What's your A/F on Overrun?, 'Nother D-Jet A/F Question |
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What's your A/F on Overrun?, 'Nother D-Jet A/F Question |
BeatNavy |
Mar 12 2017, 12:28 PM
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#1
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region |
For those with D-Jet, what are you typically seeing for A/F ratio on a medium to hard overrun? Based on what I've read here mine seems too rich - like in 10's and 11's. Once the RPM's drop closer to idle it bounces back up to normal idle A/F ratios. Does A/F on overrun even matter?
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r_towle |
Mar 13 2017, 11:16 AM
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#2
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Custom Member Group: Members Posts: 24,585 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
have you ever replaced the cold start injector? They leak.
rich |
BeatNavy |
Mar 13 2017, 12:07 PM
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#3
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region |
have you ever replaced the cold start injector? They leak. rich Hey Rich. No, I haven't. Hmmm...maybe I'll pull the fuel line on that and see what happens. Perhaps after the blizzard and arctic hell that hits us this week is done and gone. Could leaking injectors cause your WB to read rich on overrun? One or two injectors drips a bit....the fuel vaporizes in the hot cylinders but doesnt burn...WB reads this as rich condition? Something else to check. I have a set of recently serviced injectors. Maybe I'll swap those out. Thanks for the suggestions. It's just one of those things where I know I'm leaving something small on the table - a little mileage efficiency and/or small amount of HP - which implies something is not configured or working correctly. And that annoys the crap out of me. |
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