Stutter/ Miss at 4000 rpm

First what model mondial ?
If mondial 8, QV or 3.2 : cleaning filter inside fuel tank (where the fuel line starts that goes to fuelpump)...
After that thinking of cleaning plunger in fuel distributor after checking air flow sensor plate is travelling free.

Guido

 

Try a little marvel mystery oil, cleans out a fuel system quite nicely, and can't do harm. Might check the plug extenders, look for signs of a short. I presume your spark plugs are fresh? Probably something simple, worth ruling out some easy things first.

 

I went into my history record as I had such issue.. My Warm Up Reculator (WUR) was not working properly and I rebuild it.

You might want to do a fuel system pressure first to see if the pressure is "right".

I always recommend people to change their injectors when they are old. I replaced all my rejectors when not having smooth run. They eventually wear out since they are mechanical. IMHO you just need to do this when you do not know the history if they were replaced or not. A fellow Fchatter replaced them just recently. He had no issues.. He noticed a better pick up, smoother run and going faster into higher refs. He knows his car as no one else as he owns it for more then 20 years and he was amazed mentioning he should have done it earlier.

 

Beside accumulator and fuel pump.

Guido

 

Guido means that the fuel filter is next to the accumulator a bit more up though. It's hard to miss the aluminum canister, that's the filter.

 

I whas getting sleep to when I wrote it...

Guido

 

Cap charred contacts could be moisture in there, perhaps a hairline crack in the plastic causing arcing. The rotor might be worn. Aftermarket caps are of mixed quality. Might help to see a pic.

 

Doesn't harm to bolt it off to have a look Even if I would not have an issue and the car would be new to me it is one of the things I look at.

Also check your 8 extenders if they do not have pin burn holes.

 

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RTV is not a good sealant for gaskets.
The excessive bead can squeeze into the inside of the case, break off, and cause oil passage blockage.

 

Timing is not adjustable. It is set internally by two Digiplex units. Timing can be verified by simply using a timing light. If the tdc sensor fails/is failing, it shuts down both banks.

 

If the tensioner is working properly, it is unlikely that the belt can jump a tooth.
No harm checking though.

 

Could be. The first snatch will left the belt for sure! and I guess you have about 10 of these.. Check if it is on time. Seeing this I would do this manuel with the refences on the flywheel and the cams. (you will need to take the camcovers off)

Flatten this area of the pulley as it looks this is eating away the belt. I really wonder how someone managed to do this and not think it can harm the belt. Good that you found this even if it is not the root cause!
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I'd go further MvT and say that the belt is damaged and should be replaced immediately.....sorry Anthony but as MvT says your damaged pully is to blame
Regards Bell

 

I cannot disagree with you! IMHO it is an obvious thing to do