Setting the timing. NEED HELP ASAP!!!!
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gehzumteufel
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Setting the timing. NEED HELP ASAP!!!!
So i tried to get my car smogged and the timing was 9* btdc. so i attempted to fix the timing. unplugged tps, rotated distributor, tightned it down, plugged tps back in. drove to togos to allow ecu to adjust. rechecked it again and its back to same place. what do i do? i am now frustrated. this is the 2nd car i have tried timing and i can never seem to get it right. please help!!! thanks in advance.
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gehzumteufel
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dkdeleon68
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Re: (gehzumteufel)
are u sure it was the TPS u unpluged? the TPS connector is the connector coming off of the side of the trottle. (just asking)
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gehzumteufel
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s13sr20chris
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Re: (gehzumteufel)
sounds like you are doing it right. also note that the car must be warmed up completely. btw, retarded timing will not fail your smog. advanced timing can though.
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gehzumteufel
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gehzumteufel
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s13sr20chris
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Re: (gehzumteufel)
idling is fine as long as the rad fans come on twice.
my bad. i had a nissan instructor tell me that im240 standards allowed all the retard in the world.
my bad. i had a nissan instructor tell me that im240 standards allowed all the retard in the world.
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gehzumteufel
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gehzumteufel
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you need to adjust idle, to affect the timing. You do not turn the distributor. The distributor isn't really a distributor on the 240, Nissan describes it as a Crank Angle Sensor, because all it does in respect to timing is send signals to the ECU saying when the distributor is at 0' or 180', and turn a rotor to transfer the spark in the cap. The cap and rotor would not need to be there if coils were installed on the cylinder, but there would still be the CAS. Long story short, you were not changing the timing when you moved the distributor, you were just changing when the computer found that the rotor was in a certain position. Then among other things, it found the position of each of the cylinders, and continued sparking where it was at. This is a blessing and a curse, because when installing a distributor you just need to be in the ball park, not perfect. But setting timing becomes more difficult. You have to find an adjusting screw on the side of the IAC motor, turn this screw to affect idle while the TPS is disconnected. Raising idle will advance timing. Be careful it is easy to make the motor ping this way, so listen for it. Continue adjusting (lowering idle) until you get to 16' BTDC, unless you want to retard it less for performance reasons. Once you are showing the right time w/ your light, shut the car off, plug the TPS back up. The idle will return to normal, because now the computer will be adjusting it. Double check your timing now, it should still be good, but you will want to know before you get sniffed again. Oh, and 9' BTDC is 7' advanced, I would say that is enough to cause some emissions problems. I would imagine particularly high NOx levels, but also some hydrocarbon. If anyone else would like to elaborate further, be my guest.
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gehzumteufel
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Sorry, I do not have a digital camera. It is on the back of the intake manifold, on the bottom. The motor has a gold part on the round part of the body, and one of the air hoses on the intake goes all the way back to it. On it there will be an adjuster screw, it will be the one that will not remove the unit.