Wierd starting issue

[795.0pacecar]

I just converted my car to mass air using an 80mm Pro-m MAF, A9P, and the FMS conversion harness that comes with those expensive conversion kits. Well I checked the TPS voltage and I cant get it any higher than .85v at idle and when its that high it idles at 1500rpms, so I have it at .60v right now and it idles around 750rpms. When I start it the idle will jump to 2000rpms, then step down to 1500rpms then die. It wont die if I goose the throttle alittle, if I do that it will idle down to 750rpms and idle kind of rough. I pulled the codes and I got: 24, and 34. With the speed density computer I didn't get any codes.

Im alittle stumped so any suggestions are dreatly appriciated.

 

[795.0pacecar]

I drove around for a while. Sometimes it will idle at 750-800 rpms and sometimes the idle will hang around 1500rpms. I checked the codes about an hour later and the code 24 is gone, but now it throws up code 54 which according to fordfuelinjection.com means ACT sensor signal is greater than the Self-Test maximum of 4.6 volts. So I guess they are related since they are both out of range codes. The code 34 doesn't bother me, it used to show up here and there with the SD computer now that I think about it.

Its just wierd to me that the TPS voltage cant be adjusted within spec and that the ACT sensor is bad all of a sudden, when it worked fine with the SD computer.

On a side note based on my SOTP meter the car feels a bit quicker, I guess the greater accuracy of the mass air system over speed density goes a long way.

 

[TENGRAM]

I drove around for a while. Sometimes it will idle at 750-800 rpms and sometimes the idle will hang around 1500rpms. I checked the codes about an hour later and the code 24 is gone, but now it throws up code 54 which according to fordfuelinjection.com means ACT sensor signal is greater than the Self-Test maximum of 4.6 volts. So I guess they are related since they are both out of range codes. The code 34 doesn't bother me, it used to show up here and there with the SD computer now that I think about it.

Its just wierd to me that the TPS voltage cant be adjusted within spec and that the ACT sensor is bad all of a sudden, when it worked fine with the SD computer.

On a side note based on my SOTP meter the car feels a bit quicker, I guess the greater accuracy of the mass air system over speed density goes a long way.

"within spec" for the TPS is .49-1.2vdc, so yours is ok. you might want to replace that ACT though.

 

[795.0pacecar]

Wel I know that technically it was in spec but before I could get it to .99 no problem, but I guess perhaps there are variations like that between the comps. The ACT sensor is 9 months old, but I guess it could still be bad, sucks though because I have to remove the upper intake to change it. I guess I could just put one in the intake tube.