Quote:
Originally Posted by BenFenner
Ignition timing on your car is done by moving the distributor, which in turn, moves the cam angle sensor. There is a large range of movement allowed in the mount of the distributor. You have mounted the distributor in an extremely advanced setting, advancing your base timing from 15 degrees before top dead center to something probably as high as 25 degrees BTDC. An advanced engine will idle very high.
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Thanks Ben for your input. My car is a 93 NX2000. It does have a camshaft position sensor built into the dizzy. I realized that it was mounted incorrectly when the idle went nuts!!
The rotor plate inside the dizzy has many degree marks: 180deg @ cyl num 1 slit, 1deg signal slit, and three other 180deg signal slits... My questions is how do I realign this rotor plate with cyl 1 TDC??
Quote:
Originally Posted by BenFenner
You need to retard your ignition timing by sliding the distributor until the idle calms down. Ideally, you should do this with a timing light. You've basically "untimed" your engine, and need to bring it back to factory specs using the standard timing method for our cars.
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I did this immediately after installing the dizzy. I have a timing light and a Consult cable. Put the car in timing mode and adjusted the timing to 15degs. The idle was at 2200rpm. While still in timing mode, I turned the idle screw to lower the idle. With the idle screw bottomed out (all the way in), the idle was still at 1000-1200. So then I did an old trick of adding lots of load (headlights, heater fans, defroster, fog lights). I then adjusted the idle to 850. But when I came out of timing mode, the idle was around 950 & AAC was at 45% open. And thats the way it is currently...
Quote:
Originally Posted by BenFenner
In a pinch, the engine can be timed by sound if you know what 15 degress BTDC sounds like (I do... Do you? =) ) but really you're going to need to get a timing light. At the very least, you can not drive the car anymore until you've retarded the timing some as it is not in a drivable state.
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Nope, I dont know what it sounds like. I have a friend that can recognize the 15 deg BTDC sound. I'll ask him to listen. The timing light shows 15deg and the car
is drivable. Just poor gas mileage (20 mpg) and the strange High Idle..
How do I realign the rotor plate with TDC?
