| Author |
Message |
mna (Boxerman)
New member
Username: Boxerman
Post Number: 9
Registered: 12-2001
| | Posted on Sunday, August 11, 2002 - 9:07 am: | |
David - thanks for your suggestions. I'll have a go through with the distributor as we've been through the injection and ignition systems with some major improvements but it still runs like ••••.
Please keep the suggestions comming! |
David Feinberg (Fastradio2)
Junior Member
Username: Fastradio2
Post Number: 128
Registered: 4-2002
| | Posted on Friday, August 09, 2002 - 11:26 pm: | |
Not to sound like a total AH, but....without the proper test equipment and knowledge, one can throw a whole lot of money and wasted time trying to fix/diagnose driveabiblity problems on these cars...With all due respect to your mechanic, this type of repair methodology is the primary reason why Ferraris have the reputation of being incredibly expensive to repair...
As your mechanic is running out of ideas, and the checkbook is taking a beating...Now might be the time to go back to basics...and put the spending on hold.
BBs (all models), with the horizontally mounted distributor can exhibit problems with sticking advance weights, broken springs...or even seized advance weights. Check and verify the distributor timing advance curve, particularly in the range you describe...I have been down this road many times with my BB!!
Verify that the cap and rotor are in perfect condition...without presence of oil residue in the distributor.
Verify left side to right side syncronization, as for all practical purposes, they are two totally independent injection systems.
Verify system pressure at each fuel distributor, at the specific RPM...They should be near identical.
A little sniff up the exhaust will also verify the intregrity of the f.i. system...
I believe that after these tests are done, and verified to be correct...your BBi will run properly.
Regards,
David |
mna (Boxerman)
New member
Username: Boxerman
Post Number: 8
Registered: 12-2001
| | Posted on Friday, August 09, 2002 - 8:42 pm: | |
The regulator was determined to be faulty during the process of correcting this problem. The other was deemed to be fine but I think I'll replace it just on principle.
Keep the ideas coming! |
Henryk (Henryk)
Junior Member
Username: Henryk
Post Number: 139
Registered: 8-2001
| | Posted on Friday, August 09, 2002 - 5:13 pm: | |
mna: If it ran better with replacement of one warm-up regulator, than I would think that the other one should also be replaced. Even though there are two "separate" injection systems, one for each bank, they are interconnected with a fuel line connecting the two warm-up regulators. The "bad" one may be sending wrong signals to the "good" one.
What symptems did you have to warrant replacement of the regulator? |
Dr. I. M. Ibrahim (Coachi)
Junior Member
Username: Coachi
Post Number: 80
Registered: 5-2002
| | Posted on Friday, August 09, 2002 - 4:28 pm: | |
somebody suggested the advance in the dsitributor???? I really don't know just heard that |
mna (Boxerman)
New member
Username: Boxerman
Post Number: 7
Registered: 12-2001
| | Posted on Friday, August 09, 2002 - 1:17 pm: | |
The car runs great with the exception of this RPM range - hot or cold. Its real strong on the top end and weaker on the bottom end but runs well outside of this RPM band.
I'm not going to do it myself but my guy is out of ideas and I'm getting to the end of my check book. I have replaced a (not both) warmup regulator with some improvement maybe I should do the other one.
Please keep the suggestions comming, I'll entertain them all! |
Steve Magnusson (91tr)
Member
Username: 91tr
Post Number: 901
Registered: 1-2001
| | Posted on Friday, August 09, 2002 - 8:44 am: | |
mna -- What K-Jetronic reference materials do you have available? If you're sure that the ignition side of things is OK (then as Henry suggested) you're down to things like seeing if 1) the control pressure is doing something strange (causing the fuel distributor to do something strange) or if 2) the fuel distributor is doing something strange on it's own. Are you going to try to DIY? Everything else OK? (e.g., higher RPM pulls smoothly, lower RPM is good, hot or cold it's the same, etc.) |
Henryk (Henryk)
Junior Member
Username: Henryk
Post Number: 138
Registered: 8-2001
| | Posted on Thursday, August 08, 2002 - 10:30 pm: | |
Possibly one of your "warm up regulators", since they are interconnected. |
mna (Boxerman)
New member
Username: Boxerman
Post Number: 6
Registered: 12-2001
| | Posted on Thursday, August 08, 2002 - 9:03 pm: | |
Anyone have an idea of whats causes a surge in my BBi at the referenced rpm level? Don't suggest:injectors, wires, cap, coil, or digiplex as they all have been replaced. Thanks for any ideas. |