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Author Topic: backfiring  (Read 10130 times)

Offline VileZambonie

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Re: backfiring
« Reply #15 on: September 02, 2007, 06:53:53 pm »
uh huh
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline gold84gmc

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Re: backfiring
« Reply #16 on: September 03, 2007, 11:49:17 am »
ok, so i pushed down on just the plunger piece not the rocker arm thing, and the engine did not stall. the rpms went down but that was it.....so does that mean the carb needs to be rebuilt?
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92 buick century custom 3.3L

Offline VileZambonie

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Re: backfiring
« Reply #17 on: September 03, 2007, 07:13:27 pm »
If your RPMs went up I'd be looking for a serious vacuum leak.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline gold84gmc

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Re: backfiring
« Reply #18 on: September 03, 2007, 07:38:27 pm »
no they went down
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92 buick century custom 3.3L

Offline VileZambonie

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Re: backfiring
« Reply #19 on: September 03, 2007, 07:56:22 pm »
I would say that your accelerator pump is probbaly no good. Rebuild the carb
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline gold84gmc

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Re: backfiring
« Reply #20 on: September 03, 2007, 08:16:28 pm »
http://www.4wheelnoffroad.com/qjet.html  ....so does that website seem thorough enough to follow for the rebuild?
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92 buick century custom 3.3L

Offline VileZambonie

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Re: backfiring
« Reply #21 on: September 03, 2007, 08:40:29 pm »
Sure just get some epxoy and seal up the fuel wells underneath as the factory plugs tend to leak and drain the fuel bowl into the intake manifold reulting in hard start - long cranking
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10
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