5.4 triton constant popping in exhaust
5.4 triton constant popping in exhaust
(OP)
when i start the SUV the popping in prominent as it warms up it quietens slightly , fuel mileage has went to the (CRAPPER).. dealership service cant narrow it down scoped says (bank 1 sensor 2 lean).. all O2 sensors are new , new coils and plugs , octane makes no difference .. anyone have any idea to how i can fix this problem it would be greatly appreciated ..... ( PLEASE )
Tiny108
Tiny108





RE: 5.4 triton constant popping in exhaust
Open the hood and listen for a hiss at idle.
Mike Halloran
Pembroke Pines, FL, USA
RE: 5.4 triton constant popping in exhaust
RE: 5.4 triton constant popping in exhaust
How is the compression? I know that if the dealership scoped the vehicle, they should have picked up a compression problem while monitoring the cranking amps. Perhaps one of the folks that is more up to speed than me might be able to correct my memory if the following statement is wrong. Measuring cranking amperage to determine the relative cranking compression can sometimes miss a head gasket failure between cylinders.
I would start with a compression check with all the plugs out and/or a leak down check. It sounds like someone has been replacing parts like mad trying to correct the problem and I assume that there is no way to mix up the coil wiring on your engine.
Next I would ensure that the valve train is in good shape: (1) no rounded lobes on the cam (2) no broken or weak valve springs (3) no lifters that are not bleeding down properly.
Tiny, are you positive your engine is in good mechanical condition? If the engine is mechanically sound, then start looking for some condition that would allow unburned fuel into the exhaust
RE: 5.4 triton constant popping in exhaust
RE: 5.4 triton constant popping in exhaust
??? What kind of a warranty is that? Goes against Federal law, if I'm not mistaken.
RE: 5.4 triton constant popping in exhaust
RE: 5.4 triton constant popping in exhaust
RE: 5.4 triton constant popping in exhaust
I always thought they are trained to train your car to return regularly, kind of like a homing pigeon.
If I buy a new car, from the day I take delivery, it never goes to a dealership again unless it is for replacement of parts under warranty. I take it where I can do my own service and get it signed off by a licensed mechanic.
Regards
Pat
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RE: 5.4 triton constant popping in exhaust
RE: 5.4 triton constant popping in exhaust
RE: 5.4 triton constant popping in exhaust
The foot that is.
Only other time I ever managed a breakage by dropping a cylinder head was when I had ported the head until it was quite thin, like 2mm thick or less. It only cracked the local thin area after a direct impact on that area.
Regards
Pat
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RE: 5.4 triton constant popping in exhaust