Map FAST Intake Fix and Install Help.
Thread Starter
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
Map FAST Intake Fix and Install Help.
Ok so using the install from LS1HowTo.com I VERY EASILY got the old intake out. This is a 30 minute job for someone who knows what they are doing. I ordered the map relocation kit from Lingenfelter because I heard it helps eliviate some of the idling problems the FAST faces.
So I started thinking about the design of the FAST versus stock, since the MAP LOCATION is the same for both of them, but the factory uses a "clip" to hold the MAP sensor in place so it doesn't wobble around and "leak". Then it got me thinking about why relocating the MAP to the front would help an idling issue and I figure it doesn't, it merely seals it properly and therefore "fixes" the problem, so I decided to fix the problem another way. I rapped the rubber gromet on the MAP sensor with a crap load of teflon tape and got it to seal "way tighter" than it did from the factory. I'll report my findings when I get everything back together.
Anyone have any other reasons as to why relocating the MAP helps idling issues?
So I started thinking about the design of the FAST versus stock, since the MAP LOCATION is the same for both of them, but the factory uses a "clip" to hold the MAP sensor in place so it doesn't wobble around and "leak". Then it got me thinking about why relocating the MAP to the front would help an idling issue and I figure it doesn't, it merely seals it properly and therefore "fixes" the problem, so I decided to fix the problem another way. I rapped the rubber gromet on the MAP sensor with a crap load of teflon tape and got it to seal "way tighter" than it did from the factory. I'll report my findings when I get everything back together.
Anyone have any other reasons as to why relocating the MAP helps idling issues?
Le Mans Master
Joined: Dec 2003
Posts: 5,047
Likes: 252
From: San Diego
Go to Lowes or Homedepot and get a 1/4 barb by 1/4 MIP fitting drill the MAP sensor hole out alittle bigger and screw that fitting in and then hook up a piece of 1/4 vaccum hose up and call it a day. I wish I had pictures of mine easy fix.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Yes, I found it contacts the firewall back there and relocated mine to the side. Its ugly but it worked and I have no issues.
Link to my install thread
Link to my install thread
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
Mine hit the firewall as well--I used silicone and sealed it up real tight and made a trough and filled up a big area of silicone making it almost soild all the way accross the top--also had to cut about a 1" square hole in the firewall to clearance it -then i covered the hole with heat reflective tape and left it loose in the middle for room --works fine--no hot air coming into the drivers compartment--no vacuum leaks--I'm sure it would have been cleaner to move it--but oh well--
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
OK so using the install from Suharto.com I VERY EASILY got the old intake out. This is a 30 minute job for someone who knows what they are doing. I ordered the map relocation kit from Lingenfelter because I heard it helps alleviate some of the idling problems the FAST faces.
So I started thinking about the design of the FAST versus stock, since the MAP LOCATION is the same for both of them, but the factory uses a "clip" to hold the MAP sensor in place so it doesn't wobble around and "leak". Then it got me thinking about why relocating the MAP to the front would help an idling issue and I figure it doesn't, it merely seals it properly and therefore "fixes" the problem, so I decided to fix the problem another way. I rapped the rubber grommet on the MAP sensor with a crap load of teflon tape and got it to seal "way tighter" than it did from the factory. I'll report my findings when I get everything back together.
Anyone have any other reasons as to why relocating the MAP helps idling issues?
So I started thinking about the design of the FAST versus stock, since the MAP LOCATION is the same for both of them, but the factory uses a "clip" to hold the MAP sensor in place so it doesn't wobble around and "leak". Then it got me thinking about why relocating the MAP to the front would help an idling issue and I figure it doesn't, it merely seals it properly and therefore "fixes" the problem, so I decided to fix the problem another way. I rapped the rubber grommet on the MAP sensor with a crap load of teflon tape and got it to seal "way tighter" than it did from the factory. I'll report my findings when I get everything back together.
Anyone have any other reasons as to why relocating the MAP helps idling issues?
How does the LPE adapter work?
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
The sensor sits higher on a FAST manifold, than the stock one. This reduces clearance between sensor, and cowl, sometimes resulting in a broken sensor, and often, a vacuum leak. I installed the Lingenfelter relocate kit, and it does not improve idleing at all.
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Thread Starter
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
I re-routed mine with fuel hose and a 1/4 lowes adapter. I have Zero idle issues. Zeevette I think you have a vacuum leak coming from under the intake. My car idled insane when I had that vacuum leak. I would rip down the car again and re-install everything carefully, exactly according to the instructions. STOP blaming it on the throttlebody as this was also the advice given to me. I don't believe this intakes idle problems have anything to do with the throttlebody. Mine idles DEAD STEADY at 800 rpm, see my post in scan tune, it has a link posted to my C5 gen. post. I have an idle video posted with a 90/90 TPIS no less and with no tune have ZERO idle issues.
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
I re-routed mine with fuel hose and a 1/4 lowes adapter. I have Zero idle issues. Zeevette I think you have a vacuum leak coming from under the intake. My car idled insane when I had that vacuum leak. I would rip down the car again and re-install everything carefully, exactly according to the instructions. STOP blaming it on the throttlebody as this was also the advice given to me. I don't believe this intakes idle problems have anything to do with the throttlebody. Mine idles DEAD STEADY at 800 rpm, see my post in scan tune, it has a link posted to my C5 gen. post. I have an idle video posted with a 90/90 TPIS no less and with no tune have ZERO idle issues.
My idle issues are pretty minor, and nothing to do with the TB, and everything to do with tuning. Mine idles steady @825 rpms, but will hang up sometimes at 1k-1300 for a few seconds when I take my foot off the gas, but it always eventually goes back to 825. If I had a leak, it'd stay high, I would think.
Thread Starter
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
My idle issues are pretty minor, and nothing to do with the TB, and everything to do with tuning. Mine idles steady @825 rpms, but will hang up sometimes at 1k-1300 for a few seconds when I take my foot off the gas, but it always eventually goes back to 825. If I had a leak, it'd stay high, I would think.
