IAC BAD??? OR throttle body bad?

Rico-mofos · March 12th, 2008, 12:15 PM

So i put on a 75mm MAC throttle body and have had nothing but problems...it was sticking really bad and my idle would hang for way to long around 1500-2000 rpms....so i took it off cleaned my IAC...backed the throttle position screw off so it wouldnt stick...still sticks just not as bad...i even took the cruise control cable off....but now im throwing a code..p0507!! dont know if maybe my IAC sensor is just bad? should i get a new one? or if I should just junk the MAC and buy an accufab? i dont wanna take to a shop just for an idle problem but i cant figure this out ...please help

Rico-mofos · March 12th, 2008, 12:31 PM

??

Trick Tuners · March 12th, 2008, 12:45 PM

It sounds like too much air is getting past the TB blade. Try backing out the stop screw a bit. One way to get close is to back out the screw until it does not touch the TB stop (just barley like the width of a piece of paper) then put 1.5 turns in.

Rico-mofos · March 12th, 2008, 12:51 PM

thanks alot man im going to try that...im starting to think that my problem is just a basic sticky throttle body issue and by trying to correct it ...i made it worse...i spoke to Seth at Brenspeed and he told me to try the same thing you said...if that doesnt help put the old throttle body back on to see if i still get a code...if i dont get a code...im sending it back for a bbk...

Rico-mofos · March 12th, 2008, 01:05 PM

could i port and polish my stock throttle body myself?

SteviGX · March 12th, 2008, 01:12 PM

have you tried some throttle body and intake cleaner?

It may just have some gunk keeping it from coming free, if the other guys thing does't work. worth a shot

Rico-mofos · March 12th, 2008, 01:37 PM

yeah i did that already....still sticking and still have a high idle...so i think i just got a bad throttle body....i hope the gaskets are still good after taking it off three times now...

CobraR · March 12th, 2008, 01:46 PM

same thing happened to me. has something to do with the throttle cable and the idle control unfortunately i cant tell you what exactly to do cuz i was just playing around with it and it fixed itself

Rico-mofos · March 12th, 2008, 01:49 PM

my cable has a lil slack but thats how it was before i put it on...

Rico-mofos · March 12th, 2008, 03:21 PM

well now i just fucked myself...the dam screw that attaches the IAC stripped!! dam brass screw ftl!!

Trick Tuners · March 12th, 2008, 07:32 PM

Originally Posted by Rico-mofos

well now i just fucked myself...the dam screw that attaches the IAC stripped!! dam brass screw ftl!!

Use vice grips on it. (those screws suck!) Do not port it yourself (or port it at all). It will allow too much air past the TB blade and you will end up with an un-fixable high idle.

March 12th, 2008, 12:15 PM	#1
Rico-mofos Hardcore Enthusiast 2008 Bullitt #890 slow Join Date: Jan 2008 Location: Chicago Posts: 1,594 iTrader: 0 reviews	IAC BAD??? OR throttle body bad? So i put on a 75mm MAC throttle body and have had nothing but problems...it was sticking really bad and my idle would hang for way to long around 1500-2000 rpms....so i took it off cleaned my IAC...backed the throttle position screw off so it wouldnt stick...still sticks just not as bad...i even took the cruise control cable off....but now im throwing a code..p0507!! dont know if maybe my IAC sensor is just bad? should i get a new one? or if I should just junk the MAC and buy an accufab? i dont wanna take to a shop just for an idle problem but i cant figure this out ...please help __________________ BULLITT CREW #5 LT GTB mufflers for sale

March 12th, 2008, 12:31 PM	#2
Rico-mofos Hardcore Enthusiast 2008 Bullitt #890 slow Join Date: Jan 2008 Location: Chicago Posts: 1,594 iTrader: 0 reviews	?? __________________ BULLITT CREW #5 LT GTB mufflers for sale

March 12th, 2008, 12:45 PM	#3
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,471 iTrader: 3 reviews	It sounds like too much air is getting past the TB blade. Try backing out the stop screw a bit. One way to get close is to back out the screw until it does not touch the TB stop (just barley like the width of a piece of paper) then put 1.5 turns in. __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

March 12th, 2008, 12:51 PM	#4
Rico-mofos Hardcore Enthusiast 2008 Bullitt #890 slow Join Date: Jan 2008 Location: Chicago Posts: 1,594 iTrader: 0 reviews	thanks alot man im going to try that...im starting to think that my problem is just a basic sticky throttle body issue and by trying to correct it ...i made it worse...i spoke to Seth at Brenspeed and he told me to try the same thing you said...if that doesnt help put the old throttle body back on to see if i still get a code...if i dont get a code...im sending it back for a bbk... __________________ BULLITT CREW #5 LT GTB mufflers for sale

March 12th, 2008, 01:05 PM	#5
Rico-mofos Hardcore Enthusiast 2008 Bullitt #890 slow Join Date: Jan 2008 Location: Chicago Posts: 1,594 iTrader: 0 reviews	could i port and polish my stock throttle body myself? __________________ BULLITT CREW #5 LT GTB mufflers for sale

March 12th, 2008, 01:12 PM	#6
SteviGX Hardcore Enthusiast 2002 Mustang GT 13.538@101.72 before cams&slicks&gears Join Date: May 2007 Location: Indianapolis Posts: 1,545 iTrader: 2 reviews	have you tried some throttle body and intake cleaner? It may just have some gunk keeping it from coming free, if the other guys thing does't work. worth a shot __________________ Mineral Gray Club Member #2 Just your average 22 year old dumbass If you didn't build your car, and your bragging about it, STFU

March 12th, 2008, 01:37 PM	#7
Rico-mofos Hardcore Enthusiast 2008 Bullitt #890 slow Join Date: Jan 2008 Location: Chicago Posts: 1,594 iTrader: 0 reviews	yeah i did that already....still sticking and still have a high idle...so i think i just got a bad throttle body....i hope the gaskets are still good after taking it off three times now... __________________ BULLITT CREW #5 LT GTB mufflers for sale

March 12th, 2008, 01:49 PM	#9
Rico-mofos Hardcore Enthusiast 2008 Bullitt #890 slow Join Date: Jan 2008 Location: Chicago Posts: 1,594 iTrader: 0 reviews	my cable has a lil slack but thats how it was before i put it on... __________________ BULLITT CREW #5 LT GTB mufflers for sale

March 12th, 2008, 03:21 PM	#10
Rico-mofos Hardcore Enthusiast 2008 Bullitt #890 slow Join Date: Jan 2008 Location: Chicago Posts: 1,594 iTrader: 0 reviews	well now i just fucked myself...the dam screw that attaches the IAC stripped!! dam brass screw ftl!! __________________ BULLITT CREW #5 LT GTB mufflers for sale

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