cant figure this one out?
Thread Starter
Instructor
Joined: Nov 2008
Posts: 170
Likes: 0
From: Odessa Tx
cant figure this one out?
I have done research on past threads but cant find an answer to my question. Why does my car have a poping sound like a backfire coming from inside the engine compartment. It sounds like it comes from the air cleaner part.??? It also has a backfire from the exhaust sometimes.
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
My best guesses:
Spark plugs not firing correctly.
Injector flow problems.
Timing may be off.
Valves are not sealing:
Valve/s adjustments are too snug.
Valve/s, spring/s or seat/s are damaged.
Spark plugs not firing correctly.
Injector flow problems.
Timing may be off.
Valves are not sealing:
Valve/s adjustments are too snug.
Valve/s, spring/s or seat/s are damaged.
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
What have you done to try to diagnose the problem? Start by checking for codes, verify correct fuel pressure, are the ignition wires any good, (open the hood at night to check for arcing), is it due for normal maintenance such as spark plugs, have any repairs been done recently?
Diagnosis starts by testing and eliminating possibilities until you narrow down the root cause, good luck.
Diagnosis starts by testing and eliminating possibilities until you narrow down the root cause, good luck.
Pro
Joined: Mar 2008
Posts: 579
Likes: 2
From: High Bridge New Jersey
The first thing
I have done research on past threads but cant find an answer to my question. Why does my car have a poping sound like a backfire coming from inside the engine compartment. It sounds like it comes from the air cleaner part.??? It also has a backfire from the exhaust sometimes.
Melting Slicks
Joined: May 2007
Posts: 2,171
Likes: 1
From: Warwick RI
I have done research on past threads but cant find an answer to my question. Why does my car have a poping sound like a backfire coming from inside the engine compartment. It sounds like it comes from the air cleaner part.??? It also has a backfire from the exhaust sometimes.
Set timing
check firing order and for cross firing with the wires
Post results and we go from there
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