Denso plug???

[NorCalTurbos]

Today I had a lil time so I wanted to check my plugs which should be cool they have less than 1000 miles on them. But I've been having a misfire for a while I can't track done. My #2 plug was a denso the rest are ac like I installed, looks like the shop changed my plug and didn't say a thing could this be causing the miss and knock under boost? Should I change all the plugs or just the denso one the shop put in? Any help is greatly appreciated

 

[getdowngranny]

It could be caused by the plug depending on the heat range and type of plug. I would just throw a fresh set of plugs on it. 20 minutes and 20 bucks.


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[Sue Mobley]

I have a 86 Grand National. Piston 2 is knocking, still runs. Need a mechanic in the Tampa Bay Area.

 

[getdowngranny]

I have a 86 Grand National. Piston 2 is knocking, still runs. Need a mechanic in the Tampa Bay Area.

Knock as in Knock Retard or metal on metal knock? If I'm not mistaken there are a few trusted mechanics in the Tamp area. Julio Don, Don Cruz, maybe more.


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[Sue Mobley]

Knock as in Knock Retard or metal on metal knock? If I'm not mistaken there are a few trusted mechanics in the Tamp area. Julio Don, Don Cruz, maybe more.


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Metal on metal. Looking to fix and sell. All original, 42k miles.

 

[CzyKats44]

That escalated quickly ... looking for mechanic to selling ????

Might want to post in this thread if you are serious about selling:

http://www.turbobuick.com/forums/forums/cars-for-sale.26/

 

[CzyKats44]

Today I had a lil time so I wanted to check my plugs which should be cool they have less than 1000 miles on them. But I've been having a misfire for a while I can't track done. My #2 plug was a denso the rest are ac like I installed, looks like the shop changed my plug and didn't say a thing could this be causing the miss and knock under boost? Should I change all the plugs or just the denso one the shop put in? Any help is greatly appreciated

FWIW to get the thread back to you. I have a full set of Densos and no complaints ...

 

[dynoman]

Back in the late 80's I changed the plugs on my 86 GN . After the change my car would break up a little at WOT , so since it was under warranty I took it to the dealer and explained the problem and what I had done. After 2 days they tell me they don't know what's wrong . Being that I'm a GM employee I threatened to call the Zone office ( which they hate to hear ) and then I got their attention . The service manager said lets start from scratch . He said " I know you changed the plugs but we're going to change them again and go from there " . The next day all fixed . He told me one of the plugs in the box of 6 was different by a letter designation on the plug and he showed me the set I put in . Moral of the story , replace them all , and all the same . Sam

 

[Sue Mobley]

That escalated quickly ... looking for mechanic to selling ????

Might want to post in this thread if you are serious about selling:

http://www.turbobuick.com/forums/forums/cars-for-sale.26/

Thanks

 

[NorCalTurbos]

Back in the late 80's I changed the plugs on my 86 GN . After the change my car would break up a little at WOT , so since it was under warranty I took it to the dealer and explained the problem and what I had done. After 2 days they tell me they don't know what's wrong . Being that I'm a GM employee I threatened to call the Zone office ( which they hate to hear ) and then I got their attention . The service manager said lets start from scratch . He said " I know you changed the plugs but we're going to change them again and go from there " . The next day all fixed . He told me one of the plugs in the box of 6 was different by a letter designation on the plug and he showed me the set I put in . Moral of the story , replace them all , and all the same . Sam

Good info, thanks

 

[NorCalTurbos]

FWIW to get the thread back to you. I have a full set of Densos and no complaints ...

Yea I'll probably just throw a fresh set in, the guys at that shop only changed one and its denso the rest are AC. I've been dealing with this shop since I was 16 never had issues with them, kinda hard to believe that they could drop the ball like this. I will post results asap