1996 Accord Lx V6 Engine RPM surging ?

After driving in highway for 15 minutes or longer, the engine speed
meter starts moving back and force, i can feel the engine RPM surging,
the vehicle got some "pulsing" effect, after a while , "pulsing"
symptom disappear, but feels like the acceleration become slugish,
since engine speed meter still moving back and force, (well, most of
the time , stays at 0), i don't know what RPM the engine is at.
It seems like i have to shutdown the engine, let it completely cool
down, before the engine meter come back to normal again. And in hot
weather, this problem happen pretty quick after i get on the road. A
while ago when the weather is cool, it didn't happen on my way to
work(30 miles high way).
Can anybody give me some hints on this?
Thank you!
ls


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ls00722
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ls00722 wrote:
> After driving in highway for 15 minutes or longer, the engine speed
> meter starts moving back and force, i can feel the engine RPM surging,
> the vehicle got some "pulsing" effect, after a while , "pulsing"
> symptom disappear, but feels like the acceleration become slugish,
> since engine speed meter still moving back and force, (well, most of
> the time , stays at 0), i don't know what RPM the engine is at.
> It seems like i have to shutdown the engine, let it completely cool
> down, before the engine meter come back to normal again. And in hot
> weather, this problem happen pretty quick after i get on the road. A
> while ago when the weather is cool, it didn't happen on my way to
> work(30 miles high way).
> Can anybody give me some hints on this?
> Thank you!
> ls
>
>
what's your coolant level? look inside the radiator when cool, do NOT
rely on the level of fluid in the expansion bottle.