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Old 11-18-2021, 01:19 AM   #26
lanxer57
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lanxer57 will become famous soon enough
 
Join Date: Oct 2020
Location: aurora, colorado, u.s.a
Posts: 333

1999 SC1
2001 SC1
Default Re: specifics on compression testing, P0301

The new spark plugs that I installed a few weeks ago are NGK, BKR4ESA-11 according to what is printed on the box.
The ones installed by a previous owner were autolite double platinum APP 3926, something I believe is specifically advised against for S series.
For my last test on reply #16, I removed all spark plugs, fully charged the battery, removed the PCM B fuse, and propped up the gauge on a large pair of channel locks in order to see the needle moving. The top row shows the results of that before adding oil, the bottom row shows results after squirting 1 TSP of oil in all of them with a syringe. For the tests with the oil added, the trickle charger stopped working (likely the faulty garage outlet), so I can not be sure if it was still fully charged.
I will need to conduct more tests on another day, I had other things today.
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1997 V6 Mustang coupe 2018-2019(wrecked, airbags went off)
2001 SC1 2020-2021(wrecked, frame was bent)
1999 SC1 2021-now(working progress)
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