New KPRO Eng Surging

guamrsx · Post by **guamrsx** » Tue Aug 02, 2005 12:53 am

Hey does anyone know how to get rid of the eng surging. I just put this thing in after it warmed up a bit it started surging from 1000 to 2000 rpm. I have no clue what to do and this is the only way I can think of to get some help.

02SilverSiHB · Post by **02SilverSiHB** » Tue Aug 02, 2005 5:43 am

saw your reply on cn forum. does it move up and down like there's a vac leak?

Or, say your driving. you come to a stop, the needle stays at 1500 and might move up to 1700 or so real slowly, then a few seconds later, it falls down slowly to 1000 at idle and then it's fine? If so, that's what mine does. Doesn't phase me at all.

Post by **Hondata** » Tue Aug 02, 2005 8:39 am

The most common cause of a high idle is a vacuum leaks. Check all vacuum lines from the manifold - if they are rubber or silicone you can pinch them off, and if the idle drops than you have a vacuum leak.

With the ECU first check that your TPS is adjusted. When datalogging (the engine doesn't need to be on) you should see -1 to 1% throttle. If not, adjust the TPS.

Second zero the cam angle table around the idle area (see picture below).

Third reduce the ignition timing on the zero cam angle around the idle area (see picture below). I've used 18.5 degrees but you can go down to 10 degrees or less.

Fourth adjust the idle speed to around 50 rpm less than what you want (see the last picture). Adjust the IAC slider so that when you rev the engine to 2500 rpm and release the throttle the tach will drop to your target idle without dipping below your target. If this happens, move the slider to the right. If the tach drops and then 'hangs', slowly dropping to your target idle, move the slider to the left.

Hope this helps - check for vaccum leaks first.

guamrsx · Post by **guamrsx** » Tue Aug 02, 2005 2:27 pm

Ok great thanks for the info I will play with it when I get home from work tonight. With it surging it makes it real hard to drive slow. In our housing area you have to go 15 mph or you get a ticket and the motor just jerks around like crazy. Get her out on the open road and man she will fly like the eagle.

guamrsx · Post by **guamrsx** » Tue Aug 02, 2005 4:39 pm

You say in the first part to check for vacuum leak. I havent touched anything when it comes to vacuum lines since I took off the guardian module. My A/F gauge keeps bouncing from rich to lean and back and forth while the car is surging. How do you adjust the TPS? I can't seem to find it in the software. I have the updated software so hopefully you can point me in the right direction. I figured out how to play with the other settings. Should I make these changes and then save and then upload or should I put it into open loop and do the settings while the car is running? thanks

Post by **Hondata** » Tue Aug 02, 2005 6:42 pm

Remove the AF gauge - it could be part of the problem.

You adjust the TPS by rotating the TPS - there should be instructions in this forum.

Check for vacuum leaks by pinching off the hoses - any drop in idle speed means there is a problem.

Post your calibration and a datalog here if you can.

guamrsx · Post by **guamrsx** » Tue Aug 02, 2005 9:46 pm

I think I finally got it to settle down. It seems ok now. I just had to play with the setting that you gave me. I will get datalog tonight and see if I can send it too you. OH i figured out how to start recording the datalog but I am not sure how to attach it so that you can see it. I am going to do a search here and see if something pops up.

guamrsx · Post by **guamrsx** » Tue Aug 02, 2005 10:51 pm

Hondata do you guys there at the shop have any idea which wire I need to connect to in order to hook up my autometer water temp gauge? I was told the red w/white strip on the second plug from the left if you were looking straight at the ECU. When I did this the gauge would read actually 50 degrees hotter than what the kmanger said it is. Also when I tapped into this wire my gauge on the dash went dead. As soon as I disconnected this wire my gauge on the dash comes back. Any ideas which wire will help and will be greatly appreciated. If this is impossible do you know where I can install the temp probe that came with the gauge?

Post by **Spunkster** » Wed Aug 03, 2005 9:25 am

You should not hook up any aftermarket gauges to the stock gauges, as it will affect their accuracy or functionality.

Post by **Hondata** » Wed Aug 03, 2005 1:17 pm

Yes - the answer is not to connect it.

You cannot connect another gauge to the water temperature sensor. The ECU measures the voltage drops across the sensor and the autometer will disrupt this measurement by adding it's own voltage.

guamrsx · Post by **guamrsx** » Wed Aug 03, 2005 1:40 pm

Ok I guess I can't hook the sending unit wire there, but then where on the motor can I install the temp probe that came with the gauge. I would really like to see how hot the temp is getting while running the turbo. Thanks for all the help thus far.

guamrsx · Post by **guamrsx** » Wed Aug 03, 2005 7:12 pm

OK Hondata here is a datalog that I took while cruising through my housing area at about 15 mph. Then I did a short boost at the end so that you can get both readings. Please look it over and make sure everything looks ok. I finally got the idle to come down but I just wanted to make sure everything is fine. Thanks for your help

Post by **Hondata** » Thu Aug 04, 2005 8:20 am

The datalog is short but shows a big short term fuel trim - you need to get the car tuned. Can't see anything else that looks wrong.

guamrsx · Post by **guamrsx** » Thu Aug 04, 2005 12:46 pm

I didn't realize that it was that short, I will take another one on my way to work and submit it and see. I have no one here on the island of Guam that can tune, this is why I want to make sure everything is ok. Once I get back to the states then I will have it tuned. Thanks

02SilverSiHB · Post by **02SilverSiHB** » Thu Aug 04, 2005 1:16 pm

guamrsx wrote:I didn't realize that it was that short, I will take another one on my way to work and submit it and see. I have no one here on the island of Guam that can tune, this is why I want to make sure everything is ok. Once I get back to the states then I will have it tuned. Thanks

lol, yeah, it was like 20 secs long and only had you up to about 13mph.

as far as wanting to know how hot the engine is...your kpro will let you know. only gauges I would even bother with are EGT, Boost, and Fuel pressure...that's all you need. Take that a/f gauge out and sell it. You can use kpro for the a/f ratio

So the car is running good? If so, I'd just take it easy till you get it tuned if you feel worried about anything.

Also, I'd put lean protection on and change it to 12.8 and 2psi...so that way it will keep you from running to far lean...just my .02.

Since installing my ground zero intake manifold I get cut a lot now for leaning out. I'm getting tuned asap tomorrow by good ol stoney at Velocity.

Where are you going to be at in the states?