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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 09-07-2007, 08:36 AM   #1 (permalink)
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Constantly varying performance

Good day.

I recently baught a 1996 318is Auto for my wife, but is experiencing the following problem when either eccelarating or just normal driving.

The engin performs in a constantly varying manner in cycles of between 5 and 9 seconds. It either pulls great or performs lik a 1400 cc engine. The fuel consumption needle constantly drifts back an forth, corrresponding to these good and and poor engine performances. This does not happen when I fully step on the excellerator, say when driving on the highway, or when idling.

I did replace the rubber duct between te MAF and throttle body, thinking that this minght be leaking air in, but no change in the situation.

Please help
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Old 09-10-2007, 06:15 AM   #2 (permalink)
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Come on guys, is this one to difficult for all you experts out there )
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Old 09-10-2007, 09:19 AM   #3 (permalink)
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well start with the basics-

fuel filter
air filter
oil filter/change
spark plugs/wires/cap and rotor
pull some codes and see if anything comes up.
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