3VZE Ticking At Constant Throttle
10-30-2008, 01:12 PM
#1
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3VZE Ticking At Constant Throttle
hey all,
94 3VZE 4Runner
When the engine's warmed up, at around 2,000-2,500 rpm, there is a ticking noise that comes from the driver's side of the engine. It only happens when I have the gas pedal partially pushed down, trying to maintain speed. If I let off the pedal, it stops; if I push harder and the RPM's go up, it stops. Its a pretty loud tick, and is definitely audible in the cab as well as outside the cab.
Maybe valve tapping, exhaust reed, gremlins?
What do you all think?
Thanks,
Steve
94 3VZE 4Runner
When the engine's warmed up, at around 2,000-2,500 rpm, there is a ticking noise that comes from the driver's side of the engine. It only happens when I have the gas pedal partially pushed down, trying to maintain speed. If I let off the pedal, it stops; if I push harder and the RPM's go up, it stops. Its a pretty loud tick, and is definitely audible in the cab as well as outside the cab.
Maybe valve tapping, exhaust reed, gremlins?
What do you all think?
Thanks,
Steve
10-30-2008, 03:13 PM
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Most likely it is valve tap, the lifter are solid. My 92 does the same thing, I need to adjust the valve lash. After I adjusted the valves on my old 89 it was very quiet, except for evenly ticking fuel injectors (much quieter than the ticking valves before the adjustment).
hey all,
94 3VZE 4Runner
When the engine's warmed up, at around 2,000-2,500 rpm, there is a ticking noise that comes from the driver's side of the engine. It only happens when I have the gas pedal partially pushed down, trying to maintain speed. If I let off the pedal, it stops; if I push harder and the RPM's go up, it stops. Its a pretty loud tick, and is definitely audible in the cab as well as outside the cab.
Maybe valve tapping, exhaust reed, gremlins?
What do you all think?
Thanks,
Steve
94 3VZE 4Runner
When the engine's warmed up, at around 2,000-2,500 rpm, there is a ticking noise that comes from the driver's side of the engine. It only happens when I have the gas pedal partially pushed down, trying to maintain speed. If I let off the pedal, it stops; if I push harder and the RPM's go up, it stops. Its a pretty loud tick, and is definitely audible in the cab as well as outside the cab.
Maybe valve tapping, exhaust reed, gremlins?
What do you all think?
Thanks,
Steve
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10-31-2008, 08:02 AM
#9
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My friend had the same problem....he eventually found a small exhaust leak near the manifold, or at it, i can't remember. But, after he fixed that, the ticking sound was reduced significantly.
I know that isn't fixing the real problem...or at least that is what my common sense tells me. But these 3.0's all have a slight tick, or at least it's real common.
Just something else to look at.
I know that isn't fixing the real problem...or at least that is what my common sense tells me. But these 3.0's all have a slight tick, or at least it's real common.
Just something else to look at.
10-31-2008, 08:40 AM
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i have about the same noise wile i am driving but it only does it only when the clutch is in gear, but if i just push the clutch pedal in and rev to the same place it does not do it any more
10-31-2008, 09:10 AM
#11
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my truck has something very similar. It haopens in the same range and its on the drivers side. If i pull the #2 plug wire off while running it goes away completly. Try that on the drivers side and see if it helps. I thought it was rod knock but it was very sporadic and has slowly progressed over the last 1500 miles. A rod would have gone by now I thought. I havent tried to adjust the valves yet though. My other thought was piston slap (possible broke a small piece of the skirt off or wrist pin walk (not sure if these are press or c-clip least likely answer but havent researched it yet.) Let me know what you come up after you pull the wires 1 at a time. I would like to find the problem so i can fix it.
10-31-2008, 10:11 AM
#14
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i know injector tick and like the OP it says its at a constant throttle...Just keeping the truck at a constant speed...and I can make mine do it in neutral and have tried scoping the engine and it sounds like it echos through out the entire engine so i have not been able to diagnose it that way.
10-31-2008, 11:53 AM
#17
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In your case, do a valve adjustment first.
To the OP, if you can ge someone to hold on the gas when it's ticking, try using a long screwdriver, or stethescope to localize the noise.
11-03-2008, 09:29 AM
#20
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Quick update...since I have a 35k mile motor sitting in my garage I have been driving the snot out of my rig pulling 6k RPM every chance I get (gas mileage sucks) But I figured for science I would do this. I swear the noise is getting quiter and less freq. I am starting to wonder if maybe a lifter was clogged and not able to pressurize with oil. What do you think? So I am gonna run an engine flush through the motor and see what happens. I am still having issues believing its a fuel injector. When I scoped the motor it echoed throughout the motor.
