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idle too low when start up(with movie)
by
carrizog60
on 23 Mar, 2008 12:06
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hello
i have been messing with the cold start mechanism to try to low my idle in order to increase the fuel but after that when cold my idle stays to low...
750rpm and the engine shaking too much but after a while it rises to the normal 1000rpm...
what could this be?
also what is the proper way to adjust the cold start lever as i want to check my timing and dont know if that is properly adjsuted(i messed with the bolts on the side/top)
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#1
by
Ltsmash
on 23 Mar, 2008 19:36
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have you properly adjusted your residual fuel quantity screw? (the idle stop screw)...if that is incorrectly adjusted it could give a variance in idle.
To set it...screw it in until idle just barely increases and lock in place...as for the proper adjustment on the cold start lever adjustment i'm pretty sure there is no "standard" adjustment, all depends if your governor is set correctly (proper load on the idle spring/fuel screw)
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#2
by
jtanguay
on 23 Mar, 2008 23:22
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sounds like one cylinder might not be firing properly. that would cause a low idle and some shaking.
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#3
by
carrizog60
on 24 Mar, 2008 02:58
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what tests can be done?
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#4
by
jtanguay
on 24 Mar, 2008 11:58
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what tests can be done?
one way is to loosen the injector line nut going to the injectors one at a time. if the idle lowers, then that injector is fine. if nothing changes then that injector (or cylinder) isn't firing properly. if it goes away after a few minutes, it could be a bad glow plug.
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#5
by
carrizog60
on 24 Mar, 2008 15:14
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heres a video...
movie doesent show but car shakes way to much...
i also tryed to show my settings on the pump,dont know if helps...
timed to 1.05mm,155bar merc nozzles on 1.6 bodies.
http://www.youtube.com/watch?v=4YZiAkCzZmY
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#6
by
carrizog60
on 25 Mar, 2008 14:15
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:idea:
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#7
by
jtanguay
on 25 Mar, 2008 19:43
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that thing is clacking something fierce!
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#8
by
burn_your_money
on 25 Mar, 2008 19:49
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that thing is clacking something fierce!
I'd say. How old are your injectors?
Can you hear an increase in idle? The way the tach moved looked more like the belt was slipping and giving a false reading
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#9
by
carrizog60
on 26 Mar, 2008 01:00
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no,the idle just stays low.
it increases slowly but the tacho goes up at the same time.
the injectors are gtd bodies with merc 261 nozzles set to 155 bar,nozzles have less that 6 months and 2 month ago i checked the opening pressure and was ok...
the engine is a solid lifter n/a converted to turbo,i thouth that it would clatter more because of that...
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#10
by
jtanguay
on 26 Mar, 2008 20:48
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true... solid lifter will definitely clack more.
in my experience with both GTD's and regular TD nozzles, i would have to say that the GTD's felt good on the butt dyno... much better than the regular TD's. i couldn't accurately measure my mpg before because of some really bad tires, but now hopefully my mileage will increase some.
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#11
by
carrizog60
on 27 Mar, 2008 00:42
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i cant say if i have more power since the car when it came back had the pump 1 tooth off,diferent settings on smoke screw and now,even after i tryed to put everything the way it was before the boost wont go more than 1.6 bar...
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#12
by
jtanguay
on 27 Mar, 2008 03:00
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i cant say if i have more power since the car when it came back had the pump 1 tooth off,diferent settings on smoke screw and now,even after i tryed to put everything the way it was before the boost wont go more than 1.6 bar...
hmmm 1.6 bar is quite a bit.. how much were you running before?
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#13
by
carrizog60
on 27 Mar, 2008 13:46
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well, before i was running 2 bar at 4800rpm...
if i rev more it would go further on boost too :twisted:
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#14
by
Ltsmash
on 30 Mar, 2008 00:54
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sounds like your running with no wastegate :lol:
its quite the rush pulling 35psi of boost in these motors...:twisted:
too bad they are so gutless at higher rpm, well at least mine is haha :cry:
sounds like perhaps a fuel screw adjustment is needed...raise the idle and increase max boost