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2 big back fires ???
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2 big back fires ???
Hi can some let me know your thoughts I dont really get into my car very often just like to no the power is there if needed. But today i gave a couple of gutfuls of punch and got 2 big back fires would this be normal or not gave it 2 punches off the start would this be ok i no the evos run rich????? Gary
Evolution X MR 712 GTP Turbo Upgrade. Pedders Sports Extrema Coil Overs, DBA 5000 Premium 2 piece Brake Rotors Front and Rear Rotors ,OME Black- Out Rear Taillights (Ralliart) Red Floor Illumination. White Line Centre Roll Adjust Kit.
Ecutek Custom Tune. 3in TurboXS. Turbo Back Exhaust.
Ecutek Custom Tune. 3in TurboXS. Turbo Back Exhaust.
Mine back fires like crazy as well. I heard it's ok as long as it's not backfiring while you are accelerating. It's ok if you are decelerating. Mine back fires when I'm decelerating and I have read that it is due to being too rich and not all the petrol is being ignited and it ignites in the exhaust instead from the heat causing backfire in the exhaust. If it's while you are accelerating then it may be that you are running a bit lean and ignites before it is meant to. Not sure about the detail but if it does better get it checked out before you get an engine fail. Hope someone else can shed more light on this in case I'm wrong.
my last 2 cars had the ecutek tunes ,and ecutek was on this car when i brought i generally just cruise around and dont give the car a hard time but as i said decide to have a little fun both back fires were off the start dont recall it doing before??/ ?? Gary
Evolution X MR 712 GTP Turbo Upgrade. Pedders Sports Extrema Coil Overs, DBA 5000 Premium 2 piece Brake Rotors Front and Rear Rotors ,OME Black- Out Rear Taillights (Ralliart) Red Floor Illumination. White Line Centre Roll Adjust Kit.
Ecutek Custom Tune. 3in TurboXS. Turbo Back Exhaust.
Ecutek Custom Tune. 3in TurboXS. Turbo Back Exhaust.
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aussie027
- Lancer Ralliart
- Posts: 554
- Joined: Tue Nov 04, 2008 4:02 am
- Location: Perth, WA, Australia
Guys,
Sorry but I don't think you should be getting any back firing at all under any circumstances in a modern computer controlled engine.
If it is running way too rich for any given set of engine load and operating parameters then you are just wasting fuel and it should probably be re tuned.
Even the stock factory tunes on a stock engine will be overly conservative and set too rich just so Mitsu can well and truly cover their A** for liability purposes.
Obviously the Mitsu Engineers or the tuner who maps the engine parameters has to maintain adequate margins to prevent pre ignition and detonation etc under any extreme conditions but that programming can be very precisely done and need not be set waaaay too rich.
A call to service dept and a chat with a knowledgeable mechanic or a call to Mitsu customer technical service may be in order.
Just because several people may be having the same symptoms doesn't necessarily make it right or normal!!
Sorry but I don't think you should be getting any back firing at all under any circumstances in a modern computer controlled engine.
If it is running way too rich for any given set of engine load and operating parameters then you are just wasting fuel and it should probably be re tuned.
Even the stock factory tunes on a stock engine will be overly conservative and set too rich just so Mitsu can well and truly cover their A** for liability purposes.
Obviously the Mitsu Engineers or the tuner who maps the engine parameters has to maintain adequate margins to prevent pre ignition and detonation etc under any extreme conditions but that programming can be very precisely done and need not be set waaaay too rich.
A call to service dept and a chat with a knowledgeable mechanic or a call to Mitsu customer technical service may be in order.
Just because several people may be having the same symptoms doesn't necessarily make it right or normal!!
I FIND YOUR LACK OF FAITH DISTURBING......
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aussie027
- Lancer Ralliart
- Posts: 554
- Joined: Tue Nov 04, 2008 4:02 am
- Location: Perth, WA, Australia
That still doesn't sound right Gary.
Guys, A net search " backfiring in turbo cars, yielded this but have a read as there are a number of comments on diff car forums. I would still be talking to a Mitsu Technical people and a very knowledgeable mechanic/ tuner.
I had a stock Mitsu Cordia Turbo in the 80s and a Mitsu Eclipse GST Turbo in US in 90s and 00s and NEVER had any kind of backfire etc -
Turbo charged race cars do it deliberatly. The The burning fuel traveling through the exhaust helps to keep the turbo spinning when off the throttle which of course reduces turbo lag. I think they have moved beyond it now, but for a while most WRC cars actualy had a fuel injected plumbed into the exhaust that was used to create a controlled fire in the exhaust when ever the throttle was closed.
When normal cars decelerate, they let off the throttle which causes the air to be shut off. But while the motor is slowing down, fuel is still being injected into the engine. The unburnt fuel burns in the headers because they're so hot. One of the reasons why newer cars do not backfire, is because most fuel injected cars shut down the fuel injectors after so many seconds of decelerating. This prevents raw fuel from entering the exhaust. Unburnt fuel will destroy a catalytic converter.
Guys, A net search " backfiring in turbo cars, yielded this but have a read as there are a number of comments on diff car forums. I would still be talking to a Mitsu Technical people and a very knowledgeable mechanic/ tuner.
I had a stock Mitsu Cordia Turbo in the 80s and a Mitsu Eclipse GST Turbo in US in 90s and 00s and NEVER had any kind of backfire etc -
Turbo charged race cars do it deliberatly. The The burning fuel traveling through the exhaust helps to keep the turbo spinning when off the throttle which of course reduces turbo lag. I think they have moved beyond it now, but for a while most WRC cars actualy had a fuel injected plumbed into the exhaust that was used to create a controlled fire in the exhaust when ever the throttle was closed.
When normal cars decelerate, they let off the throttle which causes the air to be shut off. But while the motor is slowing down, fuel is still being injected into the engine. The unburnt fuel burns in the headers because they're so hot. One of the reasons why newer cars do not backfire, is because most fuel injected cars shut down the fuel injectors after so many seconds of decelerating. This prevents raw fuel from entering the exhaust. Unburnt fuel will destroy a catalytic converter.
Last edited by aussie027 on Sat Dec 21, 2013 4:52 pm, edited 1 time in total.
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scott_drake
- Lancer VRX/GTS
- Posts: 453
- Joined: Thu Sep 30, 2010 1:46 pm
- Location: world wide
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