Guys i just finished installing my turbo and have had it running since friday night. she seems to run really well on the basemap. everything except my idle problem. it seems if i start up the car and drive off without it warming up, and i come to a stop it'll hold the rpms at 2k. after it warms up it seems to bounce between 1100 and 1500. sometimes a smaller gap but around there. maybe about 20-30% of the time i come to a stop it will find an idle at 800 at idle normal. but the rest of the time it seems to bounce between 1100-1300 or 1200-1500 around that area.

i didn't have enough for a vacuum manifold yet( i know i know 30 bucks right. im broke ok lol) so my bov is running directly off my cruise control line(i dont' hav cc). my boost gauge is T'd into my fpr line and my internal wastegate is T'd into my evap solenoid line. i checked all my vac lines everything is on fine.

a friend suggested disconnecting the evap line to the im and in my case connecting the wastegate directly to the manifold. he said pulling off the evap smoothed out his idle alot. i tried it at lunch with no effect. car acts the same.

my setup:
y7/y8 mini-me
td04l-13g
homemade ramhorn
2.5" charge pipes
jrc 5" fmic
1g dsm bov
2.5" open dp
dsm 450's
p28 running uberdata basemap

do you guys have any ideas?

thanks!

-Luke

 

adjust your idle. let me know if you dont know how

 

What is your idle set at in Uberdata?

Have you tried adjusting your throttle cable?

 

using the idle screw?

before i installed the turbo and was just running with the y7/y8 mini-me i accidentally had the tps sensor fully 'advanced' and it was sorta acting the same. i then 'retarded' the sensor as much as possible and then everything was running fine. but it had a low idle of like 500 so i turned the idle screw. and i've left it all like that. i wish i had a datalogging cable right now to see what my tps is putting out. but i mean the car was idlling fine before.

btw is my y8 tps the only one that isn't riveted on? it seems like everyone else i ask its riveted to the TB

what on the throttle cable would need adjusting? i haven't changed that since the mini-me

im riding on a basemap that was made by very reputable local tuners. i dont have anyway to read the chip but i can check with them. this is the second basemap i've had in there. the first was done by a friend but was too rich/retarded. the idle acted the same way( alil worse on his) and in his bin the idle's were set at:
cold: 850
warm: 750
moving: 920

 

yeah just try resetting your idle. i had to readjust mine when i put the turbo on.

 

i don't think the idle screw would cause the bouncing. only a too high/too low idle. the tps tho might be a culprit but i mean it worked like this before. i'll have to play with some things. if you guys think of anything please let me know

 

check your AFRs. when i ran a lean idle, my tach would be lopey. just like tuning a gas powered RC car - leaning the low-end fuel mixture would cause a higher idle.

 

ya i sorta suspect the basemap. i don't have a wideband. just a narrow. when the idle bounces around it sweeps from lean to rich insync with the rpm's. but i thought it was hitting rich at the hhigher end. i will check it again today when i mess with it some

 

also check your fuel pressure

 

yah i've been meaning to get a fuel pressure guage. i wanted to get one in before the turbo to see what MY stock setting was but i never got the chance

 

hmm well i 'advanced' my tps sensor all the way and it seems to be doing much better. idle's most of the time. still sometimes the rpm's move around but not as rapidly and not as high. moves slowly from say 900 to 1100 or a lil more. also sometimes it decides to idle way low at 500. other times idles perfect. but overall i'd say its much better then it was before.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lkailburn &raquo;</TD></TR><TR><TD CLASS="quote">hmm well i 'advanced' my tps sensor all the way and it seems to be doing much better. idle's most of the time. still sometimes the rpm's move around but not as rapidly and not as high. moves slowly from say 900 to 1100 or a lil more. also sometimes it decides to idle way low at 500. other times idles perfect. but overall i'd say its much better then it was before. </TD></TR></TABLE>

you can't just adjust your tps sensor without looking at the voltage output and closed and completely open throttle...
this is something you definately should take care of

 

yeah, when adjusting the TPS, you have to measure the voltage at idle and WOT. the procedures are the Haynes manual.

 

i got 4.5 and .5 just like it said in the ecu sticky thread here. only thing funny is i read 4.5 at closed and .5 WOT. maybe i was reading off the wrong wire or something lol

 

You need a tune, I had the same problem, my timing is off. Had it tuned and timing fixed, and all is well. Good Luck.

 

yah i still suspect the basemap as being the primary culprit. i'm taking it dyno tuning as soon as i have enough, a few weeks time.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lkailburn &raquo;</TD></TR><TR><TD CLASS="quote">i got 4.5 and .5 just like it said in the ecu sticky thread here. only thing funny is i read 4.5 at closed and .5 WOT. maybe i was reading off the wrong wire or something lol
</TD></TR></TABLE>

almost sounds like your wires are switched. I don't know much about the y7/y8 deal but when i did a MPFI conversion on a friends car i had to swap the tps wires around. OR maybe you just measured the wrong wires =P

 

when i did the swap i had to extend the harness plug. but when i was testing i made sure i didn't accidentally connect the wrong wires. its a 3 wire harness. yellow/blue, red/black and green/black. i know the red/black is the one that goes to the ecu so i was testing red/black with one of the others. on one i didn't get any readings at all and testing across the other i was getting those readouts. hopefully i'll get a datalogging cable soon. that'd make it easy to verify

 

I'm pretty sure your problem lies there. (TPS)

 

i appreciate all the help guys! good to see theres still good hearted members on HT lol

i'll post up the results when everything is cured

 

we have become a rare breed everyone else likes to think they are wiser and know-it-all just because they've been on the boards longer and they tend to bash on people who ask for help on things they probably never experienced before. personally I like offering suggestions. It hones my knowledge and test my skills. blah blah blah.. good luck

 

have you guys datalogged your TPS before? im not sure if i was getting the correct readouts. it was reading 16 for tps at idle. the number would increase as i gave it gas but how do i know what the tps should read in uberdata datalogging.
thanks

 

my TPS datalog with the Zeitronix is only in percent% (0-100)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lkailburn &raquo;</TD></TR><TR><TD CLASS="quote">have you guys datalogged your TPS before? im not sure if i was getting the correct readouts. it was reading 16 for tps at idle. the number would increase as i gave it gas but how do i know what the tps should read in uberdata datalogging.
thanks</TD></TR></TABLE>

so basically you're tps is reading 16% with the closed throttle... which is bad

 

yeah.. so just adjust the tps so it reads 0 at idle