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| G16a backfiring on deceleration https://auszookers.com/forum/viewtopic.php?f=5&t=8640 |
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| Author: | zookster666 [ Mon Dec 14, 2009 11:26 pm ] |
| Post subject: | G16a backfiring on deceleration |
My g16a in my Sierra is backfiring on deceleration it runs a Sierra head and carby what causes this carby or timing Cheers |
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| Author: | eldo [ Mon Dec 14, 2009 11:32 pm ] |
| Post subject: | Re: G16a backfiring on deceleration |
an air leak |
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| Author: | zookster666 [ Mon Dec 14, 2009 11:49 pm ] |
| Post subject: | Re: G16a backfiring on deceleration |
The thing is it doesn't have the characteristics of a vacuum leak it idles fine etc will look into it though |
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| Author: | eldo [ Mon Dec 14, 2009 11:57 pm ] |
| Post subject: | Re: G16a backfiring on deceleration |
is it running lean so its popping on decel ? im no mechanic |
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| Author: | zookster666 [ Tue Dec 15, 2009 12:03 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
Smells like it's running rich Im no mechanic either my 1.3 did it aswell but not as bad |
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| Author: | eldo [ Tue Dec 15, 2009 12:12 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
time to pm stekky, hey stekky get over here |
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| Author: | zookster666 [ Tue Dec 15, 2009 12:18 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
He'll be here sonner or later |
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| Author: | eldo [ Tue Dec 15, 2009 12:20 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
spamekky |
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| Author: | BenT [ Tue Dec 15, 2009 1:44 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
zookster666 wrote: My g16a in my Sierra is backfiring on deceleration it runs a Sierra head and carby what causes this carby or timing
Cheers Exhaust leaks can cause backfires on decelleration. Stick your foot over the end of the exh and listen for a hiss from a leak. Ben |
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| Author: | zookster666 [ Tue Dec 15, 2009 1:46 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
There are no exhaust leaks it might just need a good tune I'm picking up a 1.6 carb on the weekend see how that goes |
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| Author: | steak_knife [ Tue Dec 15, 2009 1:48 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
eldo wrote: spamekky
Yes sweet pea?? 
How bad is it? What size exhaust do you have & how did you set the timing( if you did) I found out the hard way that a car with a sport's exhaust will back fire on decell, most time's there is bugger all you can do about it, you said the 1.3 did it to. eldo is partly right in saying look for vacc leak's, I'd also make sure the carby isn't over fueling, sucking or dribbling at idle. I'm going to have to start charging you fuel money. 
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| Author: | oozuk [ Tue Dec 15, 2009 2:39 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
burnt exhaust valves cause popping and backfiring, also exhaust leaks sucking in air in deceleration |
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| Author: | zookster666 [ Tue Dec 15, 2009 2:53 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
Ok I'll have a look at it the 1.3 was no where near as bad it doesn't worry me just thought it may be an easy fix it gas a 2 inch exhaust and extractors |
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| Author: | royce [ Tue Dec 15, 2009 3:05 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
exhaust leak retarded timing rich all of the above 
some engines jsut put though, for no real reason |
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| Author: | zookster666 [ Tue Dec 15, 2009 3:37 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
I'll give it a tube do the timing put new carby on etc and see how that goes thanks for the help fellas learn something new everyday on here |
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| Author: | hutch [ Tue Dec 15, 2009 4:53 am ] |
| Post subject: | Re: G16a backfiring on deceleration |
royce wrote: retarded timing
my moneys on that, but could be carby? How is it on acceleraton? |
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| Author: | zookster666 [ Tue Dec 15, 2009 2:50 pm ] |
| Post subject: | Re: G16a backfiring on deceleration |
It's pretty sluggish on acceleration I'll have to get a timing light fm do that |
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| Author: | JrZook [ Tue Dec 15, 2009 3:44 pm ] |
| Post subject: | Re: G16a backfiring on deceleration |
A rich condition usually doesn't promote backfiring unless the timing is wayyy off. Since you have the 1.3 carb on the 1.6, find the idle mixture screw and set this to run the best at about 1k rpm. This is where the transition ports are just opening and where most of the problems occur. Dan |
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