fwi intake issues - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 07-15-2011, 12:16 PM   #21
Senior Member
Posts like a 4 Banger
Thread Starter
 
swampthing's Avatar
 
Join Date: May 2008
Location: Homosassa, Florida (yes it says Homo)
Posts: 115
Thanks: 0
Thanked 0 Times in 0 Posts
swampthing is on a distinguished road
Default



Just drove it today for the first time on a few weeks(blew a tire and had to wait for cash to buy another one) and it must know im trying to figure it out cause its running perfect...I'm going to drive it to work today and see if its working right still.

Incidentally, if anyone has seen sawgunner tell him he owes me a pcm tray :-p
Attached Thumbnails
fwi intake issues-2011-07-15_10-09-00_952.jpg  
swampthing is offline   Reply With Quote
Old 07-15-2011, 12:43 PM   #22
Senior Member
True Car Nut
 
sawgunner's Avatar
 
Join Date: Jan 2009
Location: Dover, NH
Posts: 7,122
Thanks: 0
Thanked 0 Times in 0 Posts
sawgunner is on a distinguished road
Default

Quote:
Originally Posted by swampthing View Post


Just drove it today for the first time on a few weeks(blew a tire and had to wait for cash to buy another one) and it must know im trying to figure it out cause its running perfect...I'm going to drive it to work today and see if its working right still.

Incidentally, if anyone has seen sawgunner tell him he owes me a pcm tray :-p
haven't been back to NH to find it yet and my family is a bunch of idiots so can't rely on them to find it
sawgunner is offline   Reply With Quote
Old 07-15-2011, 12:45 PM   #23
Senior Member
Posts like a 4 Banger
Thread Starter
 
swampthing's Avatar
 
Join Date: May 2008
Location: Homosassa, Florida (yes it says Homo)
Posts: 115
Thanks: 0
Thanked 0 Times in 0 Posts
swampthing is on a distinguished road
Default

Lol that'* ok just don't forget if and when you go that way,
swampthing is offline   Reply With Quote
Old 07-17-2011, 12:26 AM   #24
Senior Member
Posts like a 4 Banger
Thread Starter
 
swampthing's Avatar
 
Join Date: May 2008
Location: Homosassa, Florida (yes it says Homo)
Posts: 115
Thanks: 0
Thanked 0 Times in 0 Posts
swampthing is on a distinguished road
Default

Drove it tonight, outside temp of 78. Drove about 30 minutes of cruising with the occasional traffic light. I noticed the IAT was consistently staying about 95 even at highway speeds. If I gunned it it would cool down but quickly return once I let off.

When I installed it it seemed very close to the coupler, so close in fact that it caught the edge and broke the plastic cage off the sensor. It seems like it mights be getting some heat soak. Would relocating the IAT further away be of any benefit?
swampthing is offline   Reply With Quote
Old 07-17-2011, 12:42 AM   #25
Senior Member
Certified GM nut
 
SignOfZeta's Avatar
 
Join Date: Mar 2005
Location: New Milford, CT
Posts: 2,284
Thanked 16 Times in 13 Posts
SignOfZeta has a spectacular aura aboutSignOfZeta has a spectacular aura about
Default

Quote:
Originally Posted by swampthing View Post
Would relocating the IAT further away be of any benefit?
Probably would.

I know that newer MAF'* also act as an IAT sensor (e.g., 3800 Series III), but on older cars like ours, I expect that the computer would be happier if you could put the IAT sensor in roughly the same spot as it is on a stock engine.

If you need an IAT extension cable, ZZP sells one that won't break your wallet too badly.
SignOfZeta is offline   Reply With Quote
Old 07-17-2011, 10:45 AM   #26
Senior Member
Posts like a Supercharger
 
gonzo4191's Avatar
 
Join Date: Jul 2007
Location: LZ, IL
Posts: 164
Thanks: 0
Thanked 0 Times in 0 Posts
gonzo4191 is on a distinguished road
Default

extend it with regular wire, extend one wire at a time,then drill a 1/2 hole into the filter and rtv it into there
gonzo4191 is offline   Reply With Quote
Old 07-19-2011, 11:20 PM   #27
Senior Member
Posts like a 4 Banger
Thread Starter
 
swampthing's Avatar
 
Join Date: May 2008
Location: Homosassa, Florida (yes it says Homo)
Posts: 115
Thanks: 0
Thanked 0 Times in 0 Posts
swampthing is on a distinguished road
Default

well since the car has decided to make me look like a total idiot by behaving itself in front of company, I decided to pursue the evap codes...

a brief history, I had codes P0452, P0453, P0440 and some other one all related to the evap. I changed the vapor solenoid, which cleared them for a few days and then returned. then I installed the fuel tank pressure sensor and now all are gone except the P0440 which shows up along with the Check Gas Cap message on the DIC.

what direction should I take with this search? I know to inspect my vacuum lines and have went over all the underhood ones several times. would I be better off getting a smoke test done instead of jumping at shadows?
swampthing is offline   Reply With Quote
Old 07-22-2011, 11:52 AM   #28
Senior Member
Posts like a 4 Banger
 
Join Date: Apr 2011
Location: Walled lake michigan
Posts: 106
Thanks: 0
Thanked 0 Times in 0 Posts
jezze is on a distinguished road
Default

I had same issue, after looking into it there was a vacuum line on the bottom of the that was cracked on the lower side I could not see. I replaced it and never again came back.
jezze is offline   Reply With Quote
Old 07-28-2011, 10:01 PM   #29
Member
Posts like a V-Tak
 
Join Date: Oct 2008
Location: Swansea Ma.
Posts: 92
Thanks: 0
Thanked 0 Times in 0 Posts
DanSSEi00 is on a distinguished road
Default

A massive vacuum leak will cause high fuel trim numbers (your 99%) and will cause an obvious problem.Hows the knock sensor? Is the engine pinging at all? This one seems interesting...And are you really in 123 degree heat? screw that!!
DanSSEi00 is offline   Reply With Quote
Old 07-31-2011, 03:25 PM   #30
Senior Member
Posts like a Northstar
 
charliemax's Avatar
 
Join Date: Jan 2006
Location: Valley Forge, PA
Posts: 598
Thanks: 0
Thanked 0 Times in 0 Posts
charliemax is on a distinguished road
Default

Quote:
Originally Posted by DanSSEi00 View Post
A massive vacuum leak will cause high fuel trim numbers (your 99%) and will cause an obvious problem.Hows the knock sensor? Is the engine pinging at all? This one seems interesting...And are you really in 123 degree heat? screw that!!
Yeah, what does that 99% mean? and are these snapshot numbers or averages? Or can you see the trims as the STFT tries to "work-down" the LTFT while the car is idling or throttled? Ya have to be able to do that, because there is a difference between an idling high LTFT and one during throttle. My experience with N/A Series II (I have two plus the SSEi, all 14+ yrs old) is that you can have a rather non-optimal LTFT at idle (on a $50 used Actron, that could read +10 to +14 , but as soon as you go to throttle.. everything turns to beautiful as the STFT pulls down the LTFT. Although the numbers are jumping like gnats, you can see that the net trim (STFT + LTFT) is in the sweet zone of +5 to -2.

If that 99% is equivalent to the 3800 +16.4 (that'* the max LTFT), you are sucking air. The PCM is piling on the fuel. FWIW, when that gets pegged at 16.4, the STFT is really working its sss off. If the net fuel trim (16.4 + STFT) gets just over +30.. you will be the proud owner of the legendary P0171. The pegged +16.4 LTFT is the universal smoking gun of a vacuum leak and the P0171.
charliemax is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Intense FWI or "ricer" intake? freaktweeker420 Performance, Brainstorming & Tuning 6 09-01-2007 12:16 AM
Intense FWI intake question ptrfair Performance, Brainstorming & Tuning 12 04-20-2007 12:58 AM
Dorman Upper Intake Manifold Issues ***MUST READ*** pontiacjeff General GM Chat 6 03-14-2006 12:23 PM
intake fixed...no more "issues"...except check eng LittleHoov 1992-1999 14 07-09-2005 10:56 AM
Rice pipe w/ heat sheild (CAI) vs. Fender well intake (FWI) 19bonne93 Performance, Brainstorming & Tuning 20 12-02-2004 01:10 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:55 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.