RPM Problem Nissan Pickup

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Truett - 26 Dec 2005 05:39 GMT

I have a 1987 Nissan D21 Pickup 3.0 v6 - 5 speed. The engine will not rev
up past 3000 RPM's without cutting out. It runs fine below 3000 RPM. I
have to shift to the next gear in order to drive and keep under 3000
RPM.This started after truck was in flood water up to the seats (had to
replace computer under seat).The water never reached the distributor.
Could the problem be the weights in the distributor not operating
correctly/frozen/rusted etc?When engine rpm's reach 2900-3000 the engine
cuts out like it has a governor. The engine doesn't die but just won't
rev. beyond that RPM. The exhaust (muffler/converter)had lots of water
thru tailpipe. Could O2 sensor cause this? I have not replaced it.Engine
has recently been completely rebuilt but problem existed before and after
rebuild. Prior to Flood water, there was no problem and truck ran
great.Any help is much appreciated.

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Mike Walsh - 26 Dec 2005 17:14 GMT

Does it have ignition points? Could be ignition points bouncing because of a weak spring. This used to be a problem with high revving V8s. You can get points with stronger springs from a speed shop.
Could also be a lack of fuel. Check for a clogged filter or bad fuel pump.
The O2 sensor should not cause anything like this.

> I have a 1987 Nissan D21 Pickup 3.0 v6 - 5 speed. The engine will not rev
> up past 3000 RPM's without cutting out. It runs fine below 3000 RPM. I
[quoted text clipped - 9 lines]
> rebuild. Prior to Flood water, there was no problem and truck ran
> great.Any help is much appreciated.

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Mike Walsh
West Palm Beach, Florida, U.S.A.

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