1.9 mjtd 8v engine problem - Alfa Romeo Forum
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(Post Link) post #1 of 11 Old 19-11-12 Thread Starter
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1.9 mjtd 8v engine problem

Hi



Grande punto ralenti inestable 1 - YouTube

Grande punto ralenti inestable 2 - YouTube

I scaned the ecu with FES and only shows P0335 crankshaft rpm sensor.

-Crankshaft sensor is replaced.
-Cambelt timing is ok
-Camshaft is ok
-Compression test:

cylinder nº1: 33.7 bar
cylinder nº2: 32.4 bar
cylinder nº3: 33.4 bar
cylinder nº4 31.7 bar

Any idea?next step I'm going to test the nozzles on bosch diesel service. Thanks
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Get it checked by a specialist :-)
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compression of 33bar how did you measured it? Should be 18 or so.
Sounds like worn and leaking injector.
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If compression is really ok (the measured values are strange, I would expect ~20bar, not 33), then it looks like your injectors are way off.

Corrections of +-3 are critical. My bet is that injector #4 is leaking, and also probably #1.
I would get 2 spare used injectors and replace #1 and #4.
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(Post Link) post #5 of 11 Old 21-11-12 Thread Starter
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The injectors are tested on bosch diesel service and they are ok. What happend???
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Sounds like missfiring to me. Return back to the compression check. The values you logged are valueless.
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could be a worn camshaft , or a broken dmv
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(Post Link) post #8 of 11 Old 30-12-12 Thread Starter
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Yep!

Finally I found the problem :

Fallo rueda fónica sensor RPM - YouTube


Trigger wheel of cranckshaft sensor wtfck?
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(Post Link) post #9 of 11 Old 08-01-13 Thread Starter
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Somebody with the same problem?

This trouble is so strange, what is the possible cause? I hope repair it this weekend
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i've heard of it once before , but no possible cause was found there..
very very strange phenomenon
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(Post Link) post #11 of 11 Old 27-01-13 Thread Starter
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Finally I replaced the trigger wheel nuts and car runs fine
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