Acura CL 3.0 Misfire

[austin]

I have a 1999 Acura CL 3.0 that has the J30A1 engine in it. The car has 149,00 miles on it and is misfiring. The codes I am getting indicate a random misfire on all 6 cylinders. Things I have tried: change plugs, wires, and ignition control module. Gaps are correct and the distributor has a tiny bit of oil leakage but nothing major. I have been to 3 different places to have the car looked at. The first place (a Honda dealer) told me my #4 injector was clogged and needed to be replaced after looking at the car for 5 minutes (didn’t believe that), the second place told me that the distributor leak had fouled the ignition control module (why i replaced it with a junk yard one which did no good, neither my original nor the new one had any oil on them and no signs of corrosion), and lastly at another Honda dealer I was told that the car needed to have the valves adjusted because there was too much air as indicated by my MAP sensor. My question is, can Valves out of adjustment cause a misfire or is it something else. Valves aren’t clicking but I do not believe they have ever been adjusted. Another thing is that this problem started about a month ago and then went away for about 3 weeks and started up again over the weekend. Also the car runs smooth sometimes when I first start it up in the morning but once it gets warm it starts misfiring again.
Thank you for any help!
-austin

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[austin]

I had the timing belt replaced at 110,000 miles and the car has 149,00 now. Is it possible it really already needs to be done and do you believe that that is what I was hearing? Seems like it would need to be really loose for that to be the case

[EricTheCarGuy]

It’s possible that the hydraulic tensioner is bad if they didn’t replace it, you won’t know till you get in there and check the tension. It should be tight with no slack.

[Author]

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