Ferrari Mailing List: Re: Problems with 308

[robert_h_bowser [at] juno.com (robert_h_bowser]

George -

Timing marks are on the flywheel.  You have to remove the little cover directly 
below the oil filter to see them.

Sounds like you have spark, but it is just coming at the wrong time.  With the 
sudden onset, it could be the control units, the crank position sensors, or 
your cam may have simply slipped a tooth or two.  I'd remove the 5-8 cam belt 
cover and verify the cam belt is properly tensioned and has all its teeth.  Or 
maybe you can do that with mirrors and a flashlight.  If your tensioner bearing 
is failing, it could cause enough drag for the crank sprocket to jump a tooth 
on the belt.  Not likely, but something to check.

Bob
'01 Corvette Z06
'78 308GTS



-- <georgedodson [at] comcast.net> wrote:
 I finally got some time to look at the 308. In a post from a couple of weeks 
ago I wrote that the engine lost power and stopped during high speed slalom 
down a steep hill. The engine starts, barely, won't idle, runs rough and there 
is no power (also no bad mechanical sounds from the engine). Neither of the 1-4 
or 5-8 warning lights are on. It turns out that what power there is comes from 
the 1-4 bank. Removing the coil HT wire from 5-8 has no effect. However, there 
is spark from the 5-8 coil! I found this by putting a HT cable from the 5-8 
coil to near the block and letting it arc over. With no coil HT wire there is 
some internal arc-over in the 5-8 coil visible, but not when it is arcing to 
the block or connected to the distributor. The 5-8 distributor looks fine. The 
5-8 and cap rotor are OK, no sign of tracking in the distributor.  I inspected 
the control modules. The compartment is dry and there is no sign of corrosion. 
I pulled the cables and cleaned the contacts, but that didn't help. I ran out 
of time before I could swap the module cables to see if the problem stayed with 
the cables or went with the modules. One question is; since there appears to be 
spark to the 5-8 bank, is there some external timing mark that I can look at 
with my timing light to see where the spark is coming in time? I can't find any 
reference to a timing mark. I can only imagine how much a control module will 
cost.

 

Regards,

George
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