hi guys,
its been awhile, i been up to my eyeballs in optician school which is almost over.
swmbo's 95 m-ed is throwing a code and i forget how to get the lite to blink out the codes. i thought it was jump 10 & grd but alas it isnt, any hint?
tia, peter
Try Miata.net
What I found was that some Bosch alternate part#'s were better than others. However, that was with four wire sensors. If you get into using the aftermarket replacement sensors, it's a good idea when you still have problems to make sure that the old and new sensors have a reasonable match. On the 99 NB's, the sensor response times can cause problems in the test cycle. The 95 NA's should not be as picky.
I had a "slow" front sensor, and a "normal" rear sensor. There were intermittent codes set, claiming the Cat efficiency was bad. Replacing the front sensor seemed to make a big difference, but a Cat efficiency code would still set on a rare and intermittent basis. The output voltage on the bad front sensor was well within spec. The usual failure circumstances involved a fail during the morning run to work, or the next morning at low speed after a five hundred mile run on interstate 75. The whole problem turned out to be one of those combinations that are a pain to deal with. When all was said and done - - New coil packs finally eliminated the very occasional Cat efficiency codes. The only direct symptom of a possible bad coil pack was a slightly rough "feel" at an RPM/power/load setting that is transient as gears and throttle settings change. No coil related codes were set.
One of the issues was that a new Cat would make the Cat efficiency code go away until it was fully "broken in".
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