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7 Series - E23 / E32 (1977 - 1994)

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Old 06-30-2013, 02:59 PM
david76 david76 is offline
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Location: Iowa
Join Date: Jun 2013
Posts: 6
Mein Auto: 1994 740i

I could use some help on a 1994 740 I bmw.. I got an o2 sensor air switch that out ran fine for 15 minutes. Then started losing gas when I would try to accelerate. Now I'm getting an air fuel mixture error. Odd thing is when its in park it revs just fine and get gas. Soon as I put it in drive and try to go it won't accelerate more than 20 miles an hour. I've tried checking for vacuum leaks have not had any luck finding any. Can anyone help or give a suggestion

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Old 06-16-2014, 04:50 PM
fidolido fidolido is offline
Registered User
Location: Los Angeles, CA
Join Date: Jan 2011
Posts: 20
Mein Auto: 93 525i E34
have you tried the stomp test for codes? Put the key in the ignition, turn but don't start, and hit the gas pedal 5 times quickly. The check engine light will blink out a code and repeat. Mark it down. It's usually a 4 digit code.
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Old 06-25-2014, 12:18 PM
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BMWFatherFigure BMWFatherFigure is offline
Old School
Location: Perth, Western Australia
Join Date: Aug 2012
Posts: 2,144
Mein Auto: E23;E30;E38;E32;E34 +
Blocked fuel filter; failing fuel pump; defective FPR.
Good - Fast - Cheap: Pick any two.
E23 735i; E32 735iL (X 2 - 1 Alpine White and 1 Glacier Blue); E34 535i; E38 735iL; R50 Cooper; R55 Cooper Clubman.
E21 318i; E30 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
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