Has anyone ever had a problem starting a 348 after it was warm/hot that wasn't related to the typical problems? I will check that tech tips list. I'm trying to trouble shoot a problem. Car starts fine when cold. Getting it started after it's warm/hot is not good.... takes a long time, mutliple times cranking. car runs perfectly after it is started. thanks in advance.
Have you read the threads about 348 hot start problems caused by the flywheel? You can have a car with no problems at all in the injection and ignition systems, and it still won't start when hot due to leakage of the special Kluber grease in the flywheel. If it is indeed a flywheel problem, you should have two noticeable symptoms: 1) The is a distinctive "rattling" sound coming from the back when you shut off the engine when hot. This is the internal parts inside the flywheel, which normally should be damped by the Kluber grease, moving against themselves. 2) There is a greasy grey residue on the bottom of the flywheel housing, coming out around the perforated panel. This is very easy to check, it's at the very back of the drivetrain, just in front of the center of the rear bumper. Just get down on your knees and look, and feel. There have been MANY instances related here (including on my own 348) where the flywheel has caused exactly the symptoms you are reporting. Before rebuilding my flywheel, I sometimes had to crank the engine on and off for ten minutes before it would start. Now it never takes more than one second of cranking.
Yeah! I did notice that rattle sometimes when hot after I shut it down. thought that was normal evidently not. I'm new to the car. trying to start it back up sounds like the timing is off. pops out the exhaust sometimes. sometimes rattles slightly. Once it's started it's like nothing ever happened, runs perfectly.... How do I get the clutch and flywheel out? Do I have to remove the exhaust? I'm the guy that had problems with A/C and have pictures on check a few things but don't know how to post them. If I do this flywheel thing I'll document the DIY proceedure for someone else.
It could easily be your flywheel grease, but...before you go yanking out your clutch and flywheel, try this simple test first in order to verify that's your problem. Start the 348 when it is cold, now drive it until it is warm/hot. Turn the ignition off and as soon as the engine has stopped, immediately try to start it up again. This will now make two "starts" in sum that you've made for this test (one cold, one when hot). This test should help you pinpoint if the problem is a failing battery (cells can fail when hot that work when cold), flywheel grease issue, or fuel pressure regulator/leaky fuel injector/check valve...because: 1. if the car does immediately start back up when hot per above 2nd start, then you probably have a fuel pressure issue (e.g. fuel pressure regulator/leaky fuel injector/check valve/fuel pump, etc.). This is because it takes a minute or two for even a failing pressure component to allow the fuel pressure to drop after the engine stops, so a quick restart of the engine when hot inside that first minute would act as though you didn't have a fuel pressure leak (faulty component hasn't had time to bleed away fuel pressure yet). 2. if the car has great difficulty starting back up immediately, then fuel pressure isn't the likely issue and instead you probably have a flywheel grease problem or bad battery. 2a. Listen to the transmission as the engine stops. Do you hear a pronounced rattle as if rocks were inside a tin can that was being shaken? If so, could be a Flywheel Grease (or related leaky seal) issue. 2b. Have your battery load tested. 2c. Swap how you started your 348 when hot. If you tried re-starting it with clutch depressed, transmission in gear, then swap and instead try a 3rd start when hot with clutch pedal NOT depressed but transmission in Neutral, or vice-versa. Also, be sure that you are turning your ignition key to Run, not Start, for at least two seconds before turning your key to Start (let the fuel system charge up). Hope this helps! NOTE: Fuel pressure regulators are Ferrari part number 147281 (Bosch #0 280 160 731 available for $138 at thepartsbin.com), about $440 each at Ricambi or an outrageous $500+ at Ferrari dealerships. But...I'm reasonably sure that they are just AC Delco FP regulators. The AC Delco part number is 217-2119 and the GM part number is 35476530. You can get them for $81 each here if you don't mind forgoing the pretty yellow Ferrari shipping box: http://www.autopartsgiant.com/CAT_FRAMEX.cfm . The STANDARD MOTOR PRODUCTS FP Regulator # PR171 (~~$75 at RockAuto.com) should work on our 348's, as well. The AirTex Fuel Pressure Regulator for our 348's is only $59 at RockAuto.com, too. These fuel pressure regulators should all be exactly the same, and interchangeable at will.
No Doubt... about it. thanks for everyones help. I believe I found the problem(s). I went throught and put some stabilant on all the connectors in the engine bay found the clamps completely loose on the engine side of the MAF torque and vibration of the engine further loosened both hoses to the throttle bodys so un-metered air... one was definitely loose enough to by-pass air. Also did the No-Doubt test and flywheel seems OK but when I checke the fuel pressure and regulator the left bank regulator was leaking fuel through the vacuum port.... didn't even bother with the right side, need to replace both right. I am counting on this being the hot start issue. warmed the car up to temp, shut it down, wait 20 seconds, start up perfectly, wait 10 minutes, have to crank the living heck out of it to get it started.... Thanks again all. Would it be useful since I'm going to changes these regulators to do a DYI on it with pictures for other??? If you've never been to the Porsche p-car.com DYI you should. it is an excellent reference! No-Doubt check out what they've done. Do you think we could add something like that to your page for the 348? i don't know how many people actually wrench on these cars.....
Please take pictures. Changing the fuel pressure regulators is something that quite a few 348 owners could do if they had pictures of the process in front of them. Just need a couple of (or even just 1) wrenches and you don't even have to jack up the car!
I changed out that leaking fuel pressure regulator yesterday and it seems to have corrected the hot start problem! Time will tell.... the old one was really bad. I dumped fuel out of the vacuum port. I bought a new regulator locally at an auto store that crossed the Bosch originally on the car. the only difference was that the Bosch part was yellow anodized and cost $160 and the US made part was $60 and silver. I want to thank eveyone for their help. I did take DYI pictures while I replaced it if someone else ever needs to do it. don't know where to post them. wasn't that bad of a job. about 2 hours and car is running great! thanks again all
Yes please, i think i may be having pressure problems on my 355. http://www.ferrarichat.com/forum/showthread.php?p=136083632&posted=1#post136083632 Please post what you can for me, that would be great
