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What you need to do is make sure the key is off, remove glow plugs, hook a set of jumper leads to your battry, put the negative lead around the threaded part of the plug, hold the + jumper lead to the top of the plug where the power rail bolts on. DO NOT TOUCH glow plugs as they will heat up hot & fast. If the light comes on 6 - 8 sec thats how long you need to hold the power on. The tip of the plug should be nice & red hot in this time. Repeat for all plugs & see the diffrence If more than 2 are dead (no red heat) or noticably slower than the others It will be very difficult to start & the plugs should be replaced. AGAIN carefull not to get burned.
i think glow plug replacement needed. ever used starting fluid in cold to start?try this, next time no start, cycle your key and let the light come on, wait till it goes off, turn key again until light goes off, if you have to do this more than 3 times, and it runs fine, replace the glow plugs only then. thank you for choosing fixya.com!
This could most likely be one of 2 things, 1. if it is your maintainance light, it is probably one of your sensors, possibly the mass air filter sensor, oil pressure sensor, and 2. If it is a diesel engine and its the glow plug light, you would need to replace your glow plug relay because it telling you that the glow plugs are still on when the engine is running, which you should take care of asap before you have to replace the glow plugs themselves.