Black spark plugs
Discussion
I'm trying to get to the bottom of a small misfire in my TVR. It occurs around 1500 to 2000 RPM, it's only very small, but I notice it. It's also taking a long time to start.
I've removed the plugs today (so far only 4) and they're pretty black. What do you think? Are they too black, or is this normal on the RV8? I'm wondering if they're over oiled. I've got a compression tester, but it's the type you hold in the spark plug hole, so I can't do it when the engine is hot. I'll burn my hand!
DSC_6776 by danyeates, on Flickr
DSC_6778 by danyeates, on Flickr
DSC_6779 by danyeates, on Flickr
DSC_6780 by danyeates, on Flickr
DSC_6781 by danyeates, on Flickr
I've removed the plugs today (so far only 4) and they're pretty black. What do you think? Are they too black, or is this normal on the RV8? I'm wondering if they're over oiled. I've got a compression tester, but it's the type you hold in the spark plug hole, so I can't do it when the engine is hot. I'll burn my hand!
DSC_6776 by danyeates, on Flickr
DSC_6778 by danyeates, on Flickr
DSC_6779 by danyeates, on Flickr
DSC_6780 by danyeates, on Flickr
DSC_6781 by danyeates, on Flickr
Hi Dan, my plugs used to look like yours until I changed the 7's for 6's. Unless you are regularly driving hard then the standard heat range that TVR used will soot up. Lots of discussion on here if you search.
Can't say it will sort your slight misfire as it could be many things, but mine had that symptom until I changed the TPS!!
HTH
P
Can't say it will sort your slight misfire as it could be many things, but mine had that symptom until I changed the TPS!!
HTH
P
yknot said:
Hi Dan, my plugs used to look like yours until I changed the 7's for 6's. Unless you are regularly driving hard then the standard heat range that TVR used will soot up. Lots of discussion on here if you search.
Can't say it will sort your slight misfire as it could be many things, but mine had that symptom until I changed the TPS!!
HTH
P
Thanks. TPS = throttle position sensor?Can't say it will sort your slight misfire as it could be many things, but mine had that symptom until I changed the TPS!!
HTH
P
QBee said:
My car went out this morning for the first time in a week. Three miles into my local town, traffic, traffic, traffic, then three miles home again.
I took out one plug, B7ECS, and have photographed it and the collateral damage. Get a crayon and draw your own conclusion.....
That's running good, now man up and don't moan about a scratch it's the nature of the game.I took out one plug, B7ECS, and have photographed it and the collateral damage. Get a crayon and draw your own conclusion.....
Thanks Simon!
I love the way my Chim starts first time every time,, even though it lives outside, and runs brilliantly, even when i have just washed all the bits of hedge off the bonnet with the full force of the hose pipe.
Utterly reliable. Total joy to drive.
Every time I get the urge to super/turbo-charge or LS it, Mat Smith twists my wallet arm up behind my back, and reminds me that my car is lovely to drive and faster than my talent, so i should leave well alone and enjoy it. He has driven it around Snetterton himself after he installed the V8D 5 litre lump, and he couldn't believe what a friendly beast it is to drive.
And no stupid electrical gremlins, unlike my daily Vorskin Durch Technik. In the recent rain I have had handbrake warning light on, car locking and unlocking itself 10 times a minute at 60 mph, flashing its headlights, alarm going off for no reason, front doors deadlocked while the rears were unlocked, not responding to the key, brake lights stuck on for 15 miles, etc etc. Bloody German rubbish.....
I love the way my Chim starts first time every time,, even though it lives outside, and runs brilliantly, even when i have just washed all the bits of hedge off the bonnet with the full force of the hose pipe.
Utterly reliable. Total joy to drive.
Every time I get the urge to super/turbo-charge or LS it, Mat Smith twists my wallet arm up behind my back, and reminds me that my car is lovely to drive and faster than my talent, so i should leave well alone and enjoy it. He has driven it around Snetterton himself after he installed the V8D 5 litre lump, and he couldn't believe what a friendly beast it is to drive.
And no stupid electrical gremlins, unlike my daily Vorskin Durch Technik. In the recent rain I have had handbrake warning light on, car locking and unlocking itself 10 times a minute at 60 mph, flashing its headlights, alarm going off for no reason, front doors deadlocked while the rears were unlocked, not responding to the key, brake lights stuck on for 15 miles, etc etc. Bloody German rubbish.....
rigga said:
Sardonicus said:
hat's running good, now man up and don't moan about a scratch it's the nature of the game.
nowt wrong with the plug, you're just cack handed on the tools ...QBee said:
My car went out this morning for the first time in a week. Three miles into my local town, traffic, traffic, traffic, then three miles home again.
I took out one plug, B7ECS, and have photographed it and the collateral damage. Get a crayon and draw your own conclusion.....
That's running good, now man up and don't moan about a scratch it's the nature of the game.I took out one plug, B7ECS, and have photographed it and the collateral damage. Get a crayon and draw your own conclusion.....
yknot said:
Wow!!! Now you've been told three times!
Ah, the Mini, how I remember being able to de-coke in a (extended!) lunch time!! Blood on the drawing board wasn't a problem in those days as HSE hadn't been invented, haha!!!
Fond memories.....I changed a clutch and gearbox. With ny skill set it took me three weeks and cost me an arm and a leg..... Ah, the Mini, how I remember being able to de-coke in a (extended!) lunch time!! Blood on the drawing board wasn't a problem in those days as HSE hadn't been invented, haha!!!
QBee said:
Thanks Simon!
I love the way my Chim starts first time every time,, even though it lives outside, and runs brilliantly, even when i have just washed all the bits of hedge off the bonnet with the full force of the hose pipe.
Utterly reliable. Total joy to drive.
Every time I get the urge to super/turbo-charge or LS it, Mat Smith twists my wallet arm up behind my back, and reminds me that my car is lovely to drive and faster than my talent, so i should leave well alone and enjoy it. He has driven it around Snetterton himself after he installed the V8D 5 litre lump, and he couldn't believe what a friendly beast it is to drive.
And no stupid electrical gremlins, unlike my daily Vorskin Durch Technik. In the recent rain I have had handbrake warning light on, car locking and unlocking itself 10 times a minute at 60 mph, flashing its headlights, alarm going off for no reason, front doors deadlocked while the rears were unlocked, not responding to the key, brake lights stuck on for 15 miles, etc etc. Bloody German rubbish.....
Is that using the key or bump starting I love the way my Chim starts first time every time,, even though it lives outside, and runs brilliantly, even when i have just washed all the bits of hedge off the bonnet with the full force of the hose pipe.
Utterly reliable. Total joy to drive.
Every time I get the urge to super/turbo-charge or LS it, Mat Smith twists my wallet arm up behind my back, and reminds me that my car is lovely to drive and faster than my talent, so i should leave well alone and enjoy it. He has driven it around Snetterton himself after he installed the V8D 5 litre lump, and he couldn't believe what a friendly beast it is to drive.
And no stupid electrical gremlins, unlike my daily Vorskin Durch Technik. In the recent rain I have had handbrake warning light on, car locking and unlocking itself 10 times a minute at 60 mph, flashing its headlights, alarm going off for no reason, front doors deadlocked while the rears were unlocked, not responding to the key, brake lights stuck on for 15 miles, etc etc. Bloody German rubbish.....
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