Help 550 wont start after clutch replacement

what actually happens when you turn the key? No noise, slow crank normal crank?

Alarm issue???

 

Need more info on what you have checked out so far. Don't wanna be running around in circles for nothing. Form what it sounds like you are missing a crank signal.

 

Make sure you have the revalution sensors in the bell housing installed correctly.the one for the rhb goes on the left side of bellhousing and the one for the lhb goes on the right.there is a large connector @the back of the intake manifold that is the communication line between banks.that being disconnected usually is the cause of the p0600 error.when that is disconnected the car usually starts but only on 6 cylinders.i might be able to send the wiring diagram in pdf format if it would help.

 

Is it possible that you have plugged the crank sensors incorrectly, swapped I mean.

Regards, Jim

 

ok then if you spray starter fluid in the intake and the car runs for a few seconds it is not the crank sensors. Have you done that?

 

Well...being the dumb hillbilly I am I use the spray all the time. It is my #1 diagnostic tool. You always start with either problems with spark or fuel. I'm a home mechanic but been spray starter fluid on Ferraris for 30 years including modern ones. That does not mean its right but I'm sure if it was bad to do I would have broken something by now.

 

Cool! what 550 connectors does he have? All or some?

 

Gravity is a bugger and forces all of the engine swill into those two placed right at the bottom.

I have the 0600 error as a CAN error on the ME7.0's...I do not have it noted on my 550 list.

That start and die is something we have seen on occation related to the alarm but that doesnt equate to anything you were near. That should throw a code if it was the case. Clear all the codes again and see what pops up. I will page through my notes this evening and you will see a package in the AM. What scanner are you using? Was a hot charge thrown on the battery before this happened?


Fatso, I think I have them all now and just need to put together counts and wire seal colors to call it complete.

 

Hey that sounds great. I'll be doing a major in winter (60 degrees F in cali) now that the racecar is off the lift and back on the track so I'll be a new purchase from you soon so get my kit ready.

I've been jumping to many apex curbs making wheels up to 050" out. I can feel that and I don't like it. I experimented this summer with bending back aluminum barrels on 3 piece wheels with a home made hydralic rig. I'll test the wheels on track tomorrow to see if I'm wasting my time or not. Thoughts? Not safe to race on? You do it all the time and I'm just reinventing the wheel?

 

Dave,

By the way do you think my idea of using the starter fluid and if the car still acts the same (starts/dies) is a decent indication that the problem is in the crank sensors?

 

60* F....that is just...uncivilized! How can you remove a screw with mittens on? You will be the test mule for the 550, I didnt have time to do the car we have in the shop but had time to note most of whats needed and now have the tools for the circular connectors in hand.

Far from an expert on the wheels but when we were running the 3 pc MIM Speedlines....I got pretty good at swapping the outer halves. I tried to straighten a number of them and found they had a memory after being bent once. In hindsight taking a pick up load of those new wheel halves to the recycler....well heck, I couldnt give them away on here and I was fed up with storing them.

 

I am still trying to get my arms around all of this. The code doesnt make sense to me, the flywheel was not removed, the sensors were not removed and properly marked as to mating pairs, doesnt have spark, doesnt have fuel supply......based on the data given to me one of these variables..... Heck, I dont know, yesterday was spent chasing ghosts in a Moni T and I didnt have any quite time to focus on this one. I recently bought a generic scanner just so I could compare data with the SD, who's short comings and faulse hoods I have a pretty good grasp on. I am handicapped in that area because I have always had the proper tools/testers and a scope to test and verify failures. Learning what this new scanner is telling me is has a whole new ball game and learning curve and is not completely accurate in its displayed faults. I have a 99 550 in the shop and now have a plan in place to attempt to duplicate this problem....I hope I have time this AM before its picked up.

 

We had a 456 come in on a wrecker a few years ago from another shop who had installed a clutch and then it would not start. They spent a week trying to figure it out before bailing and sending over to us.

Since we did not do the R&R of the clutch, I have no idea what their procedure was but it should be noted it might have been their first attempt at Ferrari repair/service.

I just looked up my notes on the repair order and what we saw on SD-2 was below:

CEL ERROR CODES FOUND:
LEFT BANK:
REVOLUTIONS SENSOR: CIRCUIT INTERRUPTION
STROKE SENSOR: S.C. TO EARTH OR LOWER THRESHOLD OVER LIMIT
THERMOCOUPLE CONTROL UNIT: SC TO +BATT OR UPPER THRESHOLD OVER LIMIT
CAT TEMP TOO HIGH: S.C. TO +BATT OR UPPER THRESHOLD OVER LIMIT
RIGHT BANK:
REV SENSOR
STROKE SENSOR

We cleaned the connections of the sensors and the car started and ran fine.

Then we replaced the CAT ECU for the Cat Temp CEL

The car died again and we went back to the sensors and the speed sensors for each bank ohm'd higher than spec so we replaced both. Never saw the car again so I assume all went ok or the other shop was too embarrassed to call us back.

All I can think is somehow the cables were compromised or stretched in the process of their clutch R&R???

 

OK...I plan for taking the car apart in November about Tgivng time December at the latest. I'm not on a particular time plan. Let me know when the kit is ready and I'll be ready to buy it and install it. Eventhough my 550 runs well I know it can run better with less future faults. The response of my 348 to gutting out the electrical system for racing was down right amazing. I swear there is some extra horsepower right there if we could rid ourselves of some electrical drain.

 

There is absolutely zero question in my mind regarding performance gains. For obvious reasons the twin ECU cars show even more noticeable gains when both banks are working together in unison. On every single example but one the gains could be felt seat of the pants. Oddly and unexpectedly...but understandable now, gains could be felt on our 355 5.2 and 2.7 fusebox fix test mule's as well. When Bosch designed things to run on 12 volts...they expected just that, they just never factored in dealing with "apprentice Lucas" electrics. Its all good, we understand that all now.


"""All I can think is somehow the cables were compromised or stretched in the process of their clutch R&R???"""

I find that the most likely explination but do not understand the dynamics of it if the flyweel/P. Plate was not touched. I have seen numerous times where once a connector is disassembled and reassembled it will fail due to corrosion now pushed between the contacts....gues thats not this case here.

 

Hey, cut the Lucas jokes!!

Just fnished a 308 with running problems, they all went away after careful attention to grounds and sensor connectors. OK, it's still a 81 308.....

Dave, do you notice an improvement in the exhaust note on 355? I have a couple where that little "hiccup"/"burble" from the lean burn bothers the owners?

Brian

 

Have you checked fuel pressure on this car? you did say you had to reset the inertia switch. my question is why was the switch tripped?

on the 550, we have had numorous problems with the inertia switch on 550 I think due to the location in the engine bay and proxmity to the coolant tank.

Maybe time to start checking the basics.

Best regards, Jim

BTW Dave,

I had tried the kit you have for the connectors and the hoses. The kit you made is very complete, the connectors and hoses are top notch. Very good solution for the connector issues for these cars. Liked the tools you included.

I was very impressed and I will have to call you as I think this is good to do during a major service.

Regards, Jim