I have been having problems with my car when Im driving it when its cold, and when it has been driving, warmed up, then started again. The car works fine when I depress the throttle but when I let off, its like the throttle snaps shut. but the throttle is still oppen. Its really jerky and getting kind of anoyiing. The car has a ported t body and has hondata, but I didn't do it before. Could it have something to do with the some sort of load sensor? No idea. No codes though. Anyone have any idea? How much does a tps sensor cost? Thanks for your time.

 

look at your fast idle valve. i had snappy throttle response, which then developed into a hunting idle. turns out my fast idle valve had come apart internally. it's very simple mechanically and once you get the cover off, it's easy to see how to get it back together.

 

Thanks I'll take a look. Anyone else have an idea?

 

Its really violent now. Can't seem to find the problem. Anyone else have an idea?

 

check voltage at the tps .45 and 5volts
If it would be the eld you would be throwing a code

 

Have you checked the range of motion for the TB plate, if it is binding up it could cause that symtom you decribed, also make sure the throttle cable is not binding up, older cables like older woman may lack the proper lube and not work properly...
I see your indiginous to my area, if you need a hand trouble shooting one day just get at me...

 

There was a service bulletin a while back on your car I beleive (96 civic right?)
The throttle cable was beginning to fray and bind up inside the sheild. Does this sound like what you are experienceing? Can you feelit in the pedal itself being tight and "snapping" back when you get off the throttle?

 

There is nothing wrong with the cable. I checked that and the plate should be fine. I think it has something to do with load. The throttle and pressure from the gas peddle feel fine. I think it's something electrical. It started doing it when I changed my ecu to hondata. It worked fine before except it would do the same thing when I reset the computer when the car was hot. It doesn't always do it now either. Only when the car is hot and I turn it back on again. What sensor would make it do this? I think it has something to do with load though. Less than aproxamatly 30% throttle with out acceleration makes the engine act as if the throttle is snapping shut or fuel is being cut off for idle. But thanks for those ideas.

 

Ouch, sounds like fun troubleshooting... that is beyond my expertise, try to be more accurate when troubleshooting the symtoms. The easiest finger to point is the TPS sensor, but try using process if elimation if possible, try to use a different ecu just to confirm it is not the ecu.

 

Thanks I'll give that a whirl to see if thats better

 

I had the same problem I think it was my Hondata. When you get on the throttle does it sometimes take a half second before it starts accelerating? I say think because it has gone away and all I did was got a new chip burnt for the hondata. It was very irregular it might still be there but it hasn't happened yet. Check all your connections from the box to the ECU. Let me know what happens I'd really like to know.

 

Bump cuz my problem is back again.

 

I had hunting idle problem

I cleaned the eacv set the tps and it still happens some times but when the car is warming up but I think it stops when the car is fully warmed up.

 

I have this same problem with my b18c transplant. I've read a bunch of threads with the same symtoms (many like mine are from fresh rebiulds) but no solutions. If anyone knows how to fix this please let us know. Oh yeah, and I don't have hondata yet. Stock P72. I was hoping hondata would help me fix this problem

 

BUMP

 

I had my car dataloged today and I found out that I had a problem with my knock sensor. I burned a new chip and modified the fuel a little. The car worked great driving home, so I turned it off again because it always does it when the car has been warmed up and then turned off and It did it again. Soon as the car isn't accellerating, the car feels like someone is just stopping the fuel.... Is there a load sensor on an obd2 car? Feels like it might not be calibrated. I didn't see it on my list of datalogged sensors. Still up for any ideas...

 

Could be that your throttle tip in parameters on the Hondata are not set correctly. We have experienced this with quit a few basemaps, even ones that have been heavily massaged by other "tuners". Seems that a lot of customers are being told by some tuners that this is normal with hondata. Not so, seems that a lot of guys seem to forget these parameters of the part throttle tuning and just send the car out the door thinking it is normal for hondata.

If this is, in fact, an ECU tuning issue, and not an engine component or driveability issue (for sure), it can be tuned out by just playing with the tuning some more or a lot more. Part throttle tuning can be the hardest part of the tuning process due to so many variables.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondatim &raquo;</TD></TR><TR><TD CLASS="quote"> Part throttle tuning can be the hardest part of the tuning process due to so many variables.

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Werd, I have about 15 hours logged on my car, but it runs like stock.

 

jligutti dosen't have hondata and he says that he has the problem too. I'm sure now that turbod96ex is having is the same problem i'm having.

 

Like I said earlier, may be Hondata tuning issue, may be issue with something else. Hard to diagnose car without really being able to witness what the vehicle is doing. Know what I mean?

 

I hear you. Thanks for the input. That was really helpful. I will be doing some more tuning when I finnish building my motor this week. Thanks again for all of your help everyone.