T O P I C R E V I E W
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AL STOCK
Member # 1852
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posted
So everytime i punch it hard the car backfires and loses power around 4000rpms then regains power around 4800rpms... When i say loses power, it feels like the car wants to move but the backfire is holding it back..Backfires about 2-3 times then starts gaining power...This happens when car is warmed up but hardly happens in cold conditions..
What can this be? Spark Plugs? Air Filter? Exhuast?
Thanks David
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2stangs69-91
Member # 1951
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posted
my guess would be wires,also plugs.
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FasterDamnit
Member # 442
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posted
WHen your motor is cold you are running in open loop- not looking at O2 sensors. Once warmed up you go into closed loop. WOT also goes into open loop, but I believe the fuel tables are different between cold operation and normal operating temp. Sure your fuel pressure is right?
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Black94 5.0
Member # 655
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posted
If its an exhaust backfire, check for an exhaust leak or a faulty air injection diverter valve...
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AL STOCK
Member # 1852
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posted
Damm i hate exhuast leaks! Im gonna get underneath and retighten every exhuast bolt..
Also gonna throw in new spark plugs since my wires are still new.. My plugs were last changed about 8K miles ago -
Yeah my fuel pressure is right. Still stock lol
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