7.3IH_Eggrole
Corn Shucker
Currently my Dads (1992 F350 IDI) truck is having some WTS light irregularities lately. A couple weeks ago the WTS light was going off within 2 seconds of turning the ignition switch on. For his truck that is normally as sign that the No.7 glow plug is bad. We checked it and the rest with a 12V test light and No.7 was bad. So we replaced all with ZD9's.
The next morning (~20*F air temperature) the WTS light came on and then went off within a couple seconds and the system continued to cycle (click) and he began to crank on it but it was hard to start. After driving to the field he restarted the truck and the WTS light stayed on for ~10 seconds before cycling. It started easy then, but it always does after if first start in the morning.
This irregularity of a short light cycle in cold weather with a cold engine and a longer light cycle with a warm engine in cold air has happened every day since replacing the glow plugs.
I have rechecked the plugs with the test light and they all pass. I see no noticeable breaks or chafes in the the glow plug wires.
Questions: What should I check to remedy this problem and how?
This truck is glow plug dependent and as it gets colder it needs them more.
Thanks
The next morning (~20*F air temperature) the WTS light came on and then went off within a couple seconds and the system continued to cycle (click) and he began to crank on it but it was hard to start. After driving to the field he restarted the truck and the WTS light stayed on for ~10 seconds before cycling. It started easy then, but it always does after if first start in the morning.
This irregularity of a short light cycle in cold weather with a cold engine and a longer light cycle with a warm engine in cold air has happened every day since replacing the glow plugs.
I have rechecked the plugs with the test light and they all pass. I see no noticeable breaks or chafes in the the glow plug wires.
Questions: What should I check to remedy this problem and how?
This truck is glow plug dependent and as it gets colder it needs them more.
Thanks