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Old 01-11-2015, 09:45 PM   #3
242Fast
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Join Date: Sep 2004
Location: SC
Default Undiagnosed misfire or mis-injection

This was a daily driver for my in high school. The car had an intermittent misfire, constant speed driving it felt like the injectors just skipped over one cycle.

The previous owner had put in a 740 fuel injection system, still used the '83 turbo ignition if I recall. I don't remember which LH it was but it used a throttle position switch that had a closed-throttle switch inside.

I started replacing pieces of the ignition system, MSD 6A, and adding fuel pressure gauge. Neither of these helped the issue and ultimately the issue remained undiagnosed.



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