Hello all.
Did a compression test on my corolla today, older brother performed it for me with his new compression gauge, we removed all the plug wires and plugs, and stuck the gauge in one cylinder at a time, and heres what it read
Un-lubed, by the way:
Cylinder #1 : 113 psi
Cylinder #2 : 108 psi
Cylinder #3 : 113 psi
Cylinder #4 : 111 psi
Is this low? As I understand it, the compression for this engine is fairly high, being 10:0:1 or something like that, but I don't think that's correct, I only read that at one source.
For clarification, this is a 1995 1.8 liter 4cyl, 16v dohc, 7A-FE, with 129665 miles on the supposed clock.
I've been running non-ethanol gas in it, since it's better for your car - I would only assume that this would leave me with improved results on this test, versus nasty ethanol gas.
My last vehicle was an 87 ford ranger, with about 134K miles on the clock it tested out at 160-155-160-165, from 1 to 4, respectively. However the test was done a little differently - Only one plug and its wire was removed, the other 3 were left alone, and the gauge stuck in one at a time, cranking it twice per test (it fired up every single time on the second crank, on 3 cyls!)
So it was done by just removing a single plug at a time, not by removing all four at once - as I understand it, the supposed proper method is to remove them all at once and test each cylinder individually, not just remove one plug at a time and test.
Suggestions? Is this proper compression? If not, what psi is considered healthy? Again, 1995 7A-FE 1.8l engine.
It seems to run quite well really, it never misses or hesitates or stalls or stutters or anything, its just a straight up sewin machine. Has good acceleration and excellent uphill pull, even with a removed cat replaced with straight pipe, and a flowmaster exhaust.
Did a compression test on my corolla today, older brother performed it for me with his new compression gauge, we removed all the plug wires and plugs, and stuck the gauge in one cylinder at a time, and heres what it read
Un-lubed, by the way:
Cylinder #1 : 113 psi
Cylinder #2 : 108 psi
Cylinder #3 : 113 psi
Cylinder #4 : 111 psi
Is this low? As I understand it, the compression for this engine is fairly high, being 10:0:1 or something like that, but I don't think that's correct, I only read that at one source.
For clarification, this is a 1995 1.8 liter 4cyl, 16v dohc, 7A-FE, with 129665 miles on the supposed clock.
I've been running non-ethanol gas in it, since it's better for your car - I would only assume that this would leave me with improved results on this test, versus nasty ethanol gas.
My last vehicle was an 87 ford ranger, with about 134K miles on the clock it tested out at 160-155-160-165, from 1 to 4, respectively. However the test was done a little differently - Only one plug and its wire was removed, the other 3 were left alone, and the gauge stuck in one at a time, cranking it twice per test (it fired up every single time on the second crank, on 3 cyls!)
So it was done by just removing a single plug at a time, not by removing all four at once - as I understand it, the supposed proper method is to remove them all at once and test each cylinder individually, not just remove one plug at a time and test.
Suggestions? Is this proper compression? If not, what psi is considered healthy? Again, 1995 7A-FE 1.8l engine.
It seems to run quite well really, it never misses or hesitates or stalls or stutters or anything, its just a straight up sewin machine. Has good acceleration and excellent uphill pull, even with a removed cat replaced with straight pipe, and a flowmaster exhaust.