4.5 Running rough?

Engines and Engine Systems
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David M
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Re: 4.5 Running rough?

Post by David M »

That will work. You now need to check the timing and the air/fuel ratio and you should have a different vehicle.
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Re: 4.5 Running rough?

Post by SJC »

Must say, it already feels a lot better than what it use to. It was " stuttering" a bit before I blocked it off... :salute:
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Re: 4.5 Running rough?

Post by David M »

SJC wrote: 07 Dec 2017 08:15 Must say, it already feels a lot better than what it use to. It was " stuttering" a bit before I blocked it off... :salute:
Once you sort the settings you will find you gain a lot of power and smoothness at the bottom end of the rev range but it will no longer take off at 3 400 rpm as it is not getting the extra air through those holes.
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Re: 4.5 Running rough?

Post by David M »

There is good news and bad news.

Most of our 4.5's have a problem with pinging and we can mess around with different octanes of fuel, intakes, heat reduction etc etc.

The good news is that the problem is the worn distributor and replacing it turns your vehicle into a machine with no pinging whatsoever, anywhere under any load.

The bad news is that the replacement from Nissan is R 15 k. Importing from Aus is more expensive and Partsouq in the UAE does supply but has no stock which you should land here for about R 7 k.
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Re: 4.5 Running rough?

Post by Wilkie »

David M wrote: 01 Feb 2018 14:51 There is good news and bad news.

Most of our 4.5's have a problem with pinging and we can mess around with different octanes of fuel, intakes, heat reduction etc etc.

The good news is that the problem is the worn distributor and replacing it turns your vehicle into a machine with no pinging whatsoever, anywhere under any load.

The bad news is that the replacement from Nissan is R 15 k. Importing from Aus is more expensive and Partsouq in the UAE does supply but has no stock which you should land here for about R 7 k.
have you got a Nissan part no for that.....
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Re: 4.5 Running rough?

Post by Kagiso II »

what about MARINUS ?? he should have a more affordable one?
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David M
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Re: 4.5 Running rough?

Post by David M »

Kagiso II wrote: 01 Feb 2018 15:23 what about MARINUS ?? he should have a more affordable one?
Nope. Checked. The Ausiies also bitch and moan as they pay about Aussie dollar 1 000 for them.
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Re: 4.5 Running rough?

Post by David M »

Wilkie wrote: 01 Feb 2018 15:18
David M wrote: 01 Feb 2018 14:51 There is good news and bad news.

Most of our 4.5's have a problem with pinging and we can mess around with different octanes of fuel, intakes, heat reduction etc etc.

The good news is that the problem is the worn distributor and replacing it turns your vehicle into a machine with no pinging whatsoever, anywhere under any load.

The bad news is that the replacement from Nissan is R 15 k. Importing from Aus is more expensive and Partsouq in the UAE does supply but has no stock which you should land here for about R 7 k.
have you got a Nissan part no for that.....
Will get it. Forgot the old one which is in the box at Graham.
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Re: 4.5 Running rough?

Post by Peter Connan »

Can't one refurb it?

Grind the shafts and bush it up?
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Re: 4.5 Running rough?

Post by David M »

Peter Connan wrote: 01 Feb 2018 18:54 Can't one refurb it?

Grind the shafts and bush it up?
Yes but the tiny coil pack is now 20 years old and the optical sensor becomes slightly wonky and these can't be refurbished.

Mine was out by almost half a tooth due to wear so precise setting was a problem and you can feel the difference in the intensity of the spark being provided by the new coil pack.
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