IAC or EGR Valve?... - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

MAC · 03-14-2011, 09:01 PM

87 5.7L V8 camaro:

Just wondering which itd be per the issues I'm having...any help is appreciated!, I believe it to be the IAC but friend says it's the EGR.

problems: rare, but occasional rough idle at stop lights. (idle fluctuates)
car dies when switching from Drive to Reverse (completely dies, have to redraft car afterward)
idle while in reverse is VERY rough. (car vibrates hard)

yesterday the idle was at about 1k rpm after a 1 hour drive..normally it's about 6-700 when the engine is warmed up/been driven.

Capthowdy · 03-14-2011, 09:14 PM

Check for vac leaks also...poss carbon fouling of egr...it gets stuck and holds egr open and then blows through..they have gaskets with screens to help stop the carbon fouling

Capthowdy · 03-14-2011, 09:16 PM

the harsh vib can be caused by mounts and the torque rod bushins on the drivshaft...

03-14-2011, 09:01 PM	#1
MAC Iroc-Z <3'r Drives: '87 5.7L Iroc-Z Join Date: May 2008 Location: Modesto, CA Posts: 392	IAC or EGR Valve?... 87 5.7L V8 camaro: Just wondering which itd be per the issues I'm having...any help is appreciated!, I believe it to be the IAC but friend says it's the EGR. problems: rare, but occasional rough idle at stop lights. (idle fluctuates) car dies when switching from Drive to Reverse (completely dies, have to redraft car afterward) idle while in reverse is VERY rough. (car vibrates hard) yesterday the idle was at about 1k rpm after a 1 hour drive..normally it's about 6-700 when the engine is warmed up/been driven. __________________ "Camaro Z/28 is back. Gentlemen, Don't even bother to start your engines."

03-14-2011, 09:14 PM	#2
Capthowdy Drives: 2010 2SS RS IOM Join Date: Jun 2010 Location: Fort Lauderdale Fl Posts: 1,048	Check for vac leaks also...poss carbon fouling of egr...it gets stuck and holds egr open and then blows through..they have gaskets with screens to help stop the carbon fouling __________________ THE "MENACE"

03-14-2011, 09:16 PM	#3
Capthowdy Drives: 2010 2SS RS IOM Join Date: Jun 2010 Location: Fort Lauderdale Fl Posts: 1,048	the harsh vib can be caused by mounts and the torque rod bushins on the drivshaft... __________________ THE "MENACE"

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