Mechanics

ENGINE COUGHING NOISE

2006 Lexus IS

Noises problem
2006 Lexus IS 6 cyl Two Wheel Drive Automatic 27468 miles

I recently installed a new air intake and I have noticed that if I push past oh. 4500 RPM it coughs or pops. This problem goes away once the engine heats up. What is the cause of this?
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Spartan1326
January 15, 2009.



ITS WHAT YOU CALL A LEAN MISFIRE , WHEN YOU START MODIFYING FUEL AND AIR COMPONENTS YOU MAY HAVE FALSE READINGS OR ECU MAY SEE FALSE READINGS DUE TO THE MODIFICATION
CAUSING ALL YOUR OPEN LOOP LEAN CONDITION
CONSIDER WARMING UP YOUR ENGINE AND READING YOUR FUEL TRIMS LONG, SHORT AND TOTAL
WATCH YOUR CAT TEMP WHEN YOU HEAR THE POP
NOISE YOU MAY SEE A RISE IN TEMP
LIKE A SPIKE THIS IS A SIGN OF DAMAGE TO YOUR EXHAUST AND EMISSION SYSTEMS

Tiny
NYC.ECHO.LEXUS.TECH
Jan 20, 2009.
Would re-setting the ECU fix this? If not, what would fix it?

Tiny
Spartan1326
Jan 20, 2009.
TUNING WOULD REQUIRE AFTERMARKET COMPONENTS AND ALL WARRANTIES WILL BE VOID.
I RECOMMEND PERFORMANCE SHOP OR LOOK ONLINE
FOR UPGRADES FOR YOUR INDUCTION, FEUL AND EXHAUST SYSTEM

Tiny
NYC.ECHO.LEXUS.TECH
Jan 21, 2009.