Saw this question asked a couple of weeks back, but couldn't locate the responses. I now have everything working on the 1.8L L-jet, Idles perfect; except, when the headlights are turned on the idle drops from 900 to 200 ? Is this indicate the battery, coil, or ?? is weak.
And, what can I do to diagnose the problem ? I have a simple radio shack VM
Thanks Jim
I haven't had that happen to me yet.
Sounds like it's time to cleanup under the dash a bit.
Good luck
It does take a modicum of engine HP to generate the amperage required to keep the lights bright (and whatever other electrical devices you have). Even though, that seems like a drastic drop...I could see a 100 rpm drop at idle, but not 700 rpm.
You would need an AMP guage to see what's happening.
add in wipers, the radio, and fogs. it seems like a huge draw to me. my carbed car does the same thing and other members i've spoken with tell me theirs cars do as well. i wonder how accurate the tack is below 400rpm, which is about what my falls to (from a 950 idle).
k
How/where do you test the amperage ?
pull it from the battery. get a 60-0-60 amp guage, connect the HUGE everyredwire bundle into one end of the guage, and on the other side, come out with a 8ga wire to the battery.
the needle should go over to the + side indicating your alternator is WORKING.
you know what I would do?
I would unplug the voltage regulator. Alternator doesn't "boot", doesnt draw any big current (field current) and wont drop your RPMs. Then use the amp meter to see what is going on.
Its quite possible you have just a lotta stuff you need to power, and your engine isn't your friend when you turn all of it on.
what "I" would do is to turn everything on and set the idle at THAT point, like it says in ever manual I have read dealing with the L-jet and D-jet.
The FI system is irrevelant in this case.
b
Damn Brandon.....gettin' a little hostile these days.....Aaron ain't puttin' out anymore?
Thanks Brando,
I'm ok for now : the headlights are 100W; what kind of amperage do comparable cars have today ?
I've been considering going 75amp
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