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MK3 / A70 markets
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Troubleshooting assistant

Pick a problem area, choose the symptom, then follow the remedy links or step-by-step TSRM procedure.

Diagnostic codes
Searching in 1990 USDM TSRM.
Areas /Muffler explosion / after fire — rich fuel mixture / misfire
Step-by-step TSRM procedure

Muffler explosion / after fire — rich fuel mixture / misfire

Follow the TSRM flowchart on FI-20.

FI-20
Current check

Check diagnosis system

Check for output of diagnostic code.
(See page FI-23)
Normal code

No diagnostic code

Continue with ignition timing check.
Malfunction code(s)

Diagnostic code present

Diagnostic code(s) (See page FI-26)