Just had a mate over and to achieve 15 degrees on his car the CAS had to be at the end of it's adjustment!

 

Rattling my brain, I can only think of these reasons:

 

Cambelt out a notch.

 

Temp Sender Faulty (didn't come up as a fault on the conzult)

 

CAS faulty

 

Any other takers?

Timing light problem ?

Early cars had a problem with the cas drive peg, didn't they? Or would that fall under 'CAS faulty'..

Timing light problem ?

 

Timing light is ok, did mine a little while ago and it is spot on :)

I have heard of the cas drive peg wearing on S13's but not 300s?

I have heard of the cas drive peg wearing on S13's but not 300s?

 

Hmm.. maybe I've gone crazy with my old age - that's always a chance.. but I thought it affected early ('89) heads on our cars too.

i'd say worn cas , or faulty plug or earthing out somewhere like mine was

ide go for a tooth out on the cam pullys

Timing light problem ?

 

I was going to say that. Had just the same thing after Phil a C & S Wood had sorted my car. He had done a few that week no problem, but J D check it with his timing light and bingo.

 

Phil took his light to be tested and cam back with a new one.

I'm no techy so this is just a thought.If the heads had been skimmed and therefore sitting lower could this affect the position of the cam sprokets and belt.therefore affecting the position of the cas to give the 15 degrees needed.like i said it's only i thought so i'm sure a good techy can put us rite with this idea.

I'm no techy so this is just a thought.If the heads had been skimmed and therefore sitting lower could this affect the position of the cam sprokets and belt.therefore affecting the position of the cas to give the 15 degrees needed.like i said it's only i thought so i'm sure a good techy can put us rite with this idea.

the belt is fixed between the heads via the teeth and any stretch or deviation is the tensioners job

Good that explains it.

the belt is fixed between the heads via the teeth and any stretch or deviation is the tensioners job

 

Not on the untensioned side it aint - thats why adjustable cam pulleys are available, to overcome exactly that, the head skimming and variation between engines. However in this case no skimming would produce that much deviation! Either the belt is out, the CAS is faulty or the locating peg on the camshaft has snapped off and the adjustment is a notch out (the cam and CAS also locate using splines but use a very weak peg to ensure correct alignment)....

>> but I thought it affected early ('89) heads on our cars too.

 

correct...not a very common problem though

 

if the timingbelt has slipped one or more tooth it can be noticed in lack of performance and detonation/pinging for no reason

 

if the car drives fine and the engine runs very nice, it is a faulty cas in most cases

ok read the thread to find out but, Whats a CAS please? Sorry

CAS = Crank Angle Sensor. It tells the ECU the position of the passenger side exhaust cam so that it can calculate things like when to fire the injectors and spark..

Thanks for all your help again Topless i really appriciate it, so it looks like i might have a faulty CAS ?

I have a spare one if you want another visit?

Ok mate sounds good how much do you want for it ??

 

Thanks

Ok mate sounds good how much do you want for it ??

 

Thanks

 

Give us a ring bud?

Ok mate sounds good how much do you want for it ??

 

Make him fit it and make sure it fixes it first....

 

:rofl: *ducks*

 

Only joking around btw, not implying anything about Mark - he's a good bloke :)

Make him fit it and make sure it fixes it first....

 

:rofl: *ducks*

 

Only joking around btw, not implying anything about Mark - he's a good bloke :)

 

 

You owe me beer for that aaron ;), on that subject when you gonna get yourself to a meet again?

You owe me beer for that aaron ;), on that subject when you gonna get yourself to a meet again?

 

Well I was saving that till I had a Z running again, but.. :wack: I was thinking of the one in Windsor next month - I'd be in the MR2, mind, but I'll park it at the back.. :rofl: