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Registered User
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does Motronic re-learn optimal idle mix?
on my 89 E30/M20, i just replaced:
fuel pump fuel pressure regulator fuel pump replay oxygen sensor relay now @ start, the car runs (a) a little lower idle RPM, and (b) richer and rougher than it used to. i suppose different pressures/resistance are possible/likely after the parts replacements. (?) does Motronic "re-learn" overtime and smooth out settings? if so, about how long does that take? if not, what's next to 'cure' the rich/rough idle? |
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05-18-2011, 10:00 AM
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Registered User
Join Date: Apr 2011
Location: Indonesia
Posts: 38
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bro,
probably the fuel Pressure not match with the requirement, check it with pressure gauge hope can give a clue |
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05-19-2011, 12:22 AM
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In the shop at Pelican
Join Date: Aug 2002
Location: Los Angeles, CA
Posts: 10,459
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What do the spark plugs look like? What kind of plugs are in there?
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05-19-2011, 08:23 AM
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Registered User
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they're "Bosch WR8LC+ Super". pulled 2, look nice & clean.
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05-19-2011, 08:45 AM
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In the shop at Pelican
Join Date: Aug 2002
Location: Los Angeles, CA
Posts: 10,459
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Those are the right plugs.. This one is really odd. Have you done the stomp test to check for codes?
Pelican Technical Article: Reading BMW Fuel Injection Fault Codes Did you check the Aux. Air Regulator? Are ALL vacuum lines in good shape? |
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05-19-2011, 08:55 AM
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Registered User
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Quote:
yep, both the 'stomp test' and my Peak Research R5/FCX too say 'all OK' ... yep, all vacuum lines are OK. aux air regulator? new one on me ... i've an '89 325i E30/M20 auto trans. can you 'point' to what you're referring to @ PelicanParts catalog? Last edited by Aresby; 05-19-2011 at 09:42 AM.. |
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05-19-2011, 09:22 AM
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In the shop at Pelican
Join Date: Aug 2002
Location: Los Angeles, CA
Posts: 10,459
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Quote:
the Aux. Air Regulator is also calle dthe idle control valve. One of the things I like to do is remove it from the intake manifold and spray carb cleaner inside the mechanical portion of the valve. They sometimes stick due to oil residue. Take a look here.. Number 5 RealOEM.com * BMW E30 325i Volume air flow sensor |
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05-20-2011, 07:36 AM
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Registered User
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Quote:
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05-20-2011, 07:49 AM
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