Well, low compression on that cylinder would explain the misfire. The head has to come off to see what’s going on. Hopefully it’s in the head - damaged valve, etc. and not in the block - like a damaged piston.
Do you have a bore scope? Would love to know what a camera sees in that bore.
Not sure what units you’re reading on the compression gauge, but the LPT engine is about 9.0:1 compression, so you should see at least 160 or so PSI. I know that more than 9x14.7 but it’s about how much you see on a healthy 9:1 engine.
Consistency across readings is the real test and a low cylinder is a cause for concern.
Last edited by Astro14; 12-13-2021 at 07:41 PM.
Current Fleet:
2016 Tundra Crewmax 4WD 1794
2005 MB S600 (126K, Michelin AS4, HPL 0W40)
2005 MB SL600 (55K Michelin AS4, Mobil 1 0W40)
2004 V70R (143K, six speed M66, HPL 5W40)
2004 XC90 (235K, HPL 0W30 Euro)
2002 V70-XC (295K, HPL 0W30 Euro)
2002 V70-T5 (225K, IPD bars, Bilsteins)
2001 V70-T5 (125K, IPD downpipe, cat back and other mods)
1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)
Bookmarks