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Testing Cold-Start Injector on B21F 200 1981

uid 17340's pic
posted by  Nickvjr on  Sat Dec 25 20:57 CST 2004
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last visit: Thu Sep 4 11:15 CST 2014
[RELATED]

I would suspect that the #1 injector could cause a slightly rough idle as it is not keeping up with the other three injectors as far as the amount of fuel goes (i.e. a some what lean mixture). I would put my money on an air leak at the bellows or some where else in the intake system that is causing your rough idle. Like ALEX mentioned the K-Jet System cannot compensate for any unmetered air so any type of air leak in the system will cause the mixture to go lean and give you that rough idle. Check the hose connections to and from the AAV (Air Aux. Valve) as these hoses sometimes look fine but are hard and brittle due to age. Good Luck & Keep Us Updated!!!

Happy Holidays!!!

Sincerely,
--
Julio Meza

1979 264GL B27F 125K --> BW55->M46, CLS, IPD Sway, 81+ Dash, Gauges, Flat Hood & E-Codes

1979 262C B27F 160K --> Restore Project w/Possible B280F

1984 245DL 214K -->Wifemobile






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