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I need help! I just replaced my factory spark plugs with NGK spark plugs on my 2014 is250 Fsport. Everything went fine followed the book but after I have a check engine display and “Trac off” display... any tips and is this typical?
Last edited by LouieP; Oct 27, 2019 at 04:24 PM.
Reason: Details
Check that everything was reassembled correctly and that you didn't leave anything disconnected when you removed the intake manifold. Did you replace the gaskets?
(TRAC related MIL is usually a result of a powertrain code if both lights are on, check the codes).
The IS250 and IS350 use different plugs...if you bought the NGK version for the 250, do yo know what spark plug number it is?
And the TRAC light is only on because the CEL is on. Once you fix that CEL, then the TRAC light should go out too.
The IS250 and IS350 use the same spark plugs. It’s possible they were still the wrong plugs. Your best bet at this point is to find out the code(s) and go from there.
The IS250 and IS350 use the same spark plugs. It’s possible they were still the wrong plugs. Your best bet at this point is to find out the code(s) and go from there.
Jeff
May bad...you are correct of course.
The confusion was between my 2014 IS and my 2014 Highlander. My Highlander has the 3.5L V6, similar to the IS350, but no direct injection.
It uses a slightly different DENSO number for the spark plugs.
NGK website confirms they do fit an IS250. First glaring difference between the NGK and Denso is that the Denso has 3 ground electrodes at the tip, and the NGK has one.
The second glaring difference is the heat range.
Back in the day when Toyota first introduced double ground electrode plugs, around the mid-90's, if you installed a single ground electrode plug instead, you would get misfire codes.
The vehicle would seemingly run ok.
Check to see what the code is first.
So I got the codes checked and I was told the manifold code keeps popping up... I probably forgot to fully connect something but what?.... I checked all the obvious ones, any advice guys?
Do you know what the code is exactly? Like the code number or description.
The "manifold code" doesn't really help much. The code will likely name a specific component in it's name, so that should point you exactly to something that could be disconnected.
Here are all the "manifold" codes the ECU can generate:
@Sasnuke he didn’t specify and I didn’t get a chance to view the code it but that link definitely helped, I also think it’s possibly a hose towards the back of the manifold by the fuel line
What model Toyota uses the same Denso spark plugs as my 2014 IS250 f sport?
The Denso plug FK20HBR11, when you go to the Denso site, shows that it only fits Lexus...basically any vehicles that use a variant of the GR-FE engine. They only show fitment up to 2017 though, so likely they haven't update for 2018+ yet.
So to answer your question, it looks like none.
My 2014 Highlander that I mentioned above uses the Denso FK20HR11...you will note it's almost the same number, but the "B" is missing, which makes it a completely different plug as it only has 1 ground electrode now, instead of 3.
Spark plug replacement
