RB 25 timing

[BRAD@ZSOLUTIONS]

When using timing light on engine isnt timing supposed to be 20deg.? I was checking the timing saturday and found that it was sitting at 0. I put a waterpump on a few months ago and thought hey! maybe i put it back out of time.NOT! so i moved the cas to foward the timing and i had to turn it almost all the way advanced. Is it possible the sensor is bad? I know with the z32s that that sensor is common to go bad. Replaced mine twice. I know its not a mechanical issue, so is this all thats left HELP..bY THE WAY THIS IS A 2ND GENERATION RB25 if it matters. This may be the issue the whole time with my car.

[Darius]

This issue seems to be cropping up a lot lately. Mine is personally almost all the way advanced. I have heard of a guy having a poor ground on the body of his ignitor. So he grounded it directly to the chassis and the timing was set back to normal (center of CAS).

[Carl H]

could also be a dirty pickup...might need to bust out an external lead from the coil to the plug to get accurate timing.best is to use consult tho for EXACT timing.

[eh?]

RB25 base timing is 15deg btdc. Set the cas back to the middle and play with the lead, put it in different positions. Also make sure your idle rpm is correct too.

[BRAD@ZSOLUTIONS]

could also be a dirty pickup...might need to bust out an external lead from the coil to the plug to get accurate timing.best is to use consult tho for EXACT timing.

I am using external wire off of coil, also with consult no matter where you put cas ecm will componsate and set base to 15 deg. When you say put back to center and wiggle wire which wire do you mean. And also yes mine is almost advanced all the way.

[BRAD@ZSOLUTIONS]

RB25 base timing is 15deg btdc. Set the cas back to the middle and play with the lead, put it in different positions. Also make sure your idle rpm is correct too.

When you say play with lead, which lead?? from cas?? Thanks

[eh?]

No the timing light pick up lead. Set it in different positions, see what happends.

[eh?]

Also are you getting any ecu fault codes?

[Carl H]

the ecu will not set base timing to 15 degrees no matter where the cas is...the cas sets the base timing which the ecu assumes to be 15* then adds or subtracts timing from there.

[Darius]

So is it best to just set the CAS in the middle and go from there and just screw what the timing light says??

[BRAD@ZSOLUTIONS]

Also are you getting any ecu fault codes?

No fault codes. This also is a series 2 so no external ignighter.. Also moved the pickup around no change.. Is there anyother cas that will fit this series 2 motor? thanks

[Carl H]

in my experience thus far if you center the cas in the bolt holes it sets timing to approx 15* almost every time.

[Darius]

I'm going to try that because I think there are too many variables in my setup that throw the base timing off.

[BRAD@ZSOLUTIONS]

Well i played with it to no go. Placed the cas to the advanced position which showed 15 16 deg, and went and drove it. Drove completley diffnrent. Didnt feel dead and pulled like a mother till 7k. I really dont know what the deal is but i am about to run out of options. I guess i might leave it like this and go to dyno and see what the afratio looks like. If you guys come up with anything please let me know.. THANKS

[eh?]

I would back it off to the center for now. Also an EGT gauge can help here. Not enough timing will cause high egt's (as will too much timing). So if the CAS is in the middle and you are not getting high egt's then the light is reading wrong.I suggest borrowing another cas and see what happens.

[Darius]

Not to beat a dead horse or anything, but the FSM says to remove the "throttle sensor connector" before checking the timing with an inductive light. When I do that, the idle bounces all over the place and the engine almost dies. Can anyone explain this and do I really need to remove it to get a solid base timing setting?

BTW, I am reading 12 degrees BTDC for my base timing after moving my CAS to the middle position. I am thinking the timing light that I was using was off for some weird reason. ???? I also put the clip on the wire loop both ways and it didn't make a bit of difference.

[eh?]

It been a while since I've ran a stock ecu but I do remember removing the aac connector too. But per the fsm it says by removing the tps connector the aac with move to a fixed position.

What is your idle rpm?