What should the compression be at on a 1997 geo prizm.
which engine. the 1.6 or 1.8 toyota engine (its a corolla in snake skins) 4afe or 7afe ,
cold or hot?
warm / hot , is specified in the Factory service manual.
most cars get at least 150PSI (wide open throttle) hot (warm) , sparks out.
the compression ratio is the key factor for compression.
The 7A has 9.5 CR, way more than the 4A.
if way low on all cylinders the cam belt slipped, ever do a belt job at 60k?
here is an actual test off a good, 7afe
Compression test dry: CYL 1=210/CYL 2=200 CYL 3=205 CYL 4=205
when the belt slips the PSI can drop to 90 easy
spark plugs removed
block open throttle (and if smart pull fuel pump fuse)
crank until the needle goes steady. using remote start cable at starter lug, works best (safety , 3 ways)
Nov 20, 2014 |
1997 Geo Prizm