just got recovered home. slowing from speed and engine died.no bang or smoke or anything else just died.when you try to start it, it sounds like there is no compression.cambelt is fine, didn't overheat, was running fine!!think the only possibility is the belt has jumped a few teeth. fingers crossed its not gonna be super expensive!any other ideas what it could be? sympathy please!!

 

TDC Sensor I think, does it turn over really fast? see if the fuel pump primes when you turn the key? My old 3 door did exactly the same on the first day I got it, not happy, but easy to fix.
Good luck.

 

the fuel pump does prime yeah.and it does turn over quite fast aswell.hope it is this!!

 

Sounds like a cheap fix....

My cosworth went boom at 150mph a month ago and its still off the road, its not a nice feeling so i have some sympathy for you... Altho mine at the minute has stung me around £1500 and its still not back together

 

fingers crossed for a cheap fix.its a run of bad luck for me and a couple mates - one has torn a hole in the floorpan of his bmw and another has blown the gearbox on his focus!gutted for you though ryan.

 

My front prop came off at 150, smashed off the ground, blew the gearbox and the front diff also went under the stress of it all, clutch also jammed in. So count yourself lucky boyo!!!

Its all the fun of owning an RS though, going on a long trip and not knowing if your gonna come home driving or on the back of a trailer

 

ouch!i felt that one in my wallet aswell - let alone my own problems!

 

when this happened on mine it was the bottom pulley,it stripped the teeth off the cambelt causing the top end to stop while the bottom end carried on at 70mph!!!!! that was the last time i EVER drove A2 WWE

 

this is the first time iv had to be recovered home been driving almost 3 years and this is my 5th ford!trust the most expensive to be the one that breaks!

 

How much did yours cost? for me to get trailered 30 miles it cost me £140! robbing bastards.

 

blimey!! was prob only about 6 miles but cost me 40 quid.so not horrific

 

I know you have probably checked this but fuel cut off switch or cable leading to it my spare wheel somehow pulled my wire out on cornering resulting on it dying and not firing up just a thought mate

 

these cosworth mobiles sound very reliable

 

fuel pump runs fine.i think that the cambelt has jumped a few teeth on the exhaust camshaft!which would mean the exhaust valves would be open on the compression stroke - therefore no compression!

 

could it be the rotor arm has gone, just a thought if it suddenly died with no apparent reason, seen threads like this before on here

 

he has all ready said it has no compression,how could it possibly be the rotor arm,tdc sensor,or fuel pump cut out?
are you lot just winding him up or are you really that in the dark about how a yb works?

my money is melted piston/pistons.running lean at the end of a high speed run is the norm,especially if the pump is old or standard.

 

he asked for thoughts and that was nine, for fooks sake. excuse me but where did it say he has lost compression. he merely said that it sounded like he had lost compression ( whatever that sounds like )

 

sorry sean,by your last comment i dont think we need to argue over this,if you dont know what a car sounds like without compression i now understand your diagnostic post.

 

Would this not result on smoke ? number 4 went on my old car resulting in this ? or is this not always the case did not say if he was giving it some or not or again is this not always the case with melted pistons

 

not necassarily much smoke if it has only melted down the side of the pistons,if its put a big hole in then yes,even less lightly to smoke if fitted with a good breather system.hard to say without actually haveing the car in front of us but knowing cosworths it wont be anything simple.

 

lots of engine parts in stock here by the way.
5 200 blocks
5 cranks
various heads and loads of rods and pistons.




couldnt resist that could i.

 

Here TF Rallyesport i may be calling you in a few days as i might need some engine parts, gotta get my car back together then see if the engine fires up.

 

Same here, three theeth stripped off the belt by the bottom pulley, luckily (?, I was coasting to a stop, so "only" 16 valves, no piston damage

 

Is your rotor turning while the engine is cranking? This will tell you if your timing belt is fooked.

 

the cam timing is definitely out by at least a few teeth just trying to set it on tdc to fing out which one is (or both!!)

 

update!!have corrected the timing and there does appear to be plently of compression when turning the engine over by hand and there is no contact between valves and pistons.have tested for a spark at the plugs and that is fine.i think the injectors a clicking(indicating they are working aswell)im starting to run out of ideas now!! anyone got any??

 

take the head off,dont guess!!!!

 

may get a compression tester before i do that.anybody know what kinda figures i should be getting from a compression test?would a faulty crank sensor cause the injectors not to fire?

 

according to my book it should be 8.5 bar (123 psi)

 

if you got more than 120 psi then its cool i think..

the crank sensor runs the igniton sequence?
the Phase sensor doe the fuel?

(thats how i thought it was anyway)

so you corrected the timing and its still not running?

 

i deffo have the cams and crank timed up correctly!think i have the dizzy timed up right but am going to double check it tomorrow after checking a picture that was posted up earlier.

 

the dizzy could be quite easy to get a tooth out
(but it should still sorta run even if it is)
the mark to line it up on kinda hides under the plastic phase sensor cover!

you aint run outta fuel have you mate lol

TBH if the timing was that far out, then its quite possible that there is valve damage

 

have had another good look tonight and when the cambelt is off there is movement on the exhaust cam pulley.this would indiate that the cam comes away from the hvas.which leads me to believe that the valves are slightly bent.ie not allowing the springs to fully expand and therefore the hvas sit lower.does that sound about right?