[olddog]

I have been chasing a problem for 3 years now. It started on hot 95 degree days, if you shut it off and restarted in about half hour it will miss and not rev up. Almost like it was against the rev limiter at say 2000 rpm. Problem is getting worse over time. Now it will do it on a 70 degree day and it gets so bad it will not even idle. It now blows black spoke running rich when it does it. It is definitely an under hood temp issue. It may take it 2 hours to start again if I keep the hood closed, but only a half hour if I open the hood.

I have good fuel pressure while it is doing it, and good spark. I have replaced everything from the coil, distributor, ignition module, wires, plugs, caps. In other words, I have replaced the entire ignition system. I have checked the injectors (ohms, and spray pattern) and they are good (OBTW 36 lb/hr). I have inspected grounds and all wires (new harness with the system but checked it anyway). I have swapped out the EEC4.

I'm down to the GM MAF meter or the signal converter. The signal converter is a circuit board with chips on it and it is sealed in gummy stuff like the inside of the TFI module. Other than MassFlow, there is no known source for a special board to convert a GM MAF meter pulse train into a 0-5 volt signal for the Ford EEC.

So I would like to just eliminate both the GM MAF and the signal converter and just try a Ford MAF. I do like the look of the air cleaner that is on it, so if it turns out to be something else, I may want to go back to it. It kind of depends on how good I can make this look, as well.

My first priority is to prove that the MAF system is the problem.