Originally Posted by Big Evil
Rule of thumb, when doing a compression test all the cylinders should be within 20% of each other. When you do this test you are cranking each cylinder the same number of times and writing down exactly as possible what each one is? 155 and 175 no real problem 122 and 200, problems. Need to know all the numbers in sequence, then I can tell you whether or not to do a CLT test which will tell you where its leaking from. Then we can decide if its fatal.
This car sat idle for about one year. After charging the battery, the car started and ran smoothly with the exception of a slight miss somewhere. The gas was (is) old. All I've done is run the car for about 5min and as it began to overheat, I shut it down. All plugs have a nice light grey/brown color and are all in similar condition. My compression readings are from the pass front corner to the pass rear, then continuing to the driver's front corner then to the driver's rear. I attached my compression fitting and cranked the car for a bit, I'd guess at least 5-7sec, until I saw the gauge stop "pulsing". The readings in order from the first test are: 179, 135, 160, 215, 170, 125, 135, 200. The second test I did in exactly the same fashion, just 5min later. The results were: 179, 140, 155, 210, 170, 122, 135, 185. This is the 4.4 engine, 98k. Any other info I can provide?? THANKS!