Magnifies

Had a CEL light yesterday for cylinder 2 misfire and replaced the coil, drove it for a bit and the CEL light is finally gone and the car ran great, no loss of power or anything weird. Realized today when I start up the car on a cold start there is a slight misfire sound coming from the exhaust, the car only has a VERY VERY TINY misfire that has little to no effect on the driving. This slight misfire only happens in low rpm but after the car is warm the misfire is gone. As I said before I had a very bad misfire and the CEL was on but replacing the coil helped a lot but the sound of it being inconsistent coming from my exhaust worries me.

Gives me like a “phub phub phub………. phub…….. phub…….” sound

Did my very first compression test myself where I rented the tool from my local o’reilly (LOL SORRY) and came with the numbers of Compression TEST

C1: 180

C2: 170

C3: 180

C4: 180

Compression TEST 2:

C1: 190

C2: 170

C3: 180

C4: 170

I cranked it like 8 times so after the second test my battery began to give me bad readings. Any recommendations, very stressed!

Chuck S

Compression:
Nominal: 228psi
Minimum: 135psi
Max variation: 28psi

What engine and how many miles on it? Fuel? "Mods?"

-- Chuck

Magnifies

2001 AP1 @114k miles, fuel is premium, bone stock except for NVDIA exhaust

Chuck S

Your compression is right at the average of Nominal and Minimum (well above minimum) and the differences are in tolerance. What makes you suspect compression?

(Your auto-correct changed your Invidia exhaust to a NVIDIA PC video card? Mine tried it too just now.

-- Chuck

Magnifies

Just worries be about the minimal misfire that disappears when the car is warm. The inconsistent sound pattern of my exhaust just raises my attention. Small burping when low rpm but they disappear when I’m like 3000 rpm.