I have a 87 lx 5.0 5 speed with gt40p heads and tfs stage 1 cam maf conversion. Got the thing together and ran great. I was letting sit there and idle for a while and noticed that the idle dropped down and started loading up and wanting to die. Gave it some gas and went and ripped it a little and it was cutting out. Shut it off and let it cool down all the way runs fine no miss but as soon as it starts warming up to operating tempature it starts missing again. It is kind of a random miss not a even one like plug wire on a header or anything like that. If you hold it at steady speed driving you can't even notice it but when you get back on the gas it is definitely there bad. Did a koer test and it gave me a 91 left side 02 sensor changed it and clened the plug to it and it is gone but still have the problem. The car had ran fine for about a month and then I sit there and let it idle there for a while and now I have this problem. Puzzles me to death the idle doesn't realy surge or anything spout connecter is in and checked the timing with my light got it set at 12 with spout out put it in back in to make sure the puter was changing it and it was up to about 17 at a idle. I do have slight vaccum leak that i think is coming from the plenum gasket or in that vacinity ordered a new 1 today. Any ideas guys Im kind of lost if the vacum leak doesn't fix it. Thanks