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do efi 4age backfire?
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03-17-2013, 04:45 AM
Post: #12
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Re: Back firing
Dave W Wrote:The throttle body has a vacuum pot that limits how quickly the throttle can return to the closed position. If it is defective or removed then the throttle plate closes tightly which causes a very high vacuum in the intake manifold, this draws all the fuel off the port walls of the intake. The raw fuel is then pump thru the cylinder into the exhaust manifold on the over run where there is sufficient oxygen in the exhaust system allowing the fuel burn i.e. back fire. Well explained  Mine does the same when i release my foot off the gas pedal or when changing gears on high and low revs....and its a stock S3 4age... I always thought its back pressure from the exhaust 
Current - 2006 Run X RSI TRD spec Current - 1991 AE92 Conquest 4AGTE Ex - 1992 AE92 Corolla 4AGTE(175KW&295NM) Ex - 1983 1.8 SE Liftback(headworks and side draughts) |
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| Messages In This Thread |
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do efi 4age backfire? - kpretro84 - 03-16-2013, 11:37 AM
[] - totta Crolla - 03-16-2013, 01:44 PM
[] - totta Crolla - 03-16-2013, 06:23 PM
Flames as well ?? - jondee86 - 03-16-2013, 10:43 PM
Back firing - Dave W - 03-17-2013, 03:12 AM
Re: Back firing - ash16valve - 03-17-2013 04:45 AM
Re: Back firing - kpretro84 - 03-17-2013, 06:25 AM
Re: Back firing - jondee86 - 03-17-2013, 09:11 PM
Re: Back firing - ash16valve - 03-17-2013, 10:38 PM
Re: Back firing - kpretro84 - 03-20-2013, 07:36 AM
[] - totta Crolla - 03-20-2013, 09:51 AM
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