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Coupes & Convertibles Scion tC Scion tC Problems and Solutions 
599 messages, Last post on Oct 30, 2006 at 12:06 AM
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Replying to: stickguy (Jul 20, 2004 7:31 pm) It's missing like I've put "bad" gas in it. But it's worse than that - I shouldn't say worse, just more pronounced than if it were simply bad gas or the compressor. By long throws, did you mean the clutch travel is long, or the shifter throws (which I don't consider long)? The clutch travel is long. I notice the rev sensation when depressing the clutch (as if I hadn't lifted entirely off the gas), but have no problems with a clean engage. Yes, that's what it's like EXCEPT the engage is blunt, for lack of a better word. If I depress really slow (I mean really slow), it will catch cleanly (all the while revving as if I'm still on the gas), but to depress as one would normally, it's a jerk, especially in 3rd. I believe the tC does have drive by wire throttle, so it is software deciding what RPMs to be at, not the drivers right foot. if thats the issue, its possible that a reflash might be in order. Or we will just get used to it and eventually wont even notice. What does the drive by wire throttle do exactly? I've been driving a stick since '83. I've logged hundreds of thousands of miles, literally - 80,000 in one year! I've never burned out a clutch nor have I ever had trouble shifting the way I do in this tC. I suppose some adjustment time (on my part) is to be expected but this isn't coming to me quickly. But, in all fairness, I've never owned or driven a car with this hp and torque before so I'm assuming I am the problem at this point.
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Replying to: rodzilla (Jul 21, 2004 5:53 pm) I'm glad to know you've experienced the skipping/missing effect. Sorry that it's happening to you but glad that you know what I'm talking about. It is disconcerting indeed. I must have bought the only lemon Mazda ever made. I traded my 03' 6i for my tC. It was six months old with 3000 miles! It handled okay but what a nightmare that thing was otherwise. From the moment I drove it off the lot things went wrong. First time I waxed it, the paint on the trunk at the corners of the spoiler chipped off. That was the first paint job. Two months later, it happened again. That was the second paint job. By then, the dealer was so pissed at the body shop that they sent it to another body shop to have it painted a third time (KY's lemon law is four strikes...not three). In between all this there were brake issues (the pads were loose so they had to be replaced, that was at 1000 miles and the calipers were wasted), two recalls and a myriad of other things. I lost some $$$ dumping it but it was so worth it when I saw the tC. |
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What's your rpm in 5th gear when you notice this missing? I'm wondering if you are prematurely in overdrive. If you are trying to use 5th gear below 2,000 rpm this could explain the problem. |
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| the way the tC is geared, that would be about 40 MPH. | |
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Guys, one thing about the engine in this car is the VVTI or variable valve timing with intelligence. Here's a short explanation about the intelligence part, it is not science fiction, it is fact. The engine and computer in this car actually "adjust" to your way of driving over time. If you like to drive quick and fast the software "remembers" your inputs. Same goes for the "granny" drivers. It remembers those drive inputs. The throtlle has the ETCS-i or electronic throttle control system with intelligence. Same concept as the engine. Also remembers your inputs, the drive by wire portion does away with the throttle or accelerator cable and is replaced by an electronic sensor which is very fast acting to your input on the accelerator. Next time you drive the car notice how fast it responds when you press the accelerator. : ) Mackabee
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Yes, stickguy, 2000 rpm would be about 40 mph and I'm feeling the miss regardless of either. The only factor I've found thus far is the AC but, like I said, even with it off the miss is still there just less so. Mack, everything you said makes sense. My question now would be: do I simply drive the tC like I drive my other cars and wait for the tC to adjust to me or is there a better approach? In this break-in stage, I am reluctant to do anything that might compromise the car. I'm only at 485 miles. And, yes, I had noticed the quick accelerator response very early on. So soon, in fact, that I thought perhaps the miss I was feeling was a result of some inability on my part to hold a steady accelerator pedal. But, when I got out on the highway and switched to cruise control in as flat a stretch as I could find, I thought differently. Is this also a product of VVTi? |
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Well if you are in fact at 2,000 rpm in 5th gear and you romp on the gas, you would be putting quite a load on the engine ("lugging") and you will get a protest from the engine I'm sure. If this miss occurs in all gears and regardless of rpm that's another matter. That's a problem. |
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You could probably start driving it the way you usually drive and not hurt anything. This vvt-i is very intelligent! Have fun and enjoy! : ) Mackabee |
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I have tested the tC with manual twice now, both times I noticed a poor throttle response, mainly off idle. It seemed to take measurable split seconds for the engine to respond while idling. Does this also occur while driving, such as downshifting. I am comparing to my '96 nissan 240sx which responds brilliantly to blip throttle downshifts, how does the tC do in the situation?? Can anyone confirm the drive-by-wire throttle? I have heard some say it is normal throttle cable and others say it has the drive by... Thanks! |
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