Timing Light Do I Need One

[luvpsi]

hey guys im going to change my timing belt on my rb25det. i have been told to get a timing light however if i line all the marks up correctly i shouldnt need to use a timing light. a few people have told me to use one and a few of the mechanics at my work have told me not to worry. just wondering what everyone elses opinion is.

[blind_elk]

The timing light is necessary to check that the CAS is re-positioned correctly - it is adjustable, after all.

[luvpsi]

ok even if i mark it and line it back up?

[BOOZTJUNKEY]

Yeah mate Put a light on it my cas just died I replaced it and I put the new one in the same place and my timing is all screwed I have flat spots all thru the revs till after 5g and then my car violently jerks back and forth backfires and is a right pig to drive

[ClutchBurndout-:(]

how exactly do you get a timing light to work?

i heard its a right pain in the ass because of the coilpacks

[BOOZTJUNKEY]

There is a solid white wire just befor the igniter you use that as your number 1 trigger wire for your timing light

[ClutchBurndout-:(]

There is a solid white wire just befor the igniter you use that as your number 1 trigger wire for your timing light

for series 1 or 2? i have S1

edit: just remembered S2 dont have an igniter

Edited February 4, 2011 by Clutch

[boiracer]

same thing. same spot. no ignitor.

replacing the CAS with another one you Definitely have to check the timing. if your doing the 100 tho service, and using the old one again, then mark it beforehand and put it back as you found it is an OK way of doing it...but I'd still suggest checking it with a timing light again at the end anyways.

if you need to buy one (i did, my old one was too old school) then make sure you get one that clips over wires......not under a spark plug lead.

simple, clip the clip over the white wire. positive and a negative on the alligator clips and your away!!

Edited February 4, 2011 by boiracer

[ClutchBurndout-:(]

same thing. same spot. no ignitor.

replacing the CAS with another one you Definitely have to check the timing. if your doing the 100 tho service, and using the old one again, then mark it beforehand and put it back as you found it is an OK way of doing it...but I'd still suggest checking it with a timing light again at the end anyways.

if you need to buy one (i did, my old one was too old school) then make sure you get one that clips over wires......not under a spark plug lead.

simple, clip the clip over the white wire. positive and a negative on the alligator clips and your away!!

that sounds easy as

so once i have the (good) timing gun, attach to white leads, and read the timing degree on the gun? that how it goes?

[BOOZTJUNKEY]

It's been a while but off the top of my head you need to mark the TDC point on the harmonic ballancer should be a little mark on the pulley then behind the pulley should be the timing marks you need to point the gun at the marks and as the car idles you should see your TDC point line up with a certain degree of timing it should be around 15 degree before TDC if that makes sense tho it has been a while I could be off a lil

[Moodles2]

Car needs to be put into base idle mode when checking the timing, either doing it through CONSULT software (ecutalk etc).. I'm not sure if unplugging the TPS or unplugging some other related thing will put it into base idle mode as well.

[89CAL]

Getting the timing light to work with the loop wire is not always easy.

For a surefire way of doing it. Get a spark plug lead (old or new) remove number one coilpack and put the lead over the spark plug. Slip a bolt into the end of the coilpack and put the other end of the spark plug lead over the bolt. Now your skyline is oldschool with leads and sh!t

Clip your timing light over that and you'll be sweet. I say this cause we could not get the loop wire to work on my car and had to do this

[BOOZTJUNKEY]

I'm pretty sure base idle mode for 25s can be done by disconnecting the tps and 20s can be done by disconnecting the aac valve not 100% tho

[89CAL]

Yep

[Duncan]

Getting the timing light to work with the loop wire is not always easy.

For a surefire way of doing it. Get a spark plug lead (old or new) remove number one coilpack and put the lead over the spark plug. Slip a bolt into the end of the coilpack and put the other end of the spark plug lead over the bolt. Now your skyline is oldschool with leads and sh!t

Clip your timing light over that and you'll be sweet. I say this cause we could not get the loop wire to work on my car and had to do this

spot on.

also, some cheap timing lights read double when using the loop at the rear of the motor. nfi why but they do....i had a supercheap one that was sending me crazy reading 40o when it was really at 20o

[89CAL]

yeah mine was only a cheapy as well, and was giving me weird readings, spark plug lead worked a treat