Ignition help...Andy, Mark and I stumped :), not typical problem...Link EFI |
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Ignition help...Andy, Mark and I stumped :), not typical problem...Link EFI |
Mueller |
Aug 7 2005, 07:58 PM
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#1
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
Static timed at 10°, no mechanical advace, the ECU controls spark (the ECU does not add advance from 0 rpm to 500 rpm)
Car starts up fine, once I get the revs to 2500 I get spark scatter...we cut a hole in the dizzy cap and confirmed this In the picture, the rotor turns clockwise. White marks are open windows for the trigger, red mark is the trigger....black marks on the body of the dizzy are the locations of the leads for the sparkplugs. I changed the location of the LED (red mark) and it did not seem to help at all...... Attached image(s) |
lapuwali |
Aug 7 2005, 08:31 PM
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#2
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743 |
Are you still firing the ignition through an MSD/Mallory CDI? How bad is the scatter?
Seems you've had an awful lot of trouble with the ignition side of this system. Is the optical pickup their setup, or yours? My wild guess would be you simply have a noisy tach signal, which is a problem you've had before (and a problem you had with MS, too). Does the Link do any datalogging? If so, perhaps you can watch the tach input to see if it spikes. If not, you're going to have to borrow a scope from someplace. Something in that car is generating a lot of noise. (spark scatter, bd, is when the spark starts to jump around rather than remain where the timing says it should be) |
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