check engine - P0171, P0174 | Ford Explorer Forums

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check engine - P0171, P0174

rad-t

New Member
Joined
May 25, 2007
Messages
8
Reaction score
1
City, State
Warsaw
Year, Model & Trim Level
SOHC 4WD 1999 "X"
Hi,

My explo 99 still got check engine lightning. I use my OBDII interface (ELM327) and ScanMaster ELM software to see what is wrong.

All the time it is P0171 and P0174 errors - fuel system to lean.

I've checkd and cleaned MAS, EGR, and all parts for any vaccum leaks.

I've got new fuel injectors.

Have no idea what is wrong - of course errors are not the real problem - the real problem are RPMs - low on idle or low/high on idle sometimes near 400-500 rpms and sometimes engine cut off.

here are screens from scanmaster
obd_1.jpg


obd_2.jpg


obd_3.jpg


i hope you'll be able to understand my english :)

thx.
 






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