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Post by darrin on Dec 9, 2008 14:38:35 GMT 11
hi people was wanting to no if it was safe to leave the temp sensor unplugged ?the one that make the engine glow a bit longer
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Post by geeves on Dec 9, 2008 17:41:18 GMT 11
It controls more than just the glow plugs. It also advances the injector timing and enables the cold start switch on the dash.
With the sensor unplugged the advanced timing will cause diesel knock which isnt realy harmfull but can result in overheating. If the dash button is activated then the flap closes in the exhaust which will cause lack of power and overheating.
ie not a good idea
You could fit a momentary disconnect switch in the line to the sensor so you can push the button and hold while you start the car then release so all is back to normal. You also then can start the car warm without the long glow
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Post by darrin on Dec 9, 2008 18:56:19 GMT 11
i have all the cold start gear taken off my truck,just its seems to blow alot of black smoke when cold 9FIRST START IN THE MORNING),have had diesels before but my mu just seems to blow more than normal,thought disconnecting it might help with that first start when cold.would it help do you think?and is it still harmful with all the cold start gear removed.? Thanks
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Post by geeves on Dec 10, 2008 8:18:42 GMT 11
By cold start gear do you mean the exhaust flap only? The glow plugs are also for cold starts.
No harm will come from removeing the cold start stuff and unless you run in sub 0 temps a lot very little difference will happen.
If you have a 2.8 it will start without the glowplugs down to below 0 although it will run like a pig for a little while I rarely wait for the glow light to go out.
The isuzu engine does smoke more than some engines when cold This is just the nature or the beast. It only has 18/1 compression to allow more turbo boost but the trade off is a smokey start
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Post by darrin on Dec 10, 2008 10:17:21 GMT 11
i have all the egr off it and the exhaust flap gone and the one in the intake started great this morning wire sensor off,and not alot of smoke,is it ok to leave the sensor off.Thanks
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Post by geeves on Dec 10, 2008 10:45:21 GMT 11
It should knock like a debt collector and might overheat. Diesel knock is not a lot different to pinking in a petrol car and can cause the same problems
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Post by darrin on Dec 10, 2008 17:24:45 GMT 11
I dont notice any knocking at all but it does glow longer,But no knocking at all,could some thing else be up with it.??
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Post by geeves on Dec 10, 2008 21:01:38 GMT 11
It isnt a knock like a bad bearing. More like the pinking noise petrol cars make when you fill with the wrong gas but deeper at more solid sounding
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moo
Isuzu Baby
Posts: 31
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Post by moo on Dec 12, 2008 0:52:09 GMT 11
It isnt a knock like a bad bearing. More like the pinking noise petrol cars make when you fill with the wrong gas but deeper at more solid sounding i get this noise when i'm around 3200rpm.. any help as to where this sensor is? i haven't disabled it, but the previoius owner may have. Cheers - Michael |
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Post by geeves on Dec 12, 2008 7:55:05 GMT 11
If its at one narrow rev range its not this. I had a similar noise at 2200 which took over a year to track to a loose bolt on the cover on the intercooler
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moo
Isuzu Baby
Posts: 31
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Post by moo on Dec 12, 2008 22:38:23 GMT 11
bugger... it's so damn annoying though  |
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