Technical Engines Died

[Bullitph29]

Just fitted a new CPS & still no joy,

All the Timing on the cambelt is spot on,
When trying to start the car with the foot on the acceleration pedal the airfilter is popping which im not sure if this would be anything but just mentioning.

 

[s and b]

Just fitted a new CPS & still no joy,

All the Timing on the cambelt is spot on,
When trying to start the car with the foot on the acceleration pedal the airfilter is popping which im not sure if this would be anything but just mentioning.

see post 2 then
and do a compression test AND a vacuum test if possible
back to basics

 

[fingers99]

Popping back often means slipped timing (or bent valves). Something is very wrong.

 

[Bullitph29]

Had my mate look over it, ( He is a mechanic not just some who doesnt know what hes doing lol )
He doesnt think anything is wrong with the timing or valves,
Timing is spot on as he looked at that & the lines line up perfectly,
Going to see if theres a spark, if there isnt then i going for the camshaft sensor to see if that gone,
does seem very strange how it just cut out & now wont start.

 

[s and b]

Had my mate look over it, ( He is a mechanic not just some who doesnt know what hes doing lol )
He doesnt think anything is wrong with the timing or valves,
Timing is spot on as he looked at that & the lines line up perfectly,
Going to see if theres a spark, if there isnt then i going for the camshaft sensor to see if that gone,
does seem very strange how it just cut out & now wont start.

well we keep telling you or your mate (mechanic) to do basic checks but you seem to have set your own ships course so i wish you a bon voyage

im out

 

[Bullitph29]

Thought i had done the basics, Iv Done:

Cleaned the earth cable from battery to gearbox
Changed the CPS
Checked to see if fuel was getting through
Checked the timing to see if it all lined up
Cambelt is new

What else apart from this should i be doing??????

 

[fingers99]

Fuel is getting through to where?

But, compression test is the obvious next step.

Will be crankshaft sensor (if no fuel and no spark) not camshaft sensor (don't think that engine has one).

Those engines (essentially the Alfa 16v twin cam) do not suffer idiots (or overdue cambelt changes!) gladly.

Cambelt is new, but who fitted it?

 

[Bullitph29]

Fuel is getting through to where?

But, compression test is the obvious next step.

Will be crankshaft sensor (if no fuel and no spark) not camshaft sensor (don't think that engine has one).

Those engines (essentially the Alfa 16v twin cam) do not suffer idiots (or overdue cambelt changes!) gladly.

Cambelt is new, but who fitted it?

I havent taken the injectors out but took the line on the rail & fuel was getting through,

There is a camshaft sensor as its behind one of the top cambelt pulleys as iv taken the cover off to check to see the timing & thats all spot on,

Havent done a compression test yet but will do
Also going to check if theres a spark

The engine had a full rebuild due to the cambelt snapping,

 

[dave]

I

The engine had a full rebuild due to the cambelt snapping,

ah is it timed on the correct stroke :idea:

 

[Bullitph29]

ah is it timed on the correct stroke :idea:

All i can say it that the marks on the pulley line up correctly with the line one the engine on all three places.

 

[dave]

they would still line up even if engine was on wrong stroke

 

[Bullitph29]

they would still line up even if engine was on wrong stroke

Could you give me some info on how i can do this?

The car was running fine before this tho

 

[dave]

remove belt and cams so all valves are all closed, turn crank 1 full turn, refit cams and belt

 

[fingers99]

I havent taken the injectors out but took the line on the rail & fuel was getting through,

That just shows that the fuel pump is working.

The Alfas, at least, use locking tools which bolt the camshafts into position. Fitting a belt on these without the right tools (even different engines use different tools because the cams are a different shape!) is a recipe for disaster. They're fussier by far than the 16v FIRE engines.

Compression test if it sparks.

Cambelt breakeage on the FIAT/Alfa twin cams almost always results in bent valves and dinged shell bearings. You also need to check for damage to the pistons, valve guides and valve seats. The manufacturers quoted a cam belt replacement mileage which was nearly twice what it should have been.

 

[Bullitph29]

That just shows that the fuel pump is working.

The Alfas, at least, use locking tools which bolt the camshafts into position. Fitting a belt on these without the right tools (even different engines use different tools because the cams are a different shape!) is a recipe for disaster. They're fussier by far than the 16v FIRE engines.

Compression test if it sparks.

Cambelt breakeage on the FIAT/Alfa twin cams almost always results in bent valves and dinged shell bearings. You also need to check for damage to the pistons, valve guides and valve seats. The manufacturers quoted a cam belt replacement mileage which was nearly twice what it should have been.

When the cambelt snapped it did the pistons & valve in which resulted in them being replaced & £800 later the car has been running fine up N til not

I have replaced the spark plugs recently with some what cheapy one would that make any difference, id say they where changed about 400-500 mile ago,

 

[fingers99]

On those engines you have to check the big ends. Only a specialist would be aware.

Use the recommended plugs. Fussy, fussy, engines, pretty high state of tune for an over the counter one.

 

[Bullitph29]

Right guys,

Iv just had a look to see if iv got a spark & i have NO SPARK

What would be the next course of action????

Iv just been checking the net & come across this which seems to be the same problem im having & the CAMSHAFT SENSOR was the fault,

http://www.alfaowner.com/Forum/alfa-155/247709-help-with-1-8-engine-no-spark.html

 

[fingers99]

Worth a go. Without access to (at least) a wiring diagram I can't see, for the life of me, why a cam sensor would prevent a spark.

I'm assuming there is fuel past the injectors...........

 

[Bullitph29]

What would cause a none spark?????

 

[RaulCarnahan]

What would cause a none spark?????

Coilpack? Or even engine wiring loom?