| Author | Message | ||
| Marc A. Thurston (Btownv12)
New member Username: Btownv12 Post Number: 42 Registered: 11-2002 |
Steve - Give me 10 days to check this out. I am having my garage floor coated/sealed so I have parked the car at my parents house. Thanks for your help. Lawrence - That is not a crazy thought! When this started happening I had less than 1/3 of a tank of gas. Maybe my gas gauge is off and as I slow down the gas is shifting away from the point of pickup OR maybe I just got a bad batch of gas??? | ||
| Lawrence Coppari (Lawrence)
Member Username: Lawrence Post Number: 636 Registered: 4-2002 |
Could it be the fuel? I have a car (not a Ferrari) that will do that with one brand of fuel. The car has 11:1 compression ratio. Just the other day I was not thinking and filled it with that same fuel. Bingo, problem of wanting to stall if I tapped the gas resurfaced. I siphoned all the gas out and put it in my other cars. Refilled tank with another brand and problem went away. I know this sounds crazy but I have one that does not like one name brand of fuel. | ||
| Steve Magnusson (91tr)
Intermediate Member Username: 91tr Post Number: 1839 Registered: 1-2001 |
Marc -- Can you do a simple test when you're having the "problem" and report back: With the car stationary and in neutral, bring the engine speed up to ~3K RPM and quickly release the accelerator pedal -- does the falling RPM "overshoot" down to ~500 RPM (stagger a bit) and then recover back up to ~1K RPM? Although it's a bit of a distraction, try watching the RPM during the slowing/"downshift" when you have the problem -- it's the same sort of question -- when you depress the clutch and lift off the accelerator pedal (to make the downshift) does the RPM fall below the usual idle RPM before you start re-engaging the clutch? | ||
| Vincent (Vincent348)
Member Username: Vincent348 Post Number: 478 Registered: 4-2003 |
Marc, doesn't sound like driver error to me. But >>I seldom get above 4500.<< that's a problem.  | ||
| Marc A. Thurston (Btownv12)
New member Username: Btownv12 Post Number: 41 Registered: 11-2002 |
My thought was this problem was driver error (less expensive to fix) rather than a mechanical problem. A couple of observations; 1. If I didnt push the clutch in all the way or let it out too slowly (during the downshift) could this cause the problem? 2. The engine is still reving too high to be downshifting. I am usually very observant of the RPM's and I seldom get above 4500. Could this cause the problem? 3. It seems to have occured on days when the weather has been very warm. Could this have anything to do with the engine stalling and KE inj ECu's that were mentioned by Steve? | ||
| James Selevan (Jselevan)
Member Username: Jselevan Post Number: 565 Registered: 6-2002 |
Marc - downshifting into which gear? Here is one that most have likely never seen, but when I first got my Boxer, it would stall when downshifting into 2nd gear. Problem was misalignment of the gate and the shifting forks, such that I was entering reverse. Reverse has synchromesh, thus no hint as to problem. Engine and car would come to halt until I put clutch in. I thought it was an electrical problem, but loosened the shifting gate and took care to get in the correct gear, and problem stopped. During engine out service we fixed it. Something to think about. Jim S. | ||
| JRV (Jrvall)
Intermediate Member Username: Jrvall Post Number: 1644 Registered: 11-2002 |
>>(Although please accept the usual disclaimer as these system are so complex that similar symptoms could have different causes).<< Ahmen to that !! ;-) | ||
| Steve Magnusson (91tr)
Intermediate Member Username: 91tr Post Number: 1834 Registered: 1-2001 |
Marc -- (If you've got a US TR with KE-Jetronic,) this is a symptom of the throttle microswitch not closing when the throttle plate returns to the idle position (BTDT). See this thread for more description/test methods: http://www.ferrarichat.com/discus/messages/256120/227910.html Is it OKish after cold start (i.e., car went below 95 deg F overnight) with water temp less than about 150 deg F? (i.e., the problem starts after the water temp gets up past about 150 deg and the KE inj ECUs go "closed-loop" in the warm mode.) (Although please accept the usual disclaimer as these system are so complex that similar symptoms could have different causes). | ||
| JRV (Jrvall)
Intermediate Member Username: Jrvall Post Number: 1641 Registered: 11-2002 |
engines shouldn't stall coming to lights, downshifting or any other time actually. get the car to your 'essential man' and have him check it out and correct the problem. | ||
| Marc A. Thurston (Btownv12)
New member Username: Btownv12 Post Number: 40 Registered: 11-2002 |
When I first purchased the car (08/02)I had a couple of weeks when I would approach a traffic light and brake/downshift, and end up killing the engine. I havent had this problem for months until last week. At this point it is becoming embarrassing. What can I do to correct this problem? |