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Jeep Wrangler YJ
YJ General Discussion
1995 YJ Stalling problem
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<blockquote data-quote="deadpool1" data-source="post: 439636" data-attributes="member: 21229"><p>I forgot test 1.</p><p>keyon CEL lamp glow and goes out driving, and stays out. driving. check engine lamp</p><p>at the stall did any other thing in the car go dead. headlamps, or goes dim. radio, dash heater blower, goes dead? (Got A/C? did it go dead?)</p><p></p><p>our jeeps have a RELAY , ASD, (automatic shut down relay, or my name" no crash and burn relay")</p><p>it drops out all spark and fuel ends is 1 sec. flat.</p><p>lots of jeeps , the is that nasty O2 sensor short or its 2 heater wire belt and land against exh pipe, and shorts.</p><p>and 11-15 more causes(ask how)</p><p></p><p>but most simple of all, the ASD output overloads it goes off line. fast.</p><p></p><p></p><p>my jeep I can move the horn relay to the ASD relay spot (1 more free test) and see if the ASD was bad. (one removed)</p><p>free test #3 is unplug the 02 sensor and tie it back safe, and drive, cured?</p><p></p><p>yes some parts can fail ,only intermittently this is common and hard to find.</p><p>best way is to make it fail parked engine running,</p><p>some folks wiggle harness wires in the engine bay to find bad wiring, but stay away fan and its belt. (huge danger there)</p><p></p><p>The PCM will never report a bad fuel pump</p><p>the FSM book even tells all things the PCM can not detect, as car fails. <<<<< <strong>no better book exists</strong>, IMO , newer cars books are lame now. </p><p>PCM can not report vast kinds of pure engine mechanical errors. </p><p></p><p>that is all the tool-less tests I can recall now.</p><p>my guess is bad wiring.</p><p>if I must, there you go.</p></blockquote><p></p>
[QUOTE="deadpool1, post: 439636, member: 21229"] I forgot test 1. keyon CEL lamp glow and goes out driving, and stays out. driving. check engine lamp at the stall did any other thing in the car go dead. headlamps, or goes dim. radio, dash heater blower, goes dead? (Got A/C? did it go dead?) our jeeps have a RELAY , ASD, (automatic shut down relay, or my name" no crash and burn relay") it drops out all spark and fuel ends is 1 sec. flat. lots of jeeps , the is that nasty O2 sensor short or its 2 heater wire belt and land against exh pipe, and shorts. and 11-15 more causes(ask how) but most simple of all, the ASD output overloads it goes off line. fast. my jeep I can move the horn relay to the ASD relay spot (1 more free test) and see if the ASD was bad. (one removed) free test #3 is unplug the 02 sensor and tie it back safe, and drive, cured? yes some parts can fail ,only intermittently this is common and hard to find. best way is to make it fail parked engine running, some folks wiggle harness wires in the engine bay to find bad wiring, but stay away fan and its belt. (huge danger there) The PCM will never report a bad fuel pump the FSM book even tells all things the PCM can not detect, as car fails. <<<<< [B]no better book exists[/B], IMO , newer cars books are lame now. PCM can not report vast kinds of pure engine mechanical errors. that is all the tool-less tests I can recall now. my guess is bad wiring. if I must, there you go. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
1995 YJ Stalling problem
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