My car engine sounds good and when is running it will not move fast

So changing the computer will not help here or in any case -- for anyone reading, I can't understand why the knee jerk reaction is to "replace a computer". It's a waste of money and a headache 99% of the time. What is a "compression repair"? An engine performance diagnosis (which is cheaper than anything else you've done yet) is required to find out if are experiencing a fuel supply, spark, air supply or exhaust restriction issue.I lean towards intake or exhaust issues. Restrictions in either case will cause an extreme lack of performance -- as the engine is not "breathing" as it should for proper power.