1990 Volvo 780 Q&A

1990 Volvo 780 Question: car has no power

after reparing warped head, test drive at70miles hr. backfired after slowing to return home. checked timming,cylinder pressure,replaced master flow sensor. car starts but no power!HEIP! -
Answer 1
Do you have a way to check fuel pressure? Does it have an EGR? Do you have a diagram with the relay layout? Zee -
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Engine stalling/stumbling problems can be caused by a failing mass airflow sensor.

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