Tc tune up troubles

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05-15-2011, 04:44 PM

SPACEDOGB

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Location: Lake Charles, LA

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Tc tune up troubles

hello everyone,
I have a 2005 Scion tC that started giving me low idle problems and a CEL during a 19hr drive from louisiana to maryland. I took it into a shop and they told me that i needed new plugs and a new MAF sensor. Today I replaced the spark plugs with Denso (previous owner had some bosch plugs in) changed out the MAF (original was caked with oil and dirt so i didnt even bother trying to clean it). I managed to break everyone of those damn clips that hold the connectors onto the coil packs. I gapped them to .44 as per auto parts store. After all of this I am still getting a rough idle. The car doesnt wanna die anymore but still kinda runs a little rough. Any suggestions? Also is there anyway to replace those retaining clips on the spark plug connectors without major repair or can i just live without them? Thanks for any response

05-15-2011, 05:25 PM

TCpete

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look at your owners manual and see the correct spark plug gap. i think .44 is not correct just FYI

also did you reset your ecu? try doing that also.

05-15-2011, 05:50 PM

mmmpshh

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reset ecu, car has to re-learn fuel maps

05-15-2011, 06:17 PM

SPACEDOGB

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Does anyone know the proper gap? I just checked my car. I don't think it came with an owners manual

05-15-2011, 06:19 PM

mmmpshh

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I did some research and I think it is .44...?

found only one other gap size which was .39 - .43

05-15-2011, 07:09 PM

BadDudeTC3

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I have an 07 and I was told by the dealership that its .44

05-15-2011, 07:55 PM

SPACEDOGB

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Location: Lake Charles, LA

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Thanks for the responses. Anyone know what I can do for the broken connectors? Do they just offer the connectors or so I have to change part of the wiring harness?

05-15-2011, 10:29 PM

SoulXquisite

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-can't u just buy plugs that are pregapped?

05-15-2011, 10:42 PM

RS1_2047

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tC's tend to vibrate on idle... just deal with it (like the d*mn mother****ing hatch rattle!!!!)

05-15-2011, 10:43 PM

#10

RS1_2047

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^actually I like to say my car "purrs"... LMAO

05-16-2011, 03:53 PM

#11

DeAnzaJig

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Yes, thats is true, TC's dont idle the best from my experience. Especially with a simple i/h/e (ecu reset of course), the car idle's like CRAP. from both ts's i went through, the only time mine idled good was when it was turbo'd and had a 800 tune from ams. Just my .02