drehzal schwankt

[hwegsch]

Hallo zusammen,
hier ein Auszug aus dem Reparaturbuch von Haynes, Kapitel "Troubleshooting":　

8 Engine 'topes' while idling or idles erratically
1 Vacuum leaks. Check mounting bolts at the intake manifold or plenum for tightness.

Make sure that all vacuum hoses are connected and in good condition. Use a stetho-scope or a length of fuel hose held against your ear to listen for vacuum leaks while the engine is running. A hissing sound will be heard. A soapy water Solution will also detect leaks. Check the intake manifold or plenum gasket surfaces.

2 Leaking EGR valve or plugged PCV valve (Chapter 6).

3 Clogged air filter (Chapter 1).

4 Leaking head gasket. Perform a cyiinder compression check (Chapter 2).

5 Worn timing chain (Chapter 2).
6 Worn camshaft lobes (Chapter 2).

7 Valves burned or otherwise leaking (Chapter 2).

8 Ignition system not operating properly (Chapter 5).

9 Clogged or dirty injectors (Chapter 4).

10 Faulty emissions or engine control Systems (Chapter 6).

9 Engine misses at idle speed

1 Spark plugs faulty or not gapped properly (Chapter 1).
2 Faulty spark plug wires (Chapter 1).

3 Ignition components damaged or wet (Chapter 1).

4 Short circuits in spark plug wires, ignition or coils (Chapter 5).

5 Emissions or engine control Systems faulty (Chapter 6).

6 Clogged fuel filter and/or foreign matter in fuel. Replace the fuel filter (Chapter 1).

7 Vacuum leaks at intake manifold or Plenum or hose connections. Check as described in Section 8.

8 Cyiinder compression low or uneven. Check as described in Chapter 2.

9 Fuel injectors clogged or dirty (Chapter 4).

10 Leaky EGR valve (Chapter 6).

11 Emissions or engine control Systems faulty (Chapter 6).

10 Excessively high idle speed

1 Sticking throttle linkage (Chapter 4).

2 Idle Air Control system problem (Chapter 6).

3 Faulty emissions or engine control Systems (Chapter 6).


viel Erfolg,
Helmut