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Rough Starting - Glow Plugs?
My '82 244 has been having more difficulty starting than it used to, and with winter coming, I would like to see about diagnosing this soon.
The glow plug light stays on for about 45s (No matter the temperature) before it goes out. + The car is taking longer to start than it used to (Even in warm weather) It got worse recently when my injector line started leaking (currently looking to replace) Are there any other potential reasons for the longer starting time? |
#2
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It's pretty easy to check the first four glow plugs with a test light or multi meter, five and six little more more difficult, but doable. Check those first.
How is the fuel filter? Fuel supply lines in good shape And tight? How many miles are on it?
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12mm pump heads, ARP stud kits and GTD nozzles available! http://d24t.com/showthread.php?t=1646 NA intake manifolds and 240 turbo pans for sale. Need d24 or d24t parts? PM me! Shipments done on fridays! 1982 242 D24+T/M46- Super pumped! Build thread: http://www.d24t.com/showthread.php?t=1545 1984 764 D24T/ZF build thread: http://www.d24t.com/showthread.php?t=1734 Diesel parts cars: 82 244,83 244, 84 244, 84 245, 85 745 |
#3
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See the sticky on hard starting for more ideas.
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1985 744 gle d24t 1985 745 gle d24t |
#4
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Just tested the glow plugs with a test light; all 6 look good.
The fuel filter was replaced this Summer and the valves were adjusted. One fuel line is leaking. Car has 194k miles. Battery is at appx. 10v when glow plugs are on, is this OK? Could this have anything to do with the fuel pump or injectors? |
#5
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Unbolted the rear GP buss bar to check GPs #5 & 6 independently?
Battery strength? Starter? My starter had recently been going bad but gradually; it was hard to really notice the slower cranking speeds. Replaced the starter and Bang! Now it starts almost before I twist the key! What is the battery voltage before energizing the GPs? Injector line possibly a contributing factor-- how much is it leaking? From where? Injection pump could also be a factor, esp. if the mainshaft seal leaks air into the IP while parked. Have a helper try to start it while you watch the transparent fuel line into the IP, watching for air bubbles.
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1985 744 gle d24t 1985 745 gle d24t |
#6
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Yes... You MUST test each plug independently. You may need a new realy(s) and/or temperature sensor in the back of the head. Also, do not run 15w40 (or thicker) oil in these engines. I, as does VW, recommends a 5w40 synthetic. 0w40 synthetic also works well. Thicker dino oil in these engines is not ideal. You will also notice a starting improvement, less (if any) need to adjust the valves, etc.
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Mike Rausch Newark/Bear, DE Selling NEW and USED Volvo parts! www.swedishbrickyard.com Email: mike@swedishbrickyard.com |
#7
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I didn't check 5 & 6 independently; I'll also have to check out the IP.
The battery voltage before glow plugs are energized is 12.8v. It's leaking at the hard line just a few inches before the injector (3, I think?) I put some epoxy on it for now to slow the spray down to a leak. It still leaks enough that after driving, when I park the car and get out, I can smell the diesel from the engine. I run 10w-30 in the warmer weather and the 5w in the colder weather. (I think that's what the original Volvo manual recommended) Would a bad temperature sensor be the reason why the glow plugs are on for 45s no matter the temp outside? |
#8
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Proper glow
Quote:
Quote:
Also you could connect 1st cyl temp sensor to your glow plug just to see whether the other sensor is still functioning or not. Last edited by RedArrow; 11-12-2014 at 03:09 PM. |
#9
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Quote:
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#10
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Quote:
Very long glow time at all times will be hard on the plugs, alternator, etc... worth tracking that down.
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86 745 D24T/ZF 345k lifted 2.5" 83 764 D24T/M46 155k Last edited by v8volvo; 12-29-2014 at 05:04 PM. |
Tags |
d24, diesel, glow plugs, injector line, rough start |
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