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Sound like your fuel/air ratio is not correct.
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∙ 14y ago
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Why does my engine make a tapping noise at idle?
possibly low oil or low oil pressure, the tapping may be coming from the oil operated hydraulic lifters.
Why would your 1996 Geo Metro have a rough idle and tapping noise?
have the Fuel injectors checked out.
When does the engine have noise idle rough?
when stopped at red light or when in park
Why do your values tap when going on the highway?
What makes you think it's valve noise? How's your oil pressure? If you only have a light, does it flicker or just plain turn on when the engine is hot and idling? If it's an oil pressure gauge, is the oil pressure down near the bottom during idle? If you have poor oil pressure and the engine is making a tapping noise when you accelerate hard, it
Your idle is low and makes a hissing noise in the engine and at times shut of?
Vacuum hose leaking.
You hear a knocking noise that follows engine idle and acceleration what could it mean rocker arm?
bums
How would you know if the idle motor on a 96 grand Cherokee needed to be replaced?
First off, you need to know that the throttle body is clean. If the throttle body is not clean inside, the PCM (computer) will have difficulty controlling the idle motor. Next, you need to know that the battery hasn't been disconnected recently. If the battery has been disconnected and the engine hasn't been run for a half hour since reconnecting the battery, your computer will have difficulty controlling the idle motor. Now that you've got that part taken care of, lets go on. If you often have difficulty starting the engine but you can start it easily by lightly tapping the accelerator pedal while you turn the key, you probably have a bad idle motor. Do you have a stalling problem and the stalling only happens when you are stopped and the transmission is in gear, and especially if this only happens with a cold engine or only with a warm engine, consider if tapping the gas pedal prevents the stall? Does the engine seem to run very smoothly except for just before the stalling? If so, you probably have a bad idle motor. If your radiator is full and the heat works normally and you have no vacuum leaks but the engine idles very fast with a warm engine, try tapping the idle motor with a plastic screwdriver handle. If tapping the idle motor slows down the idle speed, you probably have a bad idle motor.
How often should you change the timing chain in 1996 Saturn SL1?
When you here a rattling noise from the engine at idle.
You just rebuild your v6 engine.... you noticed it making a ticking noise when at idle but can't hear it when driving may be highway noise. Engine sometimes lacks power but sometimes works fine.?
Have valves adjusted.
Engine light on and backfiring on a 1998 Toyota RAV4 what could this be?
1998 rav4 engine wont idle and clacking noise from under timing belt cover
Dodge 318 engine noise knock at idle?
Added info to question: Vacuum also coincidently went from steady 20psi to 15psi/knock - small backfire/miss on acceleration from idle. Knock is steady at idle.
Humming noise from rear in 2002 corvette Noise present when car in idle and moving does not incr with revving engine?
Have you checked your Exhaust Muffler and pipes ? Probably the fuel pump
