you’re driving, It’s not at specific distances or terrain. It will start right back up if you turn the key to the off position before cranking it but it won’t start if you don’t do that.
I’ve replaced the spark plug wires and the fuel filter and put some fuel system cleaner in the tank, but that hasn’t helped.
I’ve gotten the computer diagnostic codes(if you turn the key on, off, on, off, on within 5 seconds the check engine light will flash the codes)
There was(in the order it gave):
12: Memory standby power loss
34: Speed control solenoid driver circuit
51: Oxygen feedback sensor stuck at lean position
21: Oxygen sensor circuit
15: Vehicle speed/distance sensor
41: Charging system excess or no field circuit
55: End of message
for reference I got this information from http://autorepair.about.com/library/ts/obd-i/bl-dtcs-80.htm?once=true&
Any ideas?
What I’d do first off if find out where is the voltage regulator on that vehicle and if it’s inside the main comp my gut seems to tell me that it could the main comp acting up or ground wires or the wiring has problems but I’d try another main comp= PCM-ECM first off.
You can different shops etc and see if any in your area offer a free full diagnose scan and see what their equipment pin points are the problem or problems.I’d be curious to see what happens after disconnecting and reconnecting the battery for awhile but get it scanned before trying to reset the comp system.
Hope that helps and best of luck.By the way any parts store or alternator shop etc should be able to tell you where the regulator is on that vehicle , and if it’s outside the main comp or inside the alternator etc change it asap.Also some parts stores print out free diagrams of the PCM circuits and with a 12 volt positive and negative automotive led test probe you could check the ground pins , and the main power feeds from the ignition etc going to that comp.
Some of the u pick auto wreckers sell those comps from 30 to 100 bucks or so but be sure that you know that the comp is coming from a vehicle with the same engine, transmission and features such as cruise control etc and I’d also try to get all the comps that are in that vehicle bec again it sounds like a comp issue to me.
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