IAC valve

duckle1 · 03-08-2008, 06:55 AM

Does anybody know how to test the idle air control valve to see if it is working properly?

mudseeker · 03-08-2008, 11:34 AM

it's easy with a scan tool, but since most people can not afford the luxery of one of those, i will have to look up the hard way when i get off work tonight.

shoot me a Private Message around 11pm if no one else chimes in with the answer.

crabtruck · 03-08-2008, 03:19 PM

With it unplugged, you could check to see that each of the two coils
has about 40-80 ohms (A to B and C to D)
What makes you suspect the IAC ? Something like high idle could be
caused by a dirty crankcase valve or other easy stuff.
Which engine is this ?
Maybe this link is helpful:
http://www.autozone.com/servlet/UiBr...3d8018b998.jsp

436'd skylark · 03-08-2008, 05:17 PM

Quote:

Originally Posted by duckle1

Does anybody know how to test the idle air control valve to see if it is working properly?

year make model?

all sorts of IAC valves have rolled off the lines.

duckle1 · 03-08-2008, 06:43 PM

this is a 4.8 v8 fuel injection, 365,000 miles, the iac valve is just one of the things im investigating to figure out my idle problem,

duckle1 · 03-08-2008, 07:17 PM

Quote:

Originally Posted by crabtruck

With it unplugged, you could check to see that each of the two coils
has about 40-80 ohms (A to B and C to D)
What makes you suspect the IAC ? Something like high idle could be
caused by a dirty crankcase valve or other easy stuff.
Which engine is this ?
Maybe this link is helpful:
http://www.autozone.com/servlet/UiBr...3d8018b998.jsp

thanks for the link...my truck will not communicate with a scanner,and I have dumped too much money in it as it is which is why im wondering if I can pull the egr valve off clean it and put it back on? I have replaced the tps,coolant temp sensor,put plugs wires ,changed the fuel filter,

duckle1 · 03-08-2008, 07:18 PM

Quote:

Originally Posted by crabtruck

With it unplugged, you could check to see that each of the two coils
has about 40-80 ohms (A to B and C to D)
What makes you suspect the IAC ? Something like high idle could be
caused by a dirty crankcase valve or other easy stuff.
Which engine is this ?
Maybe this link is helpful:
</title></head>"); newWindow.document.writeln("<body><div align='center'><img " + getWidth("yes") + "src='/images/cds/" + tpe + "/" + sze + "/" + pc + "." + tpe + "'></img></div>"); newWindow.document.writeln("<div align='center'><table><tr><td><FORM

thanks for the link...my truck will not communicate with a scanner,and I have dumped too much money in it as it is which is why im wondering if I can pull the egr valve off clean it and put it back on? I have replaced the tps,coolant temp sensor,put plugs wires ,changed the fuel filter,

duckle1 · 03-08-2008, 07:43 PM

Quote:

Originally Posted by mudseeker

it's easy with a scan tool, but since most people can not afford the luxery of one of those, i will have to look up the hard way when i get off work tonight.

shoot me a Private Message around 11pm if no one else chimes in with the answer.

even if autozone scans for free my truck will not communicate for some reason, so I have to guess. it Idles up and down in the mornings ,warms up and is fine, any ideas?

duckle1 · 03-08-2008, 07:44 PM

Quote:

Originally Posted by duckle1

thanks for the link...my truck will not communicate with a scanner,and I have dumped too much money in it as it is which is why im wondering if I can pull the egr valve off clean it and put it back on? I have replaced the tps,coolant temp sensor,put plugs wires ,changed the fuel filter,

I,m thinking EGR valve But its 150.00 Im tired of putting $ into this truck Any Ideas?

duckle1 · 03-08-2008, 07:47 PM

Quote:

Originally Posted by crabtruck

With it unplugged, you could check to see that each of the two coils
has about 40-80 ohms (A to B and C to D)
What makes you suspect the IAC ? Something like high idle could be
caused by a dirty crankcase valve or other easy stuff.
Which engine is this ?
Maybe this link is helpful:
http://www.autozone.com/servlet/UiBr...3d8018b998.jsp

4.8 vortec

03-08-2008, 06:55 AM	#1
duckle1 Full Member Join Date: Feb 2008 Posts: 31	IAC valve Does anybody know how to test the idle air control valve to see if it is working properly?

03-08-2008, 11:34 AM	#2
mudseeker Moderator Join Date: Feb 2006 Location: michigan Posts: 3,934	it's easy with a scan tool, but since most people can not afford the luxery of one of those, i will have to look up the hard way when i get off work tonight. shoot me a Private Message around 11pm if no one else chimes in with the answer. __________________ member map add yourself

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
ipr valve 2000 f250 sd	colocat	Ford Truck Forum	2	03-02-2008 12:57 PM
EGR valve	skully	Chevy Truck Forum	2	11-09-2007 08:22 PM
burned valve?	jktuck	Chevy Truck Forum	8	10-12-2007 12:59 PM
94 Blazer Egr Valve 4.3	Hayden	Chevy Truck Forum	1	12-17-2006 03:38 AM
EGR Valve 89 K2500	skidxr	Chevy Truck Forum	3	03-25-2006 09:40 PM

03-08-2008, 03:19 PM	#3
crabtruck Senior Member Join Date: Jul 2007 Posts: 1,464	With it unplugged, you could check to see that each of the two coils has about 40-80 ohms (A to B and C to D) What makes you suspect the IAC ? Something like high idle could be caused by a dirty crankcase valve or other easy stuff. Which engine is this ? Maybe this link is helpful: http://www.autozone.com/servlet/UiBr...3d8018b998.jsp

03-08-2008, 06:43 PM	#5
duckle1 Full Member Join Date: Feb 2008 Posts: 31	this is a 4.8 v8 fuel injection, 365,000 miles, the iac valve is just one of the things im investigating to figure out my idle problem,