My CPS wont adjust down or up to 10 degrees

[Rennat]

So i had some issues, there fixed now, buttt... my timing WAS off, and now since i redid the physical timing with the belt and cam gears, its 100% accurate. Both of the intake and exhaust cams line up perfectly with the marks on the cover, and the crank is at 0 degrees and i know my crank key is in good shape.

Why cant i get my cps to go down or up to 10 degrees though?
i was able to before with my 3mm headgasket... and now i cant on my 1.4... could that have made a big difference? i also changed my intake cam since something happened to it... but both of the cams are in the center dowel, so it makes no sense to me...

any ideas?

 

[Slow66]

So i had some issues, there fixed now, buttt... my timing WAS off, and now since i redid the physical timing with the belt and cam gears, its 100% accurate. Both of the intake and exhaust cams line up perfectly with the marks on the cover, and the crank is at 0 degrees and i know my crank key is in good shape.

Why cant i get my cps to go down or up to 10 degrees though?
i was able to before with my 3mm headgasket... and now i cant on my 1.4... could that have made a big difference? i also changed my intake cam since something happened to it... but both of the cams are in the center dowel, so it makes no sense to me...

any ideas?

Although you may have verified the key is in fine shape, that doesnt necessarily mean the balancer is correct. The rubber elastomer between the 2 portions of the balancer may be compromised and allowed them to rotate on each other a bit. Verify TDC with the IJ method of a chopstick thru the #1 plug hole and rotate the crank until its highest point and see if it corresponds to TDC on the balancer. If that checks out, and both cam gears are lined up properly, then the CPS position needs to be rechecked.

 

[IJ.]

And yes changing from a 3mm to a 1.4mm HG will affect the timing (1mm was around 1.8 degrees from memory)

 

[juhanis]

i have a problem similar to this... now i'm pretty sure of the fact that i'm running a 98 2jzge vvti bottom end, an older 2jzge non vvti head, 2jzgte headgasket, with full 7mgte electronics arent helping things very much. but yeah, i cant seem to get my timing down to something below 10degrees btdc. i've tried almost everything to no avail. i did manage to get it to 10* btdc, so, i'm thankful of at least that. all my marks are correct... i've verified many times. i'm just throwing this out there to see if anyone can tell me something useful. i didnt mean to treadjack :icon_bigg

 

[suprarx7nut]

It could be as simple as you not inserting the CPS into the correct gear teeth when putting it in.

One time, I couldn't get the damn thing in straight for the life of me on my turbo. It took about a dozen tries to get it right. I'd done it before with no problems and always gotten it right first try on my N/A, but for some reason I just kept ending up a tooth off...

To keep it simple I would try reinstalling it if your range of timing does not reach 10 DBTDC

 

[Sawbladz]

I would check the CPS is on the right tooth first. I have had that problem personally.

 

[bluemkiii]

My brother is having the same problem. He can't get his car to 10 degrees. Its a 5 right now and we've both tried fixing it by moving the teeth of the cps and nothing. It will either go to 15 degrees or 5 degrees. If we do move it to 10 the bolt for the cps wont bolt on the head.

Kinda off topic question but would a 7m start with the cams 180 degrees off?

 

[Rennat]

my brother redid the cps, and he got it... so who knows.

but i have some other issues... it idles at like 500ish rpms and i have no trouble codes, although i found a bad wire on the o2, but i fixed that and nothing else changed... and im pretty sure i have a "whistle" from somewhere in my intake manifold area... so im going to investigate that further.

 

[suprarx7nut]

My brother is having the same problem. He can't get his car to 10 degrees. Its a 5 right now and we've both tried fixing it by moving the teeth of the cps and nothing. It will either go to 15 degrees or 5 degrees. If we do move it to 10 the bolt for the cps wont bolt on the head.

Kinda off topic question but would a 7m start with the cams 180 degrees off?

You still have the cps off by a tooth. Guaranteed.

Pull it back out, line it all up and try again. You may have to try a dozen times to get it right. I got it wrong at least 8 times in a row last time. There's a very small margin for error.

 

[bluepearl]

Just for the hell of it, reinstall CPS 180 degrees off.

 

[rtrdpenguin]

+1 on the one tooth off. I just put mine in and 1 tooth off let me get up to around 5 deg but no further.

 

[grimreaper]

my brother redid the cps, and he got it... so who knows.

but i have some other issues... it idles at like 500ish rpms and i have no trouble codes, although i found a bad wire on the o2, but i fixed that and nothing else changed... and im pretty sure i have a "whistle" from somewhere in my intake manifold area... so im going to investigate that further.

vac reading?

 

[juhanis]

yeah, i'm probably a tooth off. i cant wait to get my megasquirt installed. the laptop will take care of that... hahaa. oh well, i guess i'll pull the damn thing out and stab it in again. even though i went like 15 times or so. oh well. stupid cps.