IAC Overhaul?

Hozer 88GTConv · 11-08-2002, 12:22 PM

I am asking b/c I am sick of my idle hanging around 1300 rpm
I have replaced/checked tps .98 vdc to 4.5 wot
and have disassembled the IAC, cleaned the carbon out and lubricated the plunger to allow free movement with a little PB.
I also have the FMS IAB manual adjustment plate and had it running/idling fine until recently.
Now the RPM hangs up at idle after warmup.
New 02's too so that's not it.
I have cleaned the TB too to alleviate any sticky plate issues.
I guess I just have to break down and get a new IAB.
Anybody had anything similar?
Thanks in advance...

Agent_4573 · 11-08-2002, 01:25 PM

after going to a bigger throttle body and doing all my adjustments I can't get my idle below 1100-1200 rpm... I just said fugit and now it idles a little high.

11-08-2002, 12:22 PM	#1
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	IAC Overhaul? I am asking b/c I am sick of my idle hanging around 1300 rpm I have replaced/checked tps .98 vdc to 4.5 wot and have disassembled the IAC, cleaned the carbon out and lubricated the plunger to allow free movement with a little PB. I also have the FMS IAB manual adjustment plate and had it running/idling fine until recently. Now the RPM hangs up at idle after warmup. New 02's too so that's not it. I have cleaned the TB too to alleviate any sticky plate issues. I guess I just have to break down and get a new IAB. Anybody had anything similar? Thanks in advance... __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

11-08-2002, 01:25 PM	#2
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	after going to a bigger throttle body and doing all my adjustments I can't get my idle below 1100-1200 rpm... I just said fugit and now it idles a little high. __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com