10-08-2013, 02:25 AM
Contratulations! I hope.
The ecu will report a bad CKP, crank sensor, if it is hard failed or 1 misfire in 8 signal.
P0335
this new sensor added in 1996, is what allows the ECU to see misfiring and report it, P030x (0 = random, 1,2,3,4, cylinder specific)
this failure will not correct bad communication to your scan tool , (clean 12v does that)
unplugging CKP, that may cause limphome, and in limp home, the ecu will use all new tables, and such. hiding other serous errors.
CAS crank angle sensor, or CAS cam angle sensor is CMP. a dead CMP kills all spark, a bad CKP, can be only limphome or cause misfire. a dead CKP will not kill starts.
case in point:
motor is way lean , and misfiring.
force limphome, and motor goes rich hiding the TRUE failure.
may folks fail to realize what limphome is, or how it works.
take the case of a good maf, and a huge air leak,
motor is lean, (big leaks here; do that)
so owners unplug the maf, this in fact does 2 things. it causes limphome, and MAF mimic that is a virtual MAF simulation ! and goes way rich, (BY design)
the reason limphome goes rich, is because it cant go perfect with no maf, so goes rich to avoid engine KILLER LEAN.
by design. they have no other choices.
but pulling the CKP is a great test , too is the ECU many not show a fault for all types of CKP failure, what if it sent too many pulses?
I think too many pulses, cause, P300s. (keep in mind the CKP is what measures crank velocity , the key player)
What if the timing belt was never changed at the 60k limit. and is now slipped. and compression is low. (ever do compression?)) not at 170clog or 185psi warm to hot>
and then the CKP is not firing totally wrong. due to cam timed wrong. The ECU can not figure that out, not now , not ever.
the compression is the first test.
so is checking spark timing, and unmolested engine, will in fact show huge spark time errors when the belt slips.
in cases where the PO found that error in dist. timing and corrected, that, he just hid the cam error and 2 wrongs dont make a right here,
that folly, is way my helper made the sneak-a-peak page, to check cam timing, while ignoring the dizzy.
limphome does go rich
limphome does mimic bad sensor
limphome just to do 1 thing , limphome .
without limphome, many or most EFI failures would result in engine stall. (or worse) (like racing ECU's , they only work when all is perfect)
since comms are/wer lost, i bet you missed most of the errors the ECU was sending you... I tend to fix that first, so Im not working blind.
ive only seen one comm loss ever, and only a few from friends (1996 ecu and newer) bad DC power. in all cases . (or crap scanner (china no name , missing the term resistor R36? )
did you know there are vast ELM327 China illegal clone scanners missing R36, (buy a real scanner) its the term resistor for comms.
i run scantool.net (have all 3{wired/blutooth-wifi) scan tools. and they never ever fail. (zero cloned parts, inside!)
i do hope the CKP fixes this , i do
I
The ecu will report a bad CKP, crank sensor, if it is hard failed or 1 misfire in 8 signal.
P0335
this new sensor added in 1996, is what allows the ECU to see misfiring and report it, P030x (0 = random, 1,2,3,4, cylinder specific)
this failure will not correct bad communication to your scan tool , (clean 12v does that)
unplugging CKP, that may cause limphome, and in limp home, the ecu will use all new tables, and such. hiding other serous errors.
CAS crank angle sensor, or CAS cam angle sensor is CMP. a dead CMP kills all spark, a bad CKP, can be only limphome or cause misfire. a dead CKP will not kill starts.
case in point:
motor is way lean , and misfiring.
force limphome, and motor goes rich hiding the TRUE failure.
may folks fail to realize what limphome is, or how it works.
take the case of a good maf, and a huge air leak,
motor is lean, (big leaks here; do that)
so owners unplug the maf, this in fact does 2 things. it causes limphome, and MAF mimic that is a virtual MAF simulation ! and goes way rich, (BY design)
the reason limphome goes rich, is because it cant go perfect with no maf, so goes rich to avoid engine KILLER LEAN.
by design. they have no other choices.
but pulling the CKP is a great test , too is the ECU many not show a fault for all types of CKP failure, what if it sent too many pulses?
I think too many pulses, cause, P300s. (keep in mind the CKP is what measures crank velocity , the key player)
What if the timing belt was never changed at the 60k limit. and is now slipped. and compression is low. (ever do compression?)) not at 170clog or 185psi warm to hot>
and then the CKP is not firing totally wrong. due to cam timed wrong. The ECU can not figure that out, not now , not ever.
the compression is the first test.
so is checking spark timing, and unmolested engine, will in fact show huge spark time errors when the belt slips.
in cases where the PO found that error in dist. timing and corrected, that, he just hid the cam error and 2 wrongs dont make a right here,
that folly, is way my helper made the sneak-a-peak page, to check cam timing, while ignoring the dizzy.
limphome does go rich
limphome does mimic bad sensor
limphome just to do 1 thing , limphome .
without limphome, many or most EFI failures would result in engine stall. (or worse) (like racing ECU's , they only work when all is perfect)
since comms are/wer lost, i bet you missed most of the errors the ECU was sending you... I tend to fix that first, so Im not working blind.
ive only seen one comm loss ever, and only a few from friends (1996 ecu and newer) bad DC power. in all cases . (or crap scanner (china no name , missing the term resistor R36? )
did you know there are vast ELM327 China illegal clone scanners missing R36, (buy a real scanner) its the term resistor for comms.
i run scantool.net (have all 3{wired/blutooth-wifi) scan tools. and they never ever fail. (zero cloned parts, inside!)
i do hope the CKP fixes this , i do
I
http://www.fixkick.com