Backfiring
Started by
Mini Tom
, Jun 07 2006 07:39 PM
13 replies to this topic
#1
Posted 07 June 2006 - 07:39 PM
I keep getting back firing every now and then. Bascially i double de-clutch all the time and some times when i tap the gas peddle whilst in neutral every now and then there will be a bang out of the exhaust. Is this fuel over running and then igniting on the hot exhaust? Is it a major problem? Is it causing any damage to my car?
Cheers
Tom
Cheers
Tom
#2
Posted 07 June 2006 - 10:26 PM
It isn't doing it any good. Possibly a timing issue. Do you have any other problems? High fuel consumption, running on, pinking etc etc.....
#3
Posted 08 June 2006 - 06:45 AM
I hate to say, that mines doing it all the time, but it's just down to needing the engine tuned... mixtures and timing set...
#4
Posted 08 June 2006 - 06:52 AM
baby bungle back fires a lot as well, :'( i put it down to the fuel we feed him
#5
Posted 08 June 2006 - 12:33 PM
often its cause by a leaky exhaust which is taking in air which is then combusting with unburnt fuel in the exhaust gasses. Its only usually exposed when the engines running rich, or on over-run. Check the exhaust by blocking it with the engine idling, your hand over the end should surfice, you should hear air escaping which indicates a leak.
#6
Posted 08 June 2006 - 12:49 PM
Dam wish mine would backfire
#7
Posted 08 June 2006 - 05:26 PM
umm my fuel consumption isnt that great. its 1275 and i get through a tenner a week in fuel and i spose i drive about 20 - 30 miles a week if that. i put shell fuel in it dunno whether this makes a difference or not. i don notice that with shell fuel my exhaust sounds far beefeier than BP or sainsburys etc. cheers for the help
#8
Posted 08 June 2006 - 06:27 PM
That would mean around 10-15 MPG and thats shocking, probably running really rich.
#9
Posted 08 June 2006 - 06:28 PM
deffo sounds like it is in dire need of a tuneup.
#10
Posted 08 June 2006 - 06:31 PM
yeah i suppose it wouldnt hurt to get it tuned. Does anyone know of how much this would cost roughly? Is it expensive because I'm only 18 and get paid rubbish amounts.
cheers
cheers
#11
Posted 08 June 2006 - 06:32 PM
prob around the £60 mark. see the rolling road thread in minichat
#12
Posted 08 June 2006 - 06:48 PM
wicked cheers mate
#13
Posted 19 September 2006 - 12:19 PM
dunno if you're still having the problem but my car was doing the same thing after an engine conversion. Went through all the usual causes, air leaks, timing and mixture even changed the carb.
We discovered it was a faulty ignition module on the electronic ignition now she runs sweet as.
hope this helps someone with similar problems.
We discovered it was a faulty ignition module on the electronic ignition now she runs sweet as.
hope this helps someone with similar problems.
#14
Posted 20 September 2006 - 06:06 PM
Burble is aparent when cat is removed and single straight through box fitted. Its fuel being fed back in after the revs reach the lower limit of over run fuel cut. Lots of oxygen in exhaust as on over run there is no fuel, the engine just becomes an air pump, Lambda sensor sees a lean mix, over compensates on fuel feed in and resulting in a sort of minor backfire(burble) in exhaust for short period.
Other causes are leaky exhausts or over fueling. Leaky exhaust are not good for emissions tests as more oxygen pressent, also if its before the cat and its still fitted, the cat will overheat. Over fueling is a sensor issue and noted by black sooty plugs.
Other causes are leaky exhausts or over fueling. Leaky exhaust are not good for emissions tests as more oxygen pressent, also if its before the cat and its still fitted, the cat will overheat. Over fueling is a sensor issue and noted by black sooty plugs.
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