jonenitro

I have searched this forum and others up and down. This is my problem it starts hard when cold and i get a po171 po174 code this is what i have done so far if someone can help it would be much appreciated.

1) changed air filter
2) changed fuel filter
3) checked fuel pressure its at 69 book says 65 +8,-8 it is in range
4) changed plugs and wires auto lite platnum with motorcraft wires
5) chnaged intake o-ring gaskets
6) changed pvc put a motorcraft in
7) checked elbow for pvc for cracks checked for vacuum leaks all around with wd-40 carb cleaner and lastly just to make sure eather no signs of leaks
8) cleaned mass air with crc mass air cleaner
9) cleaned throttle body and iac sensor
codes keep comming back within 10 miles
i have a autoxray 6000 which can capture data and get freeze frame data if it helps
my next choice is to change mass air any suggestions hate to spend $120 and not fix problem
thanks in advance
jonathan

jonenitro

well went ahead bought a mass air from advanced auto cleared code with in 15 miles light came back on luckly advanced auto let me return it as defective and gave me a refund. now what??????

jonenitro

Well i found a bad vacuum line the elbow next to the radiator hose had a big crack hope this fixes it will no soon