HISSIN50 said:Based upon what you said about it occuring during the shift, it sounds like a rich backfire. When you let off the gas for a shift [after being at high RPM/high load], the motor goes rich for a split second as you get off the gas real quick for the shift.
The EFI actually normally does a great job of dealing with this, but a glitch in tune or mods can allow it to happen (and it's more pronounced with an O/R pipe).
Good luck.
Umm.. why would the manifold be hurt?Shakerhood said:I agree with you that the modern EFIs do a great job in correcting. I still have a hard time thinking the Intake Manifold survived a 5 Grand plus Backfire! Last time I changed my air filter I cleaned out my airbox good with some Isopropyl Alcohol and I got a quick Afterfire as soon as I started the car.
poneypower89 said:Umm.. why would the manifold be hurt?
If the car is running too rich then fuel is dropping through the exhaust valve and landing on the heated up headers... in turn the fuel is ignited in the headers and a fire shoots through the exhaust system.. backfireing ...
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