1998 S-10 Engine Codes

[1935ford]

I read the codes on my pickup they are PO102,PO339,PO341. I have checked the voltage at the MAF and it is only half of the battery voltage. It is suppose to be at battery voltage my manual leads me back to the VCM and said it may be in default code, does this sound right to anybody?Im not that up on this electronic stuff so any help is very much appreciated. PO102=Mass or Volume Circuit Low Input/PO339=Crankshaft Position Sensor A Circuit Intermittent/PO341=Camshaft Position Sensor Circuit Range Performance.

[snsengineering]

what exactally is this truck doing when u drive it?

[1935ford]

When started first thing in the morning when its cold outside it runs rough and misses until fully warmed up then it runs fine other than setting the codes. It takes about 15 minutes to reach that point. In the summer it will start fine and you can drive it rightaway. Thank you very much for the reply. I have checked all the vacuum hoses and for vacuum leaks all seem to be fine. It has me stumped.

[bradrhale]

the MAF is not supposed to read 12 volts. it only reads as much voltage is as air the enters the breather. the more air that flows through the MAF, the higher the voltage. low input means that it is not sending enough voltage pulse back to the computer. it may be bad. i have heard of some people cleaning these with brake parts cleaner or a MAF cleaner. do NOT use carb cleaner. it leaves an oily residue that will cause dirt to buildup on it and cause malfunction. all of these codes coming up at once is wierd. makes me wonder if you have a loose or halfway broken connection somewhere.

[snsengineering]

change the fuel pressure regulator
thats all have to say
ASE MASTER AUTOMOTIVE TECHNITION