Rover 416 / yr. 1994

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Wed 10 Apr 2002 14:50
Rover 416 / yr. 1994 - chris webster


Any ideas what might be causing this problem with 1600 Honda engine in my recently acquired Rover.
At norm. temp , on tickover - It shows a momentary slight dip in R.P.M ocurring aprox every 5/6 secs and have also notice a simultaneous 'popping' at the tailpipe. It never actually cuts out.
There appears to be no problems at all when under acceleration and the car is generally performing well. Programmed fuel injection is fitted with,(so I am told) little scope for adjustment.
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Wed 10 Apr 2002 16:36
Re: Rover 416 / yr. 1994 - Alwyn
Chris,

If this is the same as what we used to call "hunting", it may be a sign of a rich mixture.

Funnily enough, my lawn mower was doing this last week after it's winter break. The engine speed was rising and falling. I then remembered my motor bike days. "Ah, it's hunting" I thought.

I weakened the mixture, the engine speeded up and then ran OK.

Check a spark plug for sooty deposits.
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Wed 10 Apr 2002 19:02
Re: Rover 416 / yr. 1994 - Andrew Moorey (Tune-Up Ltd.)
Tired or dirty O2 sensor will cause this problem by not reacting/correcting fuelling quickly enough. Result is that momentarily the mixture goes too weak causing misfire. Try a tankful of Texaco or a dose of Forte Gas. Treatment
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