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97 pathfinder engin...
 
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97 pathfinder engine ping

  

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I’m experiencing some engine pinging anywhere between 1300rpm and 2500rpm. Especially good if uphill or when the engine is under more load with the A/C on.

Everything has been maintained on it recently. New injectors, intake gaskets, IACV, TPS, MAF, Nissan plugs, new ngk leads, injector rail to intake seals, knock sensor, coolant hoses, new coolant.

I did replace the distributor last year, again Nissan original part purchased. That I had my Nissan mechanic install. However he didn’t use a timing light. He just marked it up with the old one and then put the new one it. But I did really experience pinging much until now.

I’m not sure if it’s the gas. I’ve been fulling for a while at a Mobil station with 87 octane. So I’m my last fill up I decided to 89 octane at a shell station. It was half tank I filled up on top of the previous gas. Still pinging so far.

Should I wait a couple more fill ups with the 89? Try and octane booster? Or do I need the timing to be reset?


2 Answers
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I would up the fuel to high test though not extremely advertised the Nissans primarily v6 models have a higher compression. I would switch to high test for a few tank fills before condemning fuel as the cause of concern 


So the highest octane try for a few tanks?


Ya I’m not sure what’s offered in your area around me that would be 93 octane


Yep, the same here also


0

The replacement distributor must be properly adjusted to specifications.  Even slightly over advanced ignition timing can cause pinging.


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