Could you give me some more information on the wire please?

Thank you in advance.

I'm having the same problem with my truck too but i have the 268 cam. I can't plus i can't set the tps correctly

I learned about this from 4crawler's pages but I had to track down the wire myself because the info he gave said the wire was different on different years.

I also found that I only had one wire going in, not one in and one out like the page said.

Anyway. I documented it in a thread over at yotatech.

http://www.yotatech.com/showthread.php?t=103923&highlight=fluctuating+idle

Just for the sake of clarity, the title of this thread should be changed. I don't like seeing a title imply blame on a specific part and then seeing that many additional parts were added at the same time and numerous components not adjusted properly. The title itself might be enough to turn a person off of a product that isn't related to the issue at all.

Adjust your TPS and then re-adjust the timing before you go cutting things.

Numerous components are not adjusted properly BECAUSE the motor will not idle hardly below 1000 rpm. Even when setting the timing it does not idle well.

I come from building small black chevy motors. The cam will HAVE The largest influence.

It had a freer flowing exhaust then it does now, AND a custom intake that was freer flowing.

That leaves the cam.

It is a valid title.

I plan to.

A cam can have an influence. The Toyota EFI isn't as sensitive to cam changes as *some* domestic systems because it doesn't use a MAP sensor. As such, vacuum at idle doesn't matter as much to the EFI..

Coming from Chevy motors, you know that a lot of things are going on internally. You've done some work that you think narrows it down to the cam. I'd suggest, in order to confirm, that you'd have to swap the OEM cam back in and have everything work right to know for 100% sure.

If these camshafts couldn't be setup on EFI systems, Ted wouldn't sell them.

>>>*The gentleman's email came in first with the same heading. I doubt he means anything by it.

It doesn't bother me any, I can't keep cams in my building anyway. I have 200 on back order right now and had to quit listing until I get restock.

The simple fact IS that any cam change combined with other additions certainly CAN equal problems, we have no choice but to design from a bone stock application, of course.

So I want a solution, just trying to help, figure out what is going on. I am way behind a lot of you folks on tuning problems, thus I suggested the gentleman post his concerns here so my peers can offer help.

Since the vast majority of users report nice results, I need to know what is different here.

That is why I personally bumped this thread, I could have just let it go off into cyberland and forgot it.

I think that what is going on is a combination of additions, these engines are sensitive to changes. The 261C is so close to the Comp Cams 260 that some mistake it, not noticing the nose design for quieter operation and the fatter ramps. The profile is simple and will normally have zero detrimental effect on the way the engine runs, simply adding air flow potential for some power gains.

Yet some report a chattery idle, some report smooth as silk, some report a need to bump up the idle speed by around 50-100 or so, and rarely...something wrong!

Of course if another problem exists, adding intake airflow can aggravate it. I just want to know.

*But I do have one suggestion for a possible test. If the current lash setting is our suggested minimum of .007" intake and .009" exhaust, then open up the valve lash to stock .008" intake and .012" exhaust. This effectively shortens the exhaust duration by a surprisng amount and makes it tougher for the exhaust to overscavenge which the very free flowing LCE header can do. The design runs noisier there but that is harmless.......*EB

It wasn't an attack on you, personally, but I stand behind the title being misleading. You changed a lot and haven't adjusted other things that do affect the idle issue (TPS being a major contributor), but you believe it's the cam. Ted builds good stuff, and as already mentioned, the Toyota EFI system is VERY lenient when it comes to cam swaps. I've done a number myself with nary the problem you mention. The intake mods could easily cause this problem as well; the point being, the entire picture needs to be considered, not just the cam.