1JZ CAS Question

[beatle]

hey, need some help re: the 1jz CAS

long story short, after changing the front main seal, engine light came on with code 13 which is distributer circuit or ECU and a short drive showed the turbo's spool up REALY quickly with no top end.

i assume i put the CAS back in wrong



this is what i'm assuming is the CAS it was hard up against the bottom (left) of the groove

how is it suppose to go in or am i chasing the wrong tail

thanks in advance for any help

[JP]

The CAS is on the left of your pic, the black plug with the wires coming out the back of it.

It creates a signal from the toothed trigger disc that is pressed onto the rear of the timing belt crank sprocket.

Are all the timing marks on the crank and cams still lined up after having the belt off?

The other sensors for the ignition are up on the intake side of the head near the injectors, two plugs for the cam sensors.

[The Real Roadrunner]

your a tooth out on the/a cam and it would be in the advaced direction but im unsure of which one.

id probly say the inlet as that would cause a code to come up due to incorrect sync values in the ECU.

too tired to explain proply atm but remove all the covers and take a pic with the crank at tdc then i can tell you which one isn't lined up.

cheers
linden

edit, should have said retarded a tooth.

[beatle]

the cam timing is fine, but their is something wrong with the CAS. i had the round perforated disc on backwards, could this cause i fuzzed single?

you get a hotter exhaust flow from reducing timing than you do from leaning it out. ive tried this first hand. i deleted all timing from my map, (0) and went for a drive, the turbos were spooling from any point of accell in any gear and were making full boost below 2100 rpm. after the short drive my manifolds and turbos were glowing red hot and the engine bay was cooking!

[The Real Roadrunner]

shouldn't, but it can eat the belt.

the cas is just a mag type pickup so the only way youll get a shit signal is A shitty conection between it and the ecu or B filings/metal stuck to the pickup.


if it spools earlier it is normally due to retarded ign timing but it cant be adjusted as they are in a fixed location, thats why i think it has something to do with incorrect cam timing.


cheers
linden

[beatle]

would degreaser in a plug cause a bad connection?
also the toothed wheel is kind of deformed


1 tooth was bent a fair bit, but i tapped it down, idealy speaking should it be dead flat or dished?

[The Real Roadrunner]

hmmm not sure on that. id just make sure they all run true and it should be fine. as i said its a mag pickup so as long as all prifiles are the same and it runs thru the centre of the pickup there should be no issues.

cheers
linden

[beatle]

bahhhhhh, now its not starting at all, cranking but no start

its getting plenty of fuel and no ignition fuses are blown

if the CAS is now dead, would this cause the no start?

[byteme]

you fuxored it

[beatle]

your a tooth out on the/a cam and it would be in the advaced direction but im unsure of which one.

id probly say the inlet as that would cause a code to come up due to incorrect sync values in the ECU.

too tired to explain proply atm but remove all the covers and take a pic with the crank at tdc then i can tell you which one isn't lined up.

cheers
linden

edit, should have said retarded a tooth.

i should have listened to you in the 1st place, i think your probably right
i was just adament that i couldnt have moved the cam gears, but now i think about it, the belt could slightly adjust it when re-tightening

[The Real Roadrunner]

can you put a pic of the whole assy?

get it to TDC no1 which should have those marks at the top and make sure you double check that the crank is still at 0deg. the easiest way to do it is with the timing cover placed back on and then just slide the harmo back over the crank.

cheers
linden

[beatle]

thats with the crank at 0deg :S

[JP]

turn it another revolution.

[LeeRoy]

Rofl.

2 crank revolutions = 1 cam revolution
Therefore 1 crank revolution = 1/2 cam revolution

Thats generally what happens with 4 stroke engines anyways

[The Real Roadrunner]

the cam timing is fine

Told you so.

Ok so now turn the crank another 360deg which will have it at TDC on #1 and the marks on the cam pulleys should then be lined up with the marks on the backing plate behind them. In your case though i think theyll be out by a fair whack hence your incorrect ignition timing and fault codes.

cheers
linden