 Request Advice: Running Lean above 4000RPM |
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| rbzymek |
 Aug 17 2020, 05:19 PM
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Member  Group: Members Posts: 195 Joined: 5-April 19 From: Northville, MI Member No.: 23,013 Region Association: Upper MidWest 
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So the set up is:
Low miles 2056 running L-Jet Blue coil with points, no ballast resistor or wire Timing checked Point gap set so the dwell should be close AFR meter on board Typical AFR during cruise is 11.5 to 12.5 The fault is: As I approach 4000 RPM the AFR spikes to 18 and will not accelerate (lean misfire) I swapped the ECU with a spare and there was no difference. The engine was running fine prior. It seems like the ECU is not getting a clean tach pulse so the fuel may not be scheduled correctly. I suspect the coil or the point capacitor. Any other possibilities? Thanks in advance. Regards, Ray |
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