If the timer you have looks like a starter relay it is located at the back of the engine close to the fire wall. There is a little plastic cover over it that you can pry off with a screw driver. It has 2 large and 2 small wire posts on it. I had to replace the one on my brothers truck the other week. Hope this helps.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Many things to check. Wonder if this work was done to alleviate problem or problem was from doing the work.
Putting gas fumes in a 21:1 compression cylinder is sure way to ruin engine.
2 possible problems are losing your diesel fuel draw from an air leak in the fuel lines and an inoperative glow plug timer.
When you change a fuel filter you lose the vacuum lock that is in the fuel lines. Some mechanics add fuel to the new filter to remove some of the air and promote fuel draw. The O rings on the injector lines are a special type which resists petroleum products. Using cheap O rings will cause problems.
Glow plug timer-there is a power Relay to the timer and the timer itself is a type of Relay. You should hear clicking noise and lights should dim as timer provides power to the glow plugs.
Other things to check would be the Vacuum pump as Diesels work differently than gas engines and require a pump to supply Vacuum. Covering the intake suggests engine needs a Vacuum draw.
Weak fuel pump. Too weak to pressurize or draw fuel. Can be measured with pressure gauges.
Really bad rings could also cause symptoms.
Would be interested knowing what proved to be wrong.
Check for fuses first. The Glowplug timer is the proper name for the part that responds to Temperature when starting your engine. When the engine is cold, of course it is on longer and can cycle making a click and intermittently dimming the lights on your truck. When the engine is warm, your gowplugs may not even fire as the engine is using compression alone to fire up.
Also, Ford did make a Severe Weather model that kept the glowplugs on longer. If you stay in Alaska or a climate with consistent subzero temperatures you may need it.
The relay should cost about $35-45. A common Ford Starter relay can be used in place of the official glow plug relay. All that is required is a relay with terminals that have 5/16 or 3/8 terminals and can carry about 150-200 amps. When all 8 glow plugs turn on, it draws about 150 amps is all. There are two relays for the 7.3 diesel. One energizes the glow plugs and the other energizes a heating element in the air intake. That one is used to help eliminate white smoke while warming up and is turned on and off by the engine computer. It is usually only called for when the temperature is 20 degrees F or lower. Otherwise only the glow plug relay works.