Sorry for the delay in replying. My fellow technician is on long leave and I just happen to stumble on this question so I will continue assisting you from here.
Just to confirm the data available before we continue.
1. Vehicle does not start intermittently?
2. When not able to start, you do have ignition sparks?
3. Was the fuel pressure checked when it could not start?
4. When D4 light stays on or blinks, engine could not be started? Thuis is an indication of a faulty PGM-FI main relay. Known to intermittently fail caussing non starting. Alternatively this can also indicate a faulty PCM f the Check engine Light stays on as well and does not go off after 2 seconds.
I would suggest checking the PGM-FI main relay first. Remove it to check the printed circuit board of the relay. If any solders are found to be cracked, resolder them and retest.
Monday, November 9th, 2009 AT 12:44 PM