Tps/iac 86 L98
Thread Starter
Melting Slicks
Joined: Aug 2006
Posts: 2,191
Likes: 243
From: Guelph Ontario
Tps/iac 86 L98
hey guys---need your help again. Read a paper on internet from one Lars Grimsrud on www.batee.com Good article on setting up your TPI and IAC. I know it is probably on this site somewhere--but I did search and could not find. He says to set your idle up with in drive against the brake at 450 RPM---seems low to me. After setting my TPI up to .540 VDC---my idle is lower at 500 RPM but it seems to be too low--mind you it is running extremely well. 1986 C4 Coupe L98--High energy Comp Cam--just rebuilt. I have also broken (brittle) vaccuum line between the fuel regulator and the AIR valves up front---do I need the vaccuum line re hooked up to these AIR valves??? I have just blocked it off from the fuel regulator for now. Where do I get these small plastic lines (especially the two into one splitter??) thanx guys---alway apprieciate you guys!!!
WildWilly
WildWilly
Safety Car
Joined: Sep 2003
Posts: 3,599
Likes: 24
From: Orange County NY
St. Jude Donor '10-'11-'12-'13
450 rpm is the base idle, with the IAC harness disconnected. The engine should idle at whatever the target idle is programmed to in the chip (stock or custom?).
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
I agree with byebyeL98. Those vac lines can be found at Napa. You can also replace those plastic lines with rubber lines. I would have it fixed, so not to worry about it causing problems with leaks.
When setting my minimal idle (IAC extended and disconnected), my engine sound like it was going to die. Once the IAC is reconnnected, the ECM will use it to get the desired idle in the chip.
When setting my minimal idle (IAC extended and disconnected), my engine sound like it was going to die. Once the IAC is reconnnected, the ECM will use it to get the desired idle in the chip.
Thread Starter
Melting Slicks
Joined: Aug 2006
Posts: 2,191
Likes: 243
From: Guelph Ontario
Hey Guys---thanx for the info---just cruised up to Sauble Beach, Ontario---she ran like a dream---went to NAPA and purchased some small rubber hose --reattached all the vaccuum stuff---set the TPS with my volt meter---running TOP DRAWER!!!
Thanx
Thanx
