I've had an 01 cobra for about 6 years and have enjoyed it. I'm about to sell it and get an 03 cobra with 30,000 miles on it. I did a compression test on the 03 cobra with these results: 1. 200 2. 195 3. 200 4. 175 5. 200 6. 200 7. 195 8. 195 All numbers in psi. The numbers look good, but number 4 is about 20 psi below the average. This is within 25% but not within 15 psi or even 10 psi as some suggest. I don't have the equipment right now to do a leakdown test. What do you guys think?
You really need to do a leakdown if at all possible. The numbers you reported from the compression test are all above normal. 175 is actually a good number for an '03 with 30K on it. Just out of curiosity on my part... #4 is the rear passenger cylinder when standing at the front of the motor, right? U.M.
those number are high for sure.... for reference I did a comp test on my '04 @ 8k for peace of mind before warranty ran out. Mine ranged highest of 178 to low of 171. I would think your test were somehow flawed. U.M. is correct on cylinder location.
