I'm depressed, 2 hours of dyno time for nut'n....., Ignition cr@pped out, wouldn't restart:( |
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I'm depressed, 2 hours of dyno time for nut'n....., Ignition cr@pped out, wouldn't restart:( |
Mueller |
Nov 1 2005, 06:12 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 |
What a waste of a day off.... (IMG:http://www.914world.com/bbs2/html/emoticons/headbang.gif)
I knew it was going to be one of those days when my laptop wouldn't communicate with the Link ECU, luckly I brought a back up unit that I normally use, it's just that the 1st laptop I had was way, way faster...(normally) Mark D (McMark) showed up and helped stomp on the gas while I played with the laptop, we started @ 1000rpm and went up in 500rpm increments...strange feeling with the pedal @ WOT in 4th gear and the motor would not go over the set load... I kept hearing a misfire and then all of a sudden under load it got real bad, we changed out the distributor cap since the original one had some viewing holes cut into it for timing....it just got worse...then I noticed the air intake elbow was a little loose so I fixed that...I was hopeing that was it...nope still really bad misfires coming out of the exhaust....finally I load a new MAP setting and the car seemed to be idling better, then all of a sudden the car dies..."hey Mark, did you turn it off???" "nope" "oh $hit" I get out the voltmeter, I have voltage like I should, no apperant spark.... So, it's one of the following I think (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) a bad MSD box, a bad optical sensor in the dizzy or the Link is messed up....I have a check list of items to go over before sending the Link back for testing.... I think i want to replace the optical sensor within the dizzy with a hall effect unit, any leads or ideas? McMark dyno's his car, I'll let him tell you about it...he had better luck than me |
lapuwali |
Nov 3 2005, 07:21 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 |
Multi-spark boxes usually confuse adjustable timing lights, just as wasted spark systems do (the knob will no longer be accurate in terms of degrees of advance). However, most multi-spark systems are done by 3000rpm or thereabouts, so if you follow the usual rule and actually time for max advance, you're alright. Some of the newer whizzo timing lights have adjustments for multiple sparks per rev (wasted spark), though I don't know if any of them (yet) adjust for multiple sparks per event.
For non-adjustable timing lights, you'll get a flash per spark, and one of them will happen at the "right" time (the actual point of advance), so you'll still see the mark. Your eye is slow enough to respond that the multiple flashes shouldn't hurt, although the mark may appear to be more "ghostly" than usual. So, for timing with a multi-spark box on a 914, mark the fan for max advance as well as TDC, and use a non-adjustable light, or an adjustable one set to 0. |
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