The glow plug control module or relay is responsible for turning the glow plugs on and off so that you can start your diesel engine when it's cold. Glow plug timer-there is a power Relay to the timer and the timer itself is a type of Relay. The tach sensor should be on the injection pump timing cover. Putting gas fumes in a 21:1 compression cylinder is sure way to ruin engine. Too weak to pressurize or draw fuel. I've repaired many Fords where the problem was not the glow plugs but a fried glow plug relay. Both the relay and the control module are on the passenger side engine valve cover behind the fuel filter housing, with brown and yellow wires attached.
This heat warms the air inside the cylinder causing the diesel and air to combust. They are located under the valve covers, 1 per cylinder. Disconnect the Batteries, get a ladder and plan on getting comfortable i use a large foam pad between my chest and a … ll those sharp points in the engine compartment. In Ford diesels, the engine starts its combustion cycle by using glow plugs. The Glow plug relay will have a orange and black wire to it that goes to the starter relay. This means that if you twist something to the right it will get tighter and if you twist it to the left it will get looser. Covering the intake suggests engine needs a Vacuum draw.
Needs cleaned before yu put on new parts anyway and the glow plugs need to be taken out with the right tool or you may end up with a broken off glow plug in your cyclinder head. It has an extensive diagnostic and repair section for glow plugs in your truck, either 6. Do not replace the harness. You can carefully check the resistance cold of each plug and determine which one are defective. The glowplugs are mounted underneith the valve covers on the 1999 7. There is a large rectangular connector in the middle of each valve cover disconnect this connector. The change is easy and its one less item for future problesm regards, ggrimes2 yahoo.
Very common and a good start for a hard start when cold diagnosis. Posted on Oct 18, 2009 Many things to check. Its main purpose was to minimize white smoke on start up and chances are it doesn't even work anymore so ignore it. One of the two big terminals connects to the battery. If the batteries are down a bit, there won't be enough power to turn the engine over fast enough to start. I had one time and that's all it took. I had no idea what it was until someone asked me if I had jump started someone.
If any are open guess what you have lots of work ahead of you. If you have more than 50K on the motor I would replace them all as the amount of work to do all eight is not that much more once you have the valve covers off. Can be measured with pressure gauges. Unlike a gasoline engine, the diesel engine does not have spark plugs, so the fuel can't get hot enough to combust when the engine block is very cold. To replace the glow plug relay or control module, remove the wiring harness in the case of the glow plug control module. I now use the modification for all my customers with 7.
Or a quaart of gas? It comes from the starter relay that is mounted on the inside of the passenger side fender by the hood strut. It looks like a small metal box mounted on a bracket with an electrical harness … attached to it. Model year 1999 and newer 7. Mark the position of the four wires attaching to the two large and two small terminals and remove the wires. A severe electrical shock may be given. The first was Dodge with a rather doggish 2. Bolt the replacement unit into place, re-attach the wires to the terminals and plug in the wiring harness, if it is present.
If you have ever jump started … another vehicle with yours consider this. Yes it does look like a starter relay on the 2002 model years. You should be able to get it at the auto parts store. Do not pierce the wires. Sep 29, 2013 not always the golw plugs can be bad and the engine can be low on compression.
I'll never have to worry about that relay again! The glowplug relay is located on the top of the engine, to the left of the fuel filter housing. A glow plug control module is a requirement of California emissions regulations. You can test the basic function of a glow plug relay with a test light. The glow plug relay has a large black with orange trace wire on the large terminal. Wonder if this work was done to alleviate problem or problem was from doing the work. If not then you can suspect the relay for and open internally and replace and retest. It is located just to the passenger side of the fuel filter on my F250 2000 7.
Unbolt the relay or control module from the valve cover. Fortunately, the steps to removing and installing a set of glow plugs in your Ford are simple. The O rings on the injector lines are a special type which resists petroleum products. Does the wait to start light come on? Note: If you have a voltmeter you can search the Ford forum and learn which pins go to each of the Glow Plugs. It has diagrams and wiring especially pins on the plug-ins. The wiring harness will have one branch come from the rear of the engine and two that seem to enter the valve covers. It can be very irritating to drop a glow plug into the engine compartment.