Hey all. I installed my toda spec b cams, springs, retainers, timming belt and gears in my "R" with no problems untill I tride to run the car. I did a valve adjustment and checked the timming, but I can't get a solid idle out of it. When its cold it goes back and forth between 1500 and 800 and when its worm it jumps around between 750 and 950. The car feels strong but I am also getting some black stuff from the exhaust like its running real rich. Sometimes after I drive it for a while I will notice that it sounds like I am getting some detonating but I can hear it all the time. Also, I can get the idle when its cold to stop jumping so much by adjusting the Idle air adjustment screw but when I do that the car will stall when its worm. For fuel tuning I use an apex-i VAFC. I have tried hrs. of fuel tunning to get a good idle but nothing seems to help. Any ideas to get this thing running better?

 

An idle fluctuation like you described is usually due to a vacuum leak. Odd that is would pop up now as you haven't touched either the tb or intake mani., but try spraying some carb cleaner around the intake manifold gasket area and the tb gasket area. Also check for loose or damaged vacuum hoses.

 

Alright here is an update
I was playing around with it and found the the car idles and runs like it should when I have the TPS sensor unpluged. Its only when I plug it in when the car starts to jump around in idle and starts to get real rich. When I have the TPS sensor pluged in the volt is at .475 on the VAFC. Any clue as to what to do next.

 

The map sensor and the tps sensors have the same plug. Sometimes people mix these plugs up and it screws with theyre idle. Make sure you have them connected to the correct sensors.

 

Update

I ended up changing out the ECU and cold start and idle is perfect. The only other problem that I am having now is that the ECU keeps tripping a CEL with 71, 72, 73 and 74 which I found out to be random detonation in cylinders 1, 2, 3 and 4. With that said, any ideas on what to do next.

 

What's timing at? Also try adding a touch more fuel.

 

What ae you using to tune it with?? Add more fuel your detontation should go away.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RedlinedVTEC &raquo;</TD></TR><TR><TD CLASS="quote">What's timing at? Also try adding a touch more fuel. </TD></TR></TABLE>

timming is at stock (16 BTDC)

going to try adding some fuel to see if that helps

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fasterb16hondasi &raquo;</TD></TR><TR><TD CLASS="quote">What ae you using to tune it with?? Add more fuel your detontation should go away.</TD></TR></TABLE>

Its not detonation. Its crankshaft fluctuation due to the rough idle and it
wont go away. your problem is because those cams idle on low vacuum
and the ecu is putting too much fuel as a result. AFC helps, but thats
how its gonna be with those cams. get used to it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fasterb16hondasi &raquo;</TD></TR><TR><TD CLASS="quote">What ae you using to tune it with?? Add more fuel your detontation should go away.</TD></TR></TABLE>

I am using Apex-i VAFC

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sgT &raquo;</TD></TR><TR><TD CLASS="quote">

Its not detonation. Its crankshaft fluctuation due to the rough idle and it
wont go away. your problem is because those cams idle on low vacuum
and the ecu is putting too much fuel as a result. AFC helps, but thats
how its gonna be with those cams. get used to it</TD></TR></TABLE>


So, with that in mind I need to try and lean it out at idle more.