Question about 2006 Toyota Land Cruiser

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Glowplug light glow plug light comes on with full acceleration and power decreases slightly?

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  • Toyota Master
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Heavy foot??why full acceleration? may be torquing engine to the point where the connectors are pulling apart..

Posted on Jan 01, 2014

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Posted on Jan 02, 2017

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Mr BrokRench
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SOURCE: Landcruiser 05 1HZ, Glow Plug

Hello kbmind, A number of different glow plug systems were used on the Landcruiser, depending where it was made and what country it was shipped to. However, they all serve the same purpose on a diesel injection. To preheat the combustion chambers. If your light is on when you deaccelerate the control module thinks the cylinder is cooling down & fires up the glow plug. This usually indicates the glow plug relay is weak and/or the glow plugs themself are worn.
Depending on your mileage, i would say it's the relay. The glow plugs can be tested with an ohm meter to determine if they need to be replaced. I hope this helps.

Posted on Sep 17, 2011

Testimonial: "Thank for the feedback, I will now look at the relay"

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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

Glow plug light comes on & gos off Location of Glow Plug Relay


Glowplug relay 180; located in Position 10 in the relay panel. If you unplug the coolant temp sensor, you can trick the computer into thinking it's really cold out, and it will run the glow plugs.

Mar 10, 2011 | 2003 Volkswagen Beetle TDI

1 Answer

Motor turns over but will not start it is getting fuel has new glow plugs but i don,t know if they are coming on


Its not too hard to check the glowplugs. You can do it several ways. Either take off a wire to each glowplug and connect a test light or meter to the wire and the other end to a ground.

If its a stick shift you need it in neutral, set the brakes or block a wheel. If yours is an Automatic, Park or neutral is fine. Turn on the key and listen for a "Clicking sound". The wire you pulled off should cause the test light to light up, or the gauge to move if the gauge is set to 12 volts.

Without a test light or gauge you would just pull out a glowplug and ground the case. Reconnect the power wire and repeat the earlier test. This time you need to look at the glowplug to see if it is getting redhot.

If the power wire is is not delivering spark, you need to check the timerbox for power going into it. If the timerbox is not getting power, contact Autozone or Oreillys and see if your model has any Relay for the glowplugs. If there is power going to the timerbox and none coming out, then the timerbox is bad.

The timerbox is only on for 2 minutes or less. It stays on longer in cold weather. But a diesel uses the hot glowplugs only to start, the Timerbox will be on less and less as the glowplugs heat up. This makes diagnosing the part tough. You may have to let things cool off several times to verify it is giving the glowplugs spark.

Jun 06, 2010 | 1988 Ford F 350

1 Answer

1996 fiesta ghia diesal no glow plug light


No power to the glow plugs means no power to the light also. You have a bad fuse or connection to the glow plug relay. Fix that and your good to go. Has nothing to do with your indicator lights on either side of dash. Glow Plug power indicator is labeled THAT and only that.

Jun 25, 2017 | 2000 Ford Focus

1 Answer

No power to glow plugs...relay replaced...still no power...jumped 12 v to glow plug side of relay and glow plugs then energize. Can ignition be at fault?(1999 jetta alh)


There is a big fuse in the engine room for the glowplugs.
You'll find it just near the brake vacuum cilinder under a black cap...
Hear if the glow relay ticks when you'll put power on. Does the glow light lights on?

Oct 30, 2009 | 1999 Volkswagen Jetta

1 Answer

Flashing glow plug light


sounds like a glow pug fault.it will flash if one glow plug has a fault.

Jun 03, 2009 | 2003 Volkswagen Golf

1 Answer

Nissan vanette not starting from cold


it sounds like there is a short in the glow plug suply circut if they dont work when installed into the engine you might try wiggling the connectors

Dec 01, 2008 | 2002 Nissan Altima

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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