Hi Guys and Gals,
I bought a twenty year old K11 in turquoise three months ago, from a private seller, who specialised in Micras of the K11 variety. The car looked pretty, and was to be used as a runaround it's main purpose being to be towed on an "A" bracket behind my motorhome which being ten metres long is no good for nipping down to the supermarket when you reach your destination. The twenty year old K11 had 22,000 miles on it's clock, which was genuine, and a look around the car reveals that the mileage is genuine.
The guy that I bought it from being an "expert" in K11's told me after a test drive, that the misfire, will get better, when the "new" petrol works its way through the system, as the car has stood for a number of years in a garage, and that was the cause of the misfire.
I bought the car, and drove it to a garage and filled the tank. The misfire continued. I took it onto the M25 motorway to give it a blast, and thought that maybe the problem was persistent cold starting had carbonated the plugs, with over rich mixture, or something akin to that. I took the car to sixty mph in fourth, and it ran clean at that speed, but immediately the traffic built up in town, the misfire came back ,and the driving quality was rubbish below about two thousand rpm, with a kangaroo effect in the first three gears until middle engine speed had been reached.
I lifted the bonnet when I got back home, and familiarised myself with the layout of the components, and then took out the plugs, and lifted the distributor cap. I noted that the plugs were new KLG and the cap was slightly oxidised at the contacts. These were cleaned up, and the plugs were re-gapped to about 20thou. being standard at 38thou. previously.
The improvement in running was immediate, but still not perfect, and in a few weeks , the 22,000 miles went up to 26,000, but the running was not right yet.
The deterioration in performance reached a head last weekend, when the same misfire started and became annoying.
I called into a car parts store, and asked if they had any NGK plugs with NO RESISTOR built in, for example NGK BCP6ES-VP4 . They had a set of four, and I fitted them after re-gapping down to 15thou.
The difference was instant. The startup hot or cold is spot perfect, with NO churning of the starter motor, just a zip!! and engine fires, runs clean , and accelerates clean right through the rev range . Today I did another two hundred miles, mixed motoring heavy traffic, and motorway, and have used a complete tank since the plug change, and the results are perfect. The best clean acceleration and much improved mileage per gallon.
Take a tip, do not fit Resistor plugs, fit solid copper core, the type I used are NGK BCP6ES-VP4.
Happy Motoring boys and girls !!!!!!!!!!!!
I bought a twenty year old K11 in turquoise three months ago, from a private seller, who specialised in Micras of the K11 variety. The car looked pretty, and was to be used as a runaround it's main purpose being to be towed on an "A" bracket behind my motorhome which being ten metres long is no good for nipping down to the supermarket when you reach your destination. The twenty year old K11 had 22,000 miles on it's clock, which was genuine, and a look around the car reveals that the mileage is genuine.
The guy that I bought it from being an "expert" in K11's told me after a test drive, that the misfire, will get better, when the "new" petrol works its way through the system, as the car has stood for a number of years in a garage, and that was the cause of the misfire.
I bought the car, and drove it to a garage and filled the tank. The misfire continued. I took it onto the M25 motorway to give it a blast, and thought that maybe the problem was persistent cold starting had carbonated the plugs, with over rich mixture, or something akin to that. I took the car to sixty mph in fourth, and it ran clean at that speed, but immediately the traffic built up in town, the misfire came back ,and the driving quality was rubbish below about two thousand rpm, with a kangaroo effect in the first three gears until middle engine speed had been reached.
I lifted the bonnet when I got back home, and familiarised myself with the layout of the components, and then took out the plugs, and lifted the distributor cap. I noted that the plugs were new KLG and the cap was slightly oxidised at the contacts. These were cleaned up, and the plugs were re-gapped to about 20thou. being standard at 38thou. previously.
The improvement in running was immediate, but still not perfect, and in a few weeks , the 22,000 miles went up to 26,000, but the running was not right yet.
The deterioration in performance reached a head last weekend, when the same misfire started and became annoying.
I called into a car parts store, and asked if they had any NGK plugs with NO RESISTOR built in, for example NGK BCP6ES-VP4 . They had a set of four, and I fitted them after re-gapping down to 15thou.
The difference was instant. The startup hot or cold is spot perfect, with NO churning of the starter motor, just a zip!! and engine fires, runs clean , and accelerates clean right through the rev range . Today I did another two hundred miles, mixed motoring heavy traffic, and motorway, and have used a complete tank since the plug change, and the results are perfect. The best clean acceleration and much improved mileage per gallon.
Take a tip, do not fit Resistor plugs, fit solid copper core, the type I used are NGK BCP6ES-VP4.
Happy Motoring boys and girls !!!!!!!!!!!!
