NGK spark plugs
Discussion
Mk1 Tuscan s 2001
Car has recently had 12000 mile service, I assume the plugs are replaced then. On inspection the plugs are gapped at 0.7mm and are a nice bronze colour at the electrode, the china is uncracked and tight also looks like new. Problem is the engine every 200 miles starts to misfire briefly under load not high revs. check the diag software and there are no faults recorded, HT leads seem to be in good condition (Magnecor). Change the plugs and all is well for another 200 miles approx when misfire reappears, change the plugs again and all is well.
Just wondered if spd 6 engine is renouned for eating plugs NGK DCPR8E or maybe just a dodgy batch.
Does anybody know if there is a more robust plug
Thanks in advance
Steve
Car has recently had 12000 mile service, I assume the plugs are replaced then. On inspection the plugs are gapped at 0.7mm and are a nice bronze colour at the electrode, the china is uncracked and tight also looks like new. Problem is the engine every 200 miles starts to misfire briefly under load not high revs. check the diag software and there are no faults recorded, HT leads seem to be in good condition (Magnecor). Change the plugs and all is well for another 200 miles approx when misfire reappears, change the plugs again and all is well.
Just wondered if spd 6 engine is renouned for eating plugs NGK DCPR8E or maybe just a dodgy batch.
Does anybody know if there is a more robust plug
Thanks in advance
Steve
Same problem on my Tam, it also used to pop & bang as you accelerated as well as on the overun. Castle fixed it with new HT leads £40 plus a whopping £90 to fit which included diagnosing the fault on Friday. I think the theory goes..... Greater load at lower revs which is why you get the misfire/hesitation as the strength of the spark is effected as the lead breaks down?. The std TVR leads fitted from new were a bit bobbins.
There is also a article I read somewhere about HT leads which in a nut shell said price isn't everything; good leads have to strike a balance between heat resistance and durability and the best material for heat resistance is silicone which is not so good when it comes to durability
There is also a article I read somewhere about HT leads which in a nut shell said price isn't everything; good leads have to strike a balance between heat resistance and durability and the best material for heat resistance is silicone which is not so good when it comes to durability
Edited by shep1001 on Monday 26th January 22:19
An interesting read this topic.
After I had fitted an Emerald ECU to my Tuscan and got it started it was running rough (new NGK plugs fitted). I eventually got things running better whilst messing with fuel settings etc... shut the engine off to allow things to cool. Went to restart and it was a b
h to get it to catch and keep running. Stopped the engine and selected the previous map that I had managed to get the car started with. Turned the engine and heard a loud back fire. Then the car would not start at all, no matter what not even a cough. I checked for a spark on number one.... nothing, number 2 nothing. After ruling out the coil and leads (resistance check), I was scared I had done something with the triggers in the ECU. Eventually put the old plugs in.... started fine. 3 of the 6 new plugs were goosed.... never come across this before. Now having read the posts above I am guessing NGK's are somewhat intolerable to out of time cylinder explosions....?!?
Can anyone elaborate?
After I had fitted an Emerald ECU to my Tuscan and got it started it was running rough (new NGK plugs fitted). I eventually got things running better whilst messing with fuel settings etc... shut the engine off to allow things to cool. Went to restart and it was a b
h to get it to catch and keep running. Stopped the engine and selected the previous map that I had managed to get the car started with. Turned the engine and heard a loud back fire. Then the car would not start at all, no matter what not even a cough. I checked for a spark on number one.... nothing, number 2 nothing. After ruling out the coil and leads (resistance check), I was scared I had done something with the triggers in the ECU. Eventually put the old plugs in.... started fine. 3 of the 6 new plugs were goosed.... never come across this before. Now having read the posts above I am guessing NGK's are somewhat intolerable to out of time cylinder explosions....?!?Can anyone elaborate?
yzf1070 said:
An interesting read this topic.
After I had fitted an Emerald ECU to my Tuscan and got it started it was running rough (new NGK plugs fitted). I eventually got things running better whilst messing with fuel settings etc... shut the engine off to allow things to cool. Went to restart and it was a bh to get it to catch and keep running. Stopped the engine and selected the previous map that I had managed to get the car started with. Turned the engine and heard a loud back fire. Then the car would not start at all, no matter what not even a cough. I checked for a spark on number one.... nothing, number 2 nothing. After ruling out the coil and leads (resistance check), I was scared I had done something with the triggers in the ECU. Eventually put the old plugs in.... started fine. 3 of the 6 new plugs were goosed.... never come across this before. Now having read the posts above I am guessing NGK's are somewhat intolerable to out of time cylinder explosions....?!?
Can anyone elaborate?
I went for 8.5mm leads, thing is I don't like the way the leads are squashed under the spark plug cover. So when fitting new leads last night I fitted some spacer washers between the plug cover and the rocker/cam cover so that the leads are free to move around and less chance of 2/3 of the leasds being pressed down on each other, finally because the plug cover is now raised slightly due to the spacers I sealed it from water ingress using Hylomar silicon sealer. Don't look to pretty but hey the bonnets bolted down and no ones gonna see it anyway. Drove the car hot and cold and there is a major improvement obviously because of the new for old leads. I just want to prevent the leads/plugs from breaking down when it does get hot.After I had fitted an Emerald ECU to my Tuscan and got it started it was running rough (new NGK plugs fitted). I eventually got things running better whilst messing with fuel settings etc... shut the engine off to allow things to cool. Went to restart and it was a b
h to get it to catch and keep running. Stopped the engine and selected the previous map that I had managed to get the car started with. Turned the engine and heard a loud back fire. Then the car would not start at all, no matter what not even a cough. I checked for a spark on number one.... nothing, number 2 nothing. After ruling out the coil and leads (resistance check), I was scared I had done something with the triggers in the ECU. Eventually put the old plugs in.... started fine. 3 of the 6 new plugs were goosed.... never come across this before. Now having read the posts above I am guessing NGK's are somewhat intolerable to out of time cylinder explosions....?!?Can anyone elaborate?
Steve
BGB autosport said:
Than, will have a look. Mine has got a high rev miss and a sooty exhaust on one side. Going to give it a good service inc leads and hopefully it will sort it.
Trouble is you tend to think the worst "Disaster spd6 misfire engine gonna blow up" as i did. But at the end of the day there's only a coil pack, leads and plugs. nelly1 said:
Chim326 said:
Trouble is you tend to think the worst "Disaster spd6 misfire engine gonna blow up" as i did. But at the end of the day there's only a coil pack, leads and plugs.
Ha! We'll have none of your wretched optimism on here!Away with you...
You coming for a drive next Sunday Niell
Did you get your car fixed?
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