Question about 1995 GMC Safari

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1995 GMC Saffari

I Have 95 Saffari Van 4.3 Engine It Misses On 2 Cylinders On Passenger Side The Back Cylinder And Middle Cylinder Black Smoke Comes Out Of The Exaust Tries To Hit When Race Engine Up And Hold It At High Speed When Let Idle It Loads Back Up With Raw Gas And Black Smoke And Tries To Die Out Any Suggestion ?

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Have you done a tune up recently? In that case you met have swapped spark plug wires.

Posted on Oct 02, 2011

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The only problem is, the 4.3L engine has NO timing belt. That engine is a 5.7L with the back 2 cylinders cut off. The two engines share the same timing CHAIN, water pump, etc...I'd be more apt to have a data stream done with a scanner and watch the O2 sensors. They may not be working properly. Check to see what your fuel pressure is as well. If your fuel pressure regulator isn't working properly, this very same thing can happen.

Posted on Jul 01, 2008

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Sounds like you may have jumped a tooth or 2 timing belt may need to be changed this is the symptoms on the safari van black smoke unburnt fuel take out spark plugs and inspect them should tell you the story weather the plug is fireing or weather the timing is way off causing excess exaust gas from charing plugs good luck with problem

Posted on Jul 01, 2008

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| 2 |---------| 1 |
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