Wrong spark plugs? I need help.

[Rislove]

Hi, my name is Gordon. My 1986 Celica has a motor swap from an 1995 MR2, the 3s-gte engine. I changed out the spark plug the other day and it ran good for about two days. Than it started kinda of puttering or cutting out, I think maybe misfire. The more I drove the worse it got. I put my old spark plugs back in and it worked much better but not quite back to normal. I went back to autozone and swapped out the new spark plugs after finding out they gave me some with to high of a heat range. The ones I have now are a 3. But this time it only lasted for about a few miles before it started doing it again.
Does any one have any idea what to do?

[humanoid]

Try going to sparkplugs.com and see what plugs came as OEM parts with your engine and get those plugs, maybe that'll help.

[MR2Jedi]

I use NGK 6097 coppers. Heat range 7. Unlike other plugs, with NGK, the higher the number, the colder the plug. You can can cross reference that number and use platinums if you wish.
If you were using NGK's with the heat range 3, thats too hot.
Are you sure the plugs were the problem? Did you change/adjust anything else? Check Timing?

[TheEngineer]

im sure your just running normal boost so you really only need a heat range 6 in that. Id stick with the BKR6ES NGK coppers. Here has the best price i have found for them
http://www.rockauto.com/catalog/raframecatalog.php

$1.80 per plug with a pack of 4

[Ghostyman]

Originally Posted by MR2Jedi

I use NGK 6097 coppers. Heat range 7. Unlike other plugs, with NGK, the higher the number, the colder the plug. You can can cross reference that number and use platinums if you wish.
If you were using NGK's with the heat range 3, thats too hot.
Are you sure the plugs were the problem? Did you change/adjust anything else? Check Timing?

I believe NGK item 6097 has been discontinued. I forget the new item number but you want NGK spark plug code BKR7E. The 6097 is just the item number for a four pack of BKR7E plugs. The plugs should be $2-3 each.

[MR2Jedi]

Originally Posted by Ghostyman

I believe NGK item 6097 has been discontinued. I forget the new item number but you want NGK spark plug code BKR7E. The 6097 is just the item number for a four pack of BKK7E plugs. The plugs should be $2-3 each.

Yeah, you're right. I have to order them every time cuz they never stock them. I always tell them NGK 6097 . They never say anything about the number and they just order them.
When they come in, the box says BKR7E. - but it's never in a 4 pack...hmm..
Just under $10.00 for all 4 (O'Reilly's)

[Rislove]

Hi, the plugs I was running were the NGK 739-BCPR6EY-11 I was told they are a low heat range. And my car isn't pushing to much more boost than stock but the turbo was swapped from a Supra with a lil bit more. I'm kinda new to this thing so I don't know a whole lot.
The car ran smooth before I changed the plugs, so I am pretty sure that was the problem. I finally found the ones I was running before, cost me $20. Wish I would of checked here before I bought them.

[Rislove]

Well I am still waiting for my spark plugs that I ordered. But I never messed with the timing or anything else. Just the plugs. As soon as I changed them it ran like crap, thats why I figured it was the plugs. Autozone is trying to tell me the higher the number the hotter. Butt they messed up my last car to, so who knows if they can really be trusted. But the car would run fine with the new spark plugs for a little while and than after a coupe miles it would start doing it again. OR when I started it up in the morning it would be fine till it warmed up.

[BDSL]

Also check your spark plug wires, distributor rotor and distributor cap.

[MR2Jedi]

Those guys at Autozone don't know what they're talking about.
From the NGK site:

NGK Spark Plugs Heat Rating

The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. The heat range of a spark plug is the range in which the plug works well thermally. The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type.

Heat rating and heat flow path of NGK Spark Plugs

[Rislove]

Originally Posted by MR2Jedi

Those guys at Autozone don't know what they're talking about.
From the NGK site:

NGK Spark Plugs Heat Rating

The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. The heat range of a spark plug is the range in which the plug works well thermally. The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type.

Heat rating and heat flow path of NGK Spark Plugs

Well thank you a lot, definitely helps a lot.
Oh and BDSL how do I check all those things, just check to make sure everything is connected right or to see if they need to be replaced? Because I'm not sure on how to check if they need to be replaced...

[MR2Jedi]

Pull your distributor cap and rotor and look for pitting on the metal terminals. You can test the wires by using a multimeter. But many techs have told me that test is not a good way to tell if there bad or not.
You can remove the spark plug wire from the plug, hold it close to a bare metal surface on your valve cover with out actually touching the metal,crank the engine and watch for a spark to arc to the metal surface.I would also suggest looking for cracks in the insulation.
If they're more than 4 or 5 years old, I would just replace them though.

[Rislove]

Alright, will have to check all that.
Do you know anything about adjusting blow off valves? I have an HKS blow off valve and there is an adjusting screw on the back. I have asked two people about it and they both told me something different.