1986 Volvo 740
Problem for Volvo 1986 740

1986 volvo 740gle runs rich black smoke and smell of gasoline




By cassady333 on Apr 10, 2009

" "
this car burns a lot of gas and smells like gasoline and also has black smoke coming out of the tail pipe. the o2 censor got changed and that didn't help. any ideas or suggestion?

Solution #1

posted on Aug 24, 2009
Not Rated)

Mustgo

Rank: Guru  Cars  Expert
Rating: 86%, 132 votes
Do a motor flush with SAEFOAM additive before the next oil change.
This will clean out the head and free up the rings.
Do a compression test and post the reading on the comment window.
Enigine with bad compression will not produce enough hoursepower and fail smog test.


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Solution #2

posted on Jun 24, 2009
Not Rated)

streetswe258

Rank: Wiz  Cars  Expert
Rating: 79%, 29 votes
YES ITS OLD AND THE HEAD GASKET TO
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