Pulled codes need help please

[mat82284]

ive been having an idle problem right after i installed my tb and plenum and i put back on the stock on and it still idles the same thing. theres no intake leaks so thats not it. but my check engine light is on and i pulled the codes from autozone and here they are if someone could shed some light on what they mean and what needs to be replaced thanks. also i replaced my tps when i installed the new tb and plenum.

P0113 - Sensor 1 Circuit High input
P1506- Manf Cntrl Veh.Spd. Idle Speed Control Auxiliary inputs

[ROUSHGUY]

Originally Posted by mat82284

ive been having an idle problem right after i installed my tb and plenum and i put back on the stock on and it still idles the same thing. theres no intake leaks so thats not it. but my check engine light is on and i pulled the codes from autozone and here they are if someone could shed some light on what they mean and what needs to be replaced thanks. also i replaced my tps when i installed the new tb and plenum.

P0113 - Sensor 1 Circuit High input
P1506- Manf Cntrl Veh.Spd. Idle Speed Control Auxiliary inputs

Your Idle air Motor has gone south or the wiring is loose or disconneted check your connections first after that you need to change it out. jim

[mat82284]

whats it called exactly the idle air motor? or something else also where is it located on the car? a pic maybe? also i did the throttle cable mod to take up slack that couldnt cause it also i have the stock intake plenum on right now but not the tb its still the 70mm if it makes a difference but whats the air motor?

[ROUSHGUY]

Originally Posted by mat82284

whats it called exactly the idle air motor? or something else also where is it located on the car? a pic maybe? also i did the throttle cable mod to take up slack that couldnt cause it also i have the stock intake plenum on right now but not the tb its still the 70mm if it makes a difference but whats the air motor?

If you have the cable too tight the voltage from the tps could be too high. Yes that could create this malfunction. jim

[mat82284]

well the cable still has slack on it i can push it and it moves up and down easly so i think it has alot of extra slack. but if theres a sensor somewhere that could cause it then. but if its just the tps and the tb is all the way shut then its not the cable right? the tb it all the way closed. also the tps is set at .98 at idle

[mity2]

Check your PCV valve! mine was having idle issue, and changing IAC, TPS, re-torqueing everything didn't work. it kep turning on P1506

Turned out that rubber gramet on PCV valve was cracked, and was leaking there. seal it up, and ALL my idle issue along with P1506 went away

[mat82284]

Originally Posted by mity2

Check your PCV valve! mine was having idle issue, and changing IAC, TPS, re-torqueing everything didn't work. it kep turning on P1506

Turned out that rubber gramet on PCV valve was cracked, and was leaking there. seal it up, and ALL my idle issue along with P1506 went away

ok thanks for that info. but i just replace the iac today and it idles the same way. there is also this whistle sound coming from the valve too. it sounds like something between a buzz and a whistle. but it still idleing the same what else could it be how do i check the wires to see if there fine it might be electrical? also wheres the PCV valve ill check that? anyone have a pic

[mat82284]

ok i found the pcv valve on the passenger side i taped it all up and i also taped up some of the hoses. it still idles high same way. heres exatly what happends



So here are what itsdoing.

1-when i start the car cold, it'll idle at around +1200RPM, and come down to about +800RPM as engine worms up(this is normal). as soon as you starts to drive around, it will not idle at 800RPM. But idle at +1000RPM. and stay there until i shut off the car again, and starts it back up. then it'll idle again at +800RPM, and repeats what i'v just discribed.

2-when i'm idleing at either +800RPM or +1000RPM, if I turn A/C on, then idle will come down to about +750RPM(this is also normal)

3-Either with or W/O A/C on, and regardless of idle RPM, if i brip the gaspedal in neutral, it'll stop at around +1600RPM. It'' raise RPM with this sound of air serging(I guess). and hang there for about 2~3 sec, and then comes back down to what ever the RPM was previoulsy(either 800RPM or 1000RPM. If i only give the gas until about 1100RPM, and let it go, it'll continue to rise its RPM until 1600RPM on its own. This suck azz, because....

5-Appearently, this serge of Idle is going on even when I'm driving around in any gear. Infact, i can drive around in 5th gear(or any gear for that matter) at around 1200RPM without touching gas pedal. its like having crouise control on.

6-While I'm driving around at any speed, and i disengage clutch, RPM will stay at 1400RPM. infact if i'm coasting down to stop in neutral from any speed(25mph ot 65mph), it'll stay at 1600RPM until i come to complete stop. then once i'm at complete stop, it'll stay a 1600RPM for about second, and then come back down to 1000RPM(Or 750RPM if I have A/C on.

7-While i do number 5 above, sometimes RPM will fractuate up and down between 1600RPM and 1000RPM. wen its dropping RPM from 1600RPM, it'll make sort of gerggle sound - and as soon as it hit 1000RPM, then it'll shoots back up to 1600RPM, then starts to come down, to about 1000RPM with sound and repeates itself.

what else could i try to fix this i taped up the hoses from the iac to the pcv so it has extra protection but still same thing what else should i try? i bought a new iac today and installed it drove arround for about 20 miles didnt feel any difference except the idle got a lil higher so i took it off put back on my stock on again and am about to take it back. i also reset the pcm. is there somethin i missed anything else i can try?

[440a]

Sounds like an electrical problem...
Could be;
Throttle Position Sensor
Mass Airflow Sensor

[mat82284]

i also replaced the tps. as for the mass air i havnt done that is there a way to test it?

[mat82284]

update i took the harness off of the mass air sensor and it tried to die for like 2 seconds then idles back to 1000rpm does this mean its a bad mass air or good?

i also took the harness off of the tps and the iac and it still idled at 1000 does this mean somethings bad or does it mean i have a leak or restriction somewhere?

[mat82284]

hay thanks all for the help. when i put my stock plenum back on i left my 70mm tb on and it stilled idled the same when i removed it and put stock back on it idles normal now. how could a tb be bad? are there suck things as defective tb's? i have a ford racing 70mm tb and i installed it like 4 times just to tripple check. why is the tb causeing my car to act wierd? does this mean i need a computer update before i can install another one?

[mat82284]

ok just wanted to let you know you guys know that it actally was the tb its self what happend is the circle plate in the middle wasnt adjusted right it was a lil off which cause it to stay open, i adjusted the plate and it works perfect now so if anyone else has this problem thats somthin you can check other than the tps.

[Roush2960]

Thanks for the info and update.

Matt