Question about Mitsubishi Colt

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Colt diesel takes a long time to start. glow plugs and battery are new. some one suggested glowplug relays or the black box. what can i do to check if its any of the two or what do you recommend i do

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If the ignition controls the amount of time glow plugs are on for flick the ignition off and on 3-5 times each time letting the glow plug symbol glow untill it turns off then try starting. if its still slow to fire your glow plugs are not working at all. start by backtracing the glow plugs from the adjoining bar back to wherever it comes from for breaks, then replace your glow plug relay in the fuse box usually.

if its manual glowing just glow it for 10-12 seconds and try.if its not firing then the glows arent getting the power they need

Posted on Feb 14, 2014

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Posted on Jan 02, 2017

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SOURCE: Nissan vanette not starting from cold

My vanette had exactly the same problem yesterday. The glow plugs have a timer and a relay. I think that if the light on the dash goes on and off as normal then its probably the relay not the timer. So I have replaced the relay (£50 nissan dealer only) which is located in the center console below the radio/heater controls. Until its really cold again tomorrow I wont know if its really cured it but I'm fairly certain that will be it.

Posted on Nov 01, 2008

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SOURCE: ford f350 7.3l diesel carnks but won't start

Check your battery voltage while cranking. If it's too low, the electronics won't work and the injectors won't fire. If the batteries are down a bit, there won't be enough power to turn the engine over fast enough to start. It needs a minimum of 100 rpm and 8 volts while cranking. You also might try waiting till you're sure the GPR has dropped out. That takes the GP load off the batteries and may get the voltage up enough to get it to start, oh and also does the tach move when you're cranking? If not, then chances are the CPS is the culprit.

Posted on Feb 16, 2009

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SOURCE: Problem with cold starting Ford 7.3L Diesel at > freezing temps

most likely the relay. its located to the left of the fuel filter( looking at the motor from the front). my experience is that they only last about 50,000 miles. the part costs about $20 at an navistar dealer. remove the cowl over the filter, disconnect the batteries(so you don't short the new relay out if you cross the polarity with a wrench) ,remove the four wires from the ceramic relay, un-fasten the relay from the base. reverse the process with the new relay. CAUTION; do not over-tighten the nuts on the wire studs, you could crack the ceramic relay.(iv'e done it) . hope this helps

Posted on Mar 18, 2009

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SOURCE: jeep cherokee 2.5 diesel. wont start

sound like starter or starter solenoid bad.

Posted on Dec 16, 2009

rony_masc
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SOURCE: I have a 1983 Toyota pick up w/ a 2.2 diesel that

first of check the glow plug or heater plug! be careful while removing heater plug from engine. due to aged vehicle, heater plug may crack and will remain there, and if that happen head of engine must be opened. check the heater plug by giving 12v dc current. give positive at top portion and negative at middle, and take alook whether heater plug is heating or not?

Posted on Jan 14, 2011

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Transit tipper 05 won't start first time when cold I have just had a Diesel pump fitted for 600 pound as this fault was coming up but it still does exactly the same it will start if it is warm but after...


With a Diesel there are additional parts that you have which affect the Cold start. There is a timer between the glowplugs and the Power relay on the start circuit. The timer cycles the glowplugs off/on for a variable time period. The more cold, the longer the cycle period.
Glowplugs go bad. You remove them like sparkplugs. Testing them is a matter of comparison. When power is applied they can melt, so test with care. Hook battery jump cables to each glowplug taking care to attach one lead to the base (avoiding the threads) and then briefly touch the top of the glowplug.
The quicker the plug glows, the better it is. The darker, the worse it is.
But the timer must provide the juice to the glowplug for it to work. A bad timer will not properly heat the glowplugs. The timer must get its' power from the Power relay. So you can have acceptable glowplugs, and a bad timer.
Ultimately once the engine cylinders have run hot enough, a Diesel fires by compression and not by spark as a gas motor does. That is why once you have a hot diesel, it will start freely.
It is why I explained the needs of a Cold Diesel engine and I hope this helps you.

Jul 30, 2013 | Ford Cars & Trucks

1 Answer

2007 ford courier 2500 L have to turn over for a long time would it be glow plugs if so where do i find them


If this is a diesel, the glowplugs are in the heads similar to how sparkplugs are installed.

You should first check several other parts. The glowplugs get their power from a Timer. The Timer sometimes is combined with a power relay or the power relay is separate. The power relay is turned on by a signal from the Ignition switch.

So if the Timer, Power Relay, or power feed off the Ignition switch, is defective, the glowplugs will not work.

Check one of the wires to the glowplugs with a Voltmeter. The Timer will send several pulses to the glowplugs and then need to cool off.

The glowplugs only work for a few minutes for the initial start.

If the above parts are good, then check the glowplugs by removing and using battery jumper cables.

Clamp one to the base of the glowplug avoiding the threads, then briefly touch the top of the glowplug with the other polarity jumper.

Caution--you can melt them. Just observe if one stays dark longer than another. A dark glowplug is bad, a bright glowplug is good. Its all relative.

Please comment on my info.

Mar 31, 2013 | 2007 Ford Ranger 2.5

1 Answer

MY 93 FORD 350 7.3 I PUT SWITCH ON AND START CLICKING RIGHT AWAY BEFORE WILL TAKE FEW MINUTES SEEMS LIKE T GLOW PLUG IS NOT WORKING RIGHT IF I PLUG THE ENGINE WILL START WITH NO PROBLEM ,SOME PEOPLE


This is not to hard to solve. The outside airtemp determines how long the Glowplug timer works for absolute cold starts. Starting a warm engine is affected by underhood temps.

The Timer Relay will pulse power to the glowplugs. If the glowplugs are good, it is enough to preheat the cylinder for firing.

To tell if a glowplug is good is a matter of comparision between a new glowplug and a worn glowplug. YOU CAN MELT A GLOWPLUG WITH THIS TEST, but you remove the glowplugs, get a set of battery jumper cables and place one jumper to the base of the glowplug USING CARE not to ruin the threads on the glowplug.

You do not want to arc the spark on the glowplug threads. You want your fixed jumper connector locked on the base of the glowplug. The other battery cable jumper is touched to the top of the glowplug where the arcing occurs. This will not hurt the contact point if done properly.

You compare the "glow" of the old glowplug to the "glow" of the new glowplug. Bad glowplugs stay dark or operate at a darker color.

The Timer Relay gives you pulses and that is all the glowplugs get to heat up. This is what you simulate in your test. If a glowplug operates in a dull or dark condition, it is bad and throw it away. You want all glowplugs to readily light up when power is applied.

The other 2 parts to the system are the Timer Relay and the Power Relay. The timer gets its power from the Power Relay and the Power Relay is like a starter solenoid. The Power relay gets a tickler charge when the keyswitch is held to Start.

There are sometimes extreme cold Timers that hold the power longer tothe glowplugs. I do not have the Specs to tell you if your Timer is kicking out to soon.

I hope my solution helps. I have told you how to test your glowplugs. The timers are affected by air temperature and that makes it difficult to say if it is working long enough. If you know the glowplugs are good, and the timer shuts off before the glowplugs heat up, then you need a new or different type of timer.

Sep 26, 2012 | Cars & Trucks

1 Answer

How to change glow plugs


Quick lesson Diesel 101, repair only what is broken. There is no reason to replace glowplugs if they work. There are other things that make the glowplugs work or fail to work.

You should be able to follow the wires from the glowplugs up to a box or module. This module is a timer. Its job is to vary the length of time the glowplugs work depending on atmospheric temperature and engine temperature. Then follow the wires from the timer module to a power relay. This part receives the signal from the ignition switch and transfers high power to the timer module.

Only when these are checked, should you blame the glowplugs. For glowplug testing you take them out and use battery jumper cables. You hook one terminal to the base and avoid crushing the threads. You then touch the other battery cable to the top of the glowplug. You can melt them, so do not overdo it.

When you find the brightest, that is your benchmark. Bad glow plugs only have as long as the timer allows for them to glow. Replace the darker ones, use the brighter ones.

Other than that point, glowplugs have no adjustment and come out like regular sparkplugs.

I hope this was helpful.

Jan 25, 2012 | Mitsubishi Galant Cars & Trucks

1 Answer

Replace glow plug on audi a3 2005


If this is a Diesel engine, the glowplugs would be in a position like a sparkplug. You can replace them as you wish, or replace only the bad one. To determine if a glowplug is bad, you would remove it as you do a sparkplug on a gas engine.

With several of the glowplugs removed, you would place a battery jumper cable on one end of the glowplug, while being careful not to damage its threads. That cable would be connected to the NEG battery cable. The remaining cable would be placed on the Positive(+) terminal of the battery and then you would briefly tough the POS cable to the top of the glowplug.

Do this briefly. You can melt the part. But you need to see if the glowplug will glow. Often the problem with glowplugs is the Timer box. This is the box from where the wires come from to go to the glowplugs.

If you have a glowplug staying dark, or failing to glow well, then it is a bad glowplug. Each should glow the same. That is why you check several at a time to tell what is normal.

I work on Ford diesels and do not know what plastic covers you may have. So just follow the wires that are not on the fuel injectors and that is all you can possibly do.

Dec 08, 2011 | 2005 Audi A3

1 Answer

2002 Ford F450 7.3 Diesel. Will not start. I use to have to keep truck pluged in all the time for it to start. Now it will not start at all. Turns over fine. Fuel is fine just will not start?? Please...


Hello, Most likely your Glowplug Relay is bad, and it supplies power to the Glowplug Timer which also may be bad.

Just follow the wires that are on the Glowplugs up to the Glowplug timer. Use a Voltmeter and check if the power wire that goes into this Timer has fire when the Ignition is turned to the RUN position. If there is fire going into the Timer from the power Relay, pull off one of the Glowplug wires and ground 1 end of a testlight and put the other end on the Glowplug wire.

The Timer itself will kill the power after a predetermined time based on Temperature. The colder the engine, the longer the Glowplugs stay lit. If you have power reaching the Glowplug, your power Relay is fine. You just have to observe how quick the Timer stays on.

The Glowplugs only have 1 or 2 chances to do their job at the Start-up. They are needed to make a Diesel start cold. Cold meaning at outside AIR temperature, and engine block temperature. There should be clicks under the hood and the lights should flicker in rhythm to the clicks if the Timer is working.

If you find that both the Timer and Power Relay are working, the Glowplugs need to be tested. They come out like sparkplugs. But you test them either on a special machine or use battery jumper cables. To test, hook one battery cable to the Glowplug base, avoiding the thread. Then take the other cable and arc it on the top of the Glowplug.

Caution, you can melt the Glowplug. If you get a bright glow, the Glowplug is good. If the Glowplug is dark or very slow to glow, it is bad. This should be all you need. Would appreciate a note after you fix it.

Jul 06, 2011 | Ford F-450 Cars & Trucks

1 Answer

I have a 1999 Ford F450 super duty diesel. It


Replace the glowplug relay.Its faulty.The glow plugs stay on until engine warms up.The engine temp switch then activates the relay to switch off.So it could be the temp switch also faulty.

Jul 17, 2009 | 1999 Ford Super Duty F 450

1 Answer

Glow plug problem


This may not person to your question. A friend familiar with diesels takes out the automatic electric timed feed to the glowplugs, installs a manual momentary switch to energize the glow plug warm up power. His theory is timer problems, to eliminate the timer and use the glow plug manually.

Oct 01, 2017 | Ford E-350 Cars & Trucks

1 Answer

Ford f250 superduty turbo diesel 7.3L Will not crank


Charge the batteries. take a Reading to make sure that you are getting almost 14v to both batteries. If it is not charging then take the alternator back off and have them check it. you might have bought a bad one. There is a way to test the glow plus with out taking them out. ( Take a piece of wire long enough to reach all the glow plugs from the battery. unplug the glow plug wire.If you touch the end of the glow plug with the hot wire it should make a little spark. if no spark then the glow plug is bad. do this to each one, but one at a time)

Feb 25, 2009 | 2003 Ford F250 Super Duty Crew Cab

3 Answers

Nissan vanette not starting from cold


My vanette had exactly the same problem yesterday. The glow plugs have a timer and a relay. I think that if the light on the dash goes on and off as normal then its probably the relay not the timer. So I have replaced the relay (£50 nissan dealer only) which is located in the center console below the radio/heater controls. Until its really cold again tomorrow I wont know if its really cured it but I'm fairly certain that will be it.

Oct 21, 2008 | 1990 Nissan Minivan

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