Question about 1998 BMW Z3 Roadster

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Bmw z3 roadster 1998, recent purchase, very lumpy when idling, otherwise drives very well, have changed the cam sensor and checked timing chain, been told this is a common fault with this model can you offer any advice

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  • BMW Master
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Try the engine breather pipes first ,if that doesnt work clean the idle control valve

Posted on Aug 21, 2010

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Posted on Jan 02, 2017

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1998 bmw z3 roadster 2.8 engine light came DTC code p0170


There is no one fix works on this O2 sensor code
P0170 - Fuel Trim Malfunction Bank 1
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HELLO, I HAVE TROUBLE CODES PO330,PO340, ON MY OBD2 READER WITH THE MAINT LIGHT ON IN 96 BMW Z3 ROADSTER 4CYL., PO330 IS KNOCK SENOR, PO340 IS CAMSHAFT POSITION SENOR, I WANT TO KNOW HOW TO FIX THEM BOTH....


The Cam Position Sensor is a common item to fail. However, the cam positioning mechanism can fail too giving that code.

There are two sensors and the Exhaust Cam Sensor is most common to fail. I always replace both.
Te CKP's are on the top front of the engine next to the cylindrical operation solenoids.

Knock sensors fail too and need checked or correct feedback to ECU with a scanner.
Find a shop near you at http://www.iatn.net/shopfinder/

These engines require regular oil changes with quality synthetic oils and OE filter....not a FRAM or WIX !

Buy only BMW sensors ...aftermarket have high failure rate.

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1 Answer

BMW z3 1998 1.9 liter engine cylinder head replacement


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Oct 19, 2010 | 1998 BMW Z3 Roadster

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Jan 20, 2010 | 1998 BMW Z3 Roadster

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Aug 01, 2009 | 1998 BMW Z3 Roadster

1 Answer

1998 BMW Z3 2.8 Idles rough when cold starting in wet weather


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Jul 04, 2009 | 1998 BMW Z3 Roadster

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That RPM sounds a little low, did BMW comment?

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