Leaning out after Fast 92?
Thread Starter
Burning Brakes
Joined: Oct 2010
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From: Philly Pa
Leaning out after Fast 92?
So I installed my new fast 92 today. it replaced my fast 78
Started right up no problem idled fine for about a 10 min drive. I come home I unplugged the battery to reset PCM and Then drive to the car to the car wash. Shut car off, wash car, on the way home idle started getting funky go to zero and then to 1k and would repeat this but would not die
so I'm assuming this is my car leaning out after the egt is getting to hot?
the car was tuned a couple years ago @ cartek
thinking of towing it to ecs for another tune ASAP
Started right up no problem idled fine for about a 10 min drive. I come home I unplugged the battery to reset PCM and Then drive to the car to the car wash. Shut car off, wash car, on the way home idle started getting funky go to zero and then to 1k and would repeat this but would not die
so I'm assuming this is my car leaning out after the egt is getting to hot?
the car was tuned a couple years ago @ cartek
thinking of towing it to ecs for another tune ASAP
Le Mans Master
Joined: Apr 2005
Posts: 8,077
Likes: 4
From: Scarborough ONTARIO
If cartek is close to you just drive up there and let em street tune it, dont you get some discount for Re-tune? Man if you want to get rid of fAST 92/90 TB than let me know i need it asap....seriously though.
Le Mans Master
Joined: Jul 2005
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From: Shreveport/Bossier Louisiana
St. Jude Donor '08
I'd take my business elsewhere.
Tech Contributor
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Sounds like an Idle issue or a vacuum leak. Do an Idle relearn and see if that corrects the idle issue. Check your work and insure that the ducting is all air tight and you do not have any vacuum leaks.
BC
BC
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Tech Contributor
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Thread Starter
Burning Brakes
Joined: Oct 2010
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From: Philly Pa
I didnt tune it in open loop cartek did. when I called them and asked them about this they said any car with a cam they tune in open loop.
my car has
5.3 stage 2.5 heads, thunder racing "Split Pattern" - 224/227 .563/.569 114 LSA, cartek 1/78 headers, RT cats and x-pipe, bansani catback
3.90 and cartek clutch
my car has
5.3 stage 2.5 heads, thunder racing "Split Pattern" - 224/227 .563/.569 114 LSA, cartek 1/78 headers, RT cats and x-pipe, bansani catback
3.90 and cartek clutch
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I didnt tune it in open loop cartek did. when I called them and asked them about this they said any car with a cam they tune in open loop.
my car has
5.3 stage 2.5 heads, thunder racing "Split Pattern" - 224/227 .563/.569 114 LSA, cartek 1/78 headers, RT cats and x-pipe, bansani catback
3.90 and cartek clutch
my car has
5.3 stage 2.5 heads, thunder racing "Split Pattern" - 224/227 .563/.569 114 LSA, cartek 1/78 headers, RT cats and x-pipe, bansani catback
3.90 and cartek clutch
When the car is in Closed LOOP, I would say, yea its NOT going to be correct. Your only in open loop at cold start up and when your at a throttle angle and load that causes the PCM to trip into open loop. That not very much in normal daily driving..
Hows your "highway" fuel economy????
If closed loop is locked out,, it wont be very good..
Doesn't sound correct to me unless there more to the story that you or I I'm being told. Did they do an SD Tune??? Like I said,, I'm not a tuner but,,,
Thread Starter
Burning Brakes
Joined: Oct 2010
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From: Philly Pa
I don't know =/ the old owner is 78 years old and lives around the block but he just payed for everything not really caring or getting specific's or maybe he's just forgotten
gas mileage is general is pretty bad around 15 average goes up to 25 or so on the highway
gas mileage is general is pretty bad around 15 average goes up to 25 or so on the highway
Thread Starter
Burning Brakes
Joined: Oct 2010
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From: Philly Pa
Instructor
Joined: Feb 2011
Posts: 235
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From: On a mountain New York
That is very poor mileage. You were getting this mileage before your intake swap? If so, time for a new, accurate tune and if you planned on seeing ecs you will be fine. Sometimes it is best to redo things that others did when you buy a modded car so you know what you are really dealing with.
Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I use Chuck COW Corvettes Of Westchester for ALL my tuning. The man is amazing. If you want a great tune, contact Chuck. He can straighten out your wacked out tune ,, NO PROBLEM!!!
Give him a call and discuss your issues and goals.
Bill Curlee
Give him a call and discuss your issues and goals.
Bill Curlee
Race Director
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From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
Safety Car
Joined: Sep 2007
Posts: 4,009
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From: South Florida
To answer your original question, yes it can lean out. You are getting a bit more air into the engine now, with the same amount of fuel. When I went from LS1 to LS6 intake manifold my tune was running on the lean side. The car needed to be re-tuned. Doug will get that thing idling like a champ.