365 GT 2 + 2 restoration

[A.D.]

Hi Tom,

The fuel leak is from the fuel filter assembly inside the engine compartment-towards the right headlight.

Apparently the diaphragm is torn-we are looking for one here that will fit.

Once this is done, will synchronise the carbs and get the car on the road-will keep you posted.

As always a BIG thank you for all the help information and guidance.

Best

[A.D.]

the engine is missing and two plugs have fouled

any ideas what this could be due to?

am going to do a compression and leakdown test tomm

[stacyoblenes]

could be as simple as idle mixture too rich.

could be oil fouling from bad rings


Stacy

[tyang]

Hi A.D.,

See if you can get a "spark checker." It usually looks like a pen with some kind of small light. It works on induction, and will light up if it senses ignition on the spark plug wires. You hold it next to each wire by the cylinders to make sure you're getting spark to each cylinder. It will light up every time that cylinder fires.

Without this tool, you can pull each wire as the engine is running to see if the spark jumps the gap between the spark plug wire and a ground. BE VERY CAREFUL! Anyone who as been around cars long enough can tell you how unpleasant 20,000 volts can be when it finds a path through your body! If you have a pacemaker, I wouldn't do this!

If you have spark to each cylinder, then check the carburetors. Stacy could be right about the oil fouling. If the rings are leaking, you may have to run the engine a little bit to see if the rings seat a little better. Rust in the cylinder walls could be causing oil to get past the rings, fouling the plugs.

Tom

[Rudy van Daalen Wetters]

Is the firing order correct, ie. the plug wires on the right
plugs in sync with the firing order? Which two cylinders?

Rudy van Daalen Wetters
1963 GTE s/n 4001
1966 330 GT s/n 8705

[TOMKIZER]

I always suspect ignition wire continuity as the culprit. Getting consistently good connections at the distributor end of the wire is really difficult and often short lived.

Tom Kizer

[365 GT 2+2]

AD!

Can you post some updated pictures of your Queen?!

[A.D.]

both cylinders are in the same bank of cylinders (ie on the same side)

the rings are brand new-plugs are correct as per cylinder firing order-the cylinder walls showed no rusting while we had the engine apart

Checked the entire ignition system from the points to the plugs-there were a few issues at the distributor end which have now been fixed-the missing improved but it still there-

did valve setting again, now that the engine has been run for some time (had kept them a little loose initially in order to let everything settle in)

so now concentrating on the carbs-now switching the carbs around to see if the problem persists in the same two cylinders-if it changes to another set of cylinders we will know its the carbs, which we will then investegate further

fingers crossed.

will post pictures "before" and "after" once this problem is fixed and i have the car back from the engine shop

[A.D.]

an update

transferred the carbs around and the problem got transferred to another set of cylinders.

it is therefore something to do with the carbs.

any ideas what i should check for?

best

[Rudy van Daalen Wetters]

Fuel cutoff needle first, float level, plugged jets, mixture screws.

Rudy van Daalen Wetters
1963 GTE s/n 4001
1966 330 GT s/n 8705

[TOMKIZER]

Running great, then two same-side cylinders stop working and the two plugs foul? Are the two bad cylinders adjacent? If it's due to one carburetor, then it should be either the front two, the middle two or the rear two on one side. Did the bad cylinders stay on the same side of the engine when the carbs were moved (one barrel of one of the carbs)? What was the plug fouling, oil? wet fuel? dry carbon? More details about the problem will aid diagnosis and save time without having to experiment too much.
Tom Kizer

[afwrench]

an update

transferred the carbs around and the problem got transferred to another set of cylinders.

it is therefore something to do with the carbs.

any ideas what i should check for?

best

You are doing well by slowly zeroing in on the problem. It looks like it is related to one throat of that particular carb. Probbly not the float as that would foul up the entire carb but dont count that out.Look carefully at the mixture screws. Perhaps look down the throat as the car is running to see if drops of fuel are just running into that side, dont rev it while looking in case of backfire, perhaps use a small mirror. Did you say that Pierce Manifolds redid them for you? If the problem continues to be elusive give them a call. Good luck, Mike

[A.D.]

an update:

opened the jets power valves needles etc on one carb-cleaned thoroughly and refitted back on the car
shows a huge improvement
now will carry out for the other two carbs
then will synchronise the carbs
will keep you posted

best

[Yale]

You are going to be the pre-eminent vintage Ferrari expert in India!

[Timo]

Hi A.D.
I'd like to offer an advise before You go further. Right after cleaning Your other carbs and before making any further attempts to run the engine (or adjustments), do Yourself a favor and completely and thoroughly flush/clean Your cars fuel system from tank-to-carbs again and then replace all fuel filters (again). Having had visited Mike Pierce's shop and knowing little about his work, I'm quite confident that the debris You found from Your carbs is coming in with fuel, either from the lines or the fuel tank.
And initially, it wouldn't be bad idea to add couple of disposable "aftermarket" filters, one perhaps near the tank and another right before the carbs, just to prevent Your latest "nemesis" re-occurring.
Good luck.
Timo