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post #1 of (permalink) Old 12-10-2003, 11:33 PM Thread Starter
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headlights on idle up?

Hey gang,

Here's an interesting one for ya. I was out blasting around in my reconstituted Trackick (89 kick 1.6 8V drivetrain, 95 Tracker body) just now, trying to run some clean gas and fuel injector cleaner through the motor to hopefully iron out some problems with a weird idle.

It runs fine, but after 30-40 minutes of driving I pulled into my driveway, turned off the lights and came to a stop. The idle went down to about 100-200 rpms and obviously was trying to stall. I turned on the parking lights to check the tach and the idle came up to almost normal. I repeated this several times and each time when I turned the lights off the idle dropped down to nothing and when I turned them back on it came up.

I know the lights cause a little drag on the alternator, but wouldn't that slow the motor down?!?!? WTF is going on here? Anyone have any ideas?

puzzled,

~daxe
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post #2 of (permalink) Old 12-11-2003, 12:18 AM
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Re: headlights on idle up?

My first thought would be to check the grounds.....
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post #3 of (permalink) Old 12-11-2003, 02:32 AM
 
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Re: headlights on idle up?

I don't know if this will be of any use, but I know carb'ed samis have an idle-up feature on the carb that increases the idle speed any time one of three accessories (lights, fan, rear defroster) are turned on, to counteract the alternator load and try to keep the charge rate net positive. My Honda Civic has the same and it's EFI. It sounds like your beast is doing the same.

Look in the wiring diagram for a point where all the major electrical loads meet at one point, after passing through diodes. This is the other big reason why you adjust idle speed with the loads off, I figure.

For what it's worth,

R
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post #4 of (permalink) Old 12-11-2003, 04:10 AM
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Re: headlights on idle up?

They do have an Idle up with a load on the electrical system.
It is possible that the base idle speed needs to be set.
(remember that you are using a 16V fuel pump and that may affect the idle. that and we readjusted the throttle cable from when it was in the other body.)
It could use the timing set too.

we'll see what Tom has to say..
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post #5 of (permalink) Old 12-11-2003, 07:03 AM
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Re: headlights on idle up?

Don't worry, Daxe, that is normal. There is a idle-up solenoid like previously stated to compensate for electrical loads. Same as the terminal on the power steering pump, just gives a little more rpm's. Once you have some good fuel cycled through, we will adjust everything to spec. I have a feeling it has been fiddled with.
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post #6 of (permalink) Old 12-11-2003, 07:04 AM Thread Starter
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Re: headlights on idle up?

I totally forgot about the 16V pump thing, though that would probably be a higher pressure, right? We figured it would just go back the return lines if it fed too much gas, I think.

I also forgot about that throttle cable being so loose. Though one would hope the idle speed isnt controlled by tension on the throttle cable. [img]images/graemlins/tongue.gif[/img]

After I started this thread last night I did abunch of searching and reading and came up with the idle up solenoid thing. it seems to be working since it idles up when the lights come on, but the overall speed would seem to be low, then. It only comes up to about 700-800 when that solenoid hits. From what Ive readd it sounds like the whole thing is about 300 rpms low.

On the bright side...that thing really honks! Plenty of zoot left in that old motor, even without setting the timing or anything. The brakes are kinda weak but just feel worn rather than messed up. They are good enough to drive on the street for the time being but could definitely use new pads and a good bleed. The clutch works OK but I can get it to slip a tiny bit if I really hammer it in 4th gear up a hill. Steering is excellent and the truck tracks straight. The auto hubs engage as they should and when backing up I only have to go about a foot to unlock them. I spent 30 minutes with a DVM trying to find the radio power wires in that leftover clump hanging out the radio opening but gave up cause it was dark. I also noticed there are large openings in the interior rear on the sides near the tailgate that maybe had speakers in them originally? I'd like to find those grilles or whatever went there.

Im rambling. Nevermind.

~daxe
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post #7 of (permalink) Old 12-11-2003, 07:44 AM
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Re: headlights on idle up?

throttle cable- I don't remember if the cable was adjusted right on the doner. What I am saying is maybe the idle was incorrectly adjusted with that from a previous owner.

clutch- we can loosen the cable and see if that helps.
I do have a used one out of my tracker around still I think.
(good for the flywheel anyway but if we swap clutches I would put a new one in..)

Brakes I should have a full good set. and we can bleed them sometime.

the Pump thing I just threw out there as a possible.

Make sure the radio fuse is good before you try to find the hot!
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post #8 of (permalink) Old 12-11-2003, 07:54 AM Thread Starter
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Re: headlights on idle up?

</font><blockquote><font class="small">In reply to:</font><hr />
What I am saying is maybe the idle was incorrectly adjusted with that from a previous owner.


[/ QUOTE ]

You mean we can't blame Randy?

</font><blockquote><font class="small">In reply to:</font><hr />
clutch- we can loosen the cable and see if that helps.

[/ QUOTE ]

One of these days you are going to have to clue me innto the deep dark mysteries of adjusting a clutch.

</font><blockquote><font class="small">In reply to:</font><hr />
Brakes I should have a full good set. and we can bleed them sometime

[/ QUOTE ]

Cool. I can get pads too if needed. Someday I wanna put one of my extra sets of sami front disks in the back. I like being able to stop.

</font><blockquote><font class="small">In reply to:</font><hr />
Make sure the radio fuse is good before you try to find the hot!

[/ QUOTE ]

This is what made me give up. After testing lots of wires and only finding one 12V that was always on, I figured i would check the fuse(s). Since it was dark and I didn't know where the fuse box was, I decided to wait until it was light to deal with the whole issue and went for a drive instead.

~daxe
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post #9 of (permalink) Old 12-11-2003, 08:07 AM
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Re: headlights on idle up?

</font><blockquote><font class="small">In reply to:</font><hr />
You mean we can't blame Randy?

[/ QUOTE ]

HAHAAAAA no I don't think you can... he didn't really hack it up too bad... the tracker I used for parts ended up fitting nicely in a 5x8 utility trailer and never had shot of becoming anything but recycled. [img]images/graemlins/grin.gif[/img]

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