VW Polo 9N - rough running of the engine and possibly problems with the exhaust emissions test (AU)
| Data sheet | |
| Manufacturer | Volkswagen |
| Vehicle model | Polo 9N |
| Engine | BME |
| Year of manufacture | 2001 - 2009 |
| Symptoms | Rough engine running |
Engine runs rough / problems with the exhaust emission test (AU)
A defective plastic hose of the vent valve on the engine (Fig. 1) can be the cause of rough engine running in the above-mentioned vehicle. Sucking in "false air" can also cause problems with the exhaust emission test. In order to rectify the problem, the top covering the engine has to be removed. Then remove the two screws of the vent valve (which is attached to the top of the engine). Unclip the venting hose on the intake manifold. Replace valve and hose. Make sure that the hose is laid correctly.
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