L92/L76 402 Project
Thread Starter
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
Guys, nobody is more anxious than me to get the car back. This is one of the very first in this configuration and we ran into a couple of NEW issues.
Relax, get a soda. We've posted every step of the way and will continue to do so.
Relax, get a soda. We've posted every step of the way and will continue to do so.
Safety Car
Joined: Jun 2004
Posts: 3,717
Likes: 0
From: Palmdale CA
St. Jude Donor '06
Originally Posted by WKMCD
Guys, nobody is more anxious than me to get the car back. This is one of the very first in this configuration and we ran into a couple of NEW issues.
Relax, get a soda. We've posted every step of the way and will continue to do so.
Relax, get a soda. We've posted every step of the way and will continue to do so.
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Le Mans Master
Joined: Oct 2001
Posts: 5,577
Likes: 3
From: Southern Maryland Maryland
I dont know if anyone can help but here is the problem we're having....
Startup:
Engine cranks over normally and fires
RPMs go to 1500 and raise to 2000. Its sits there just fine.
After about 30 seconds we notice the headers will start to glow red, all 8.
Any throttle will send the car to 4k and won't return any lower...
1) The TB is CLOSED, verified by scanner and visual
2) The intake is plugged @ every port
3) We've sprayed carb cleaner on the injectors @ 2000rpm and no change in engine speed
4) We've sprayed carb cleaner around the ports @ 2000rpm and no change in engine speed.
The fact the headers get glowing red almost says either timing or injector timing is off.
Initally the car ran and had a high voltage Cam position sensor code and we found wires that looked like they should be swapped, swapped them and the code went away. Car idled normally but high.
With the timing set to 0 the RPMs still are 1700.
Startup:
Engine cranks over normally and fires
RPMs go to 1500 and raise to 2000. Its sits there just fine.
After about 30 seconds we notice the headers will start to glow red, all 8.
Any throttle will send the car to 4k and won't return any lower...
1) The TB is CLOSED, verified by scanner and visual
2) The intake is plugged @ every port
3) We've sprayed carb cleaner on the injectors @ 2000rpm and no change in engine speed
4) We've sprayed carb cleaner around the ports @ 2000rpm and no change in engine speed.
The fact the headers get glowing red almost says either timing or injector timing is off.
Initally the car ran and had a high voltage Cam position sensor code and we found wires that looked like they should be swapped, swapped them and the code went away. Car idled normally but high.
With the timing set to 0 the RPMs still are 1700.
Racer
Joined: Nov 2005
Posts: 418
Likes: 0
From: Murrieta Ca..... America, fun while it lasted
Originally Posted by Phil97SVT
I dont know if anyone can help but here is the problem we're having....
Startup:
Engine cranks over normally and fires
RPMs go to 1500 and raise to 2000. Its sits there just fine.
After about 30 seconds we notice the headers will start to glow red, all 8.
Any throttle will send the car to 4k and won't return any lower...
1) The TB is CLOSED, verified by scanner and visual
2) The intake is plugged @ every port
3) We've sprayed carb cleaner on the injectors @ 2000rpm and no change in engine speed
4) We've sprayed carb cleaner around the ports @ 2000rpm and no change in engine speed.
The fact the headers get glowing red almost says either timing or injector timing is off.
Initally the car ran and had a high voltage Cam position sensor code and we found wires that looked like they should be swapped, swapped them and the code went away. Car idled normally but high.
With the timing set to 0 the RPMs still are 1700.
Startup:
Engine cranks over normally and fires
RPMs go to 1500 and raise to 2000. Its sits there just fine.
After about 30 seconds we notice the headers will start to glow red, all 8.
Any throttle will send the car to 4k and won't return any lower...
1) The TB is CLOSED, verified by scanner and visual
2) The intake is plugged @ every port
3) We've sprayed carb cleaner on the injectors @ 2000rpm and no change in engine speed
4) We've sprayed carb cleaner around the ports @ 2000rpm and no change in engine speed.
The fact the headers get glowing red almost says either timing or injector timing is off.
Initally the car ran and had a high voltage Cam position sensor code and we found wires that looked like they should be swapped, swapped them and the code went away. Car idled normally but high.
With the timing set to 0 the RPMs still are 1700.
Red headers..... it's way rich / not enough timing.
Burning Brakes
Joined: Aug 2006
Posts: 789
Likes: 38
From: Shreveport LA
Originally Posted by Phil97SVT
I dont know if anyone can help but here is the problem we're having....
Startup:
Engine cranks over normally and fires
RPMs go to 1500 and raise to 2000. Its sits there just fine.
After about 30 seconds we notice the headers will start to glow red, all 8.
Any throttle will send the car to 4k and won't return any lower...
1) The TB is CLOSED, verified by scanner and visual
2) The intake is plugged @ every port
3) We've sprayed carb cleaner on the injectors @ 2000rpm and no change in engine speed
4) We've sprayed carb cleaner around the ports @ 2000rpm and no change in engine speed.
The fact the headers get glowing red almost says either timing or injector timing is off.
Initally the car ran and had a high voltage Cam position sensor code and we found wires that looked like they should be swapped, swapped them and the code went away. Car idled normally but high.
With the timing set to 0 the RPMs still are 1700.
Startup:
Engine cranks over normally and fires
RPMs go to 1500 and raise to 2000. Its sits there just fine.
After about 30 seconds we notice the headers will start to glow red, all 8.
Any throttle will send the car to 4k and won't return any lower...
1) The TB is CLOSED, verified by scanner and visual
2) The intake is plugged @ every port
3) We've sprayed carb cleaner on the injectors @ 2000rpm and no change in engine speed
4) We've sprayed carb cleaner around the ports @ 2000rpm and no change in engine speed.
The fact the headers get glowing red almost says either timing or injector timing is off.
Initally the car ran and had a high voltage Cam position sensor code and we found wires that looked like they should be swapped, swapped them and the code went away. Car idled normally but high.
With the timing set to 0 the RPMs still are 1700.
Thread Starter
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
Originally Posted by Blue02ws6
I had that happen to mine after I got a mail order tune. It was in the throttle cracker table. They tuned it for a LS2 TB but i had a TPIS TB which they said it was different, I got the next tune back and it was much better with the AC off but with the AC on it did the same thing. Is the TB closed when it is reving at 4K? Might not be even the same thing but that is excatally how my car acted with the new tune. Everyone told me it was a vacuum leak but we couldn't find one.
Thread Starter
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
UPDATE 11/27/06
After a week hair pulling, Phil discovered that the L76 intake was defective from GM and had major air leaks in the 3 internal support columns. They look like casting defects that slipped by GM QC (or is that an oxymoron)
The good news is I contacted the guy I bought it from and he's overnighting another one that he checked out before sending.
Phil should have it in the morning. New manifold Install and tuning will start in earnest tomorrow.
After a week hair pulling, Phil discovered that the L76 intake was defective from GM and had major air leaks in the 3 internal support columns. They look like casting defects that slipped by GM QC (or is that an oxymoron)
The good news is I contacted the guy I bought it from and he's overnighting another one that he checked out before sending.
Phil should have it in the morning. New manifold Install and tuning will start in earnest tomorrow.
Premium Supporting Vendor
Joined: Oct 2004
Posts: 36,838
Likes: 438
From: Manassas Park VA
St. Jude Donor '07-'08,-'13-'14, '16-'17
Originally Posted by WKMCD
UPDATE 11/27/06
After a week hair pulling, Phil discovered that the L76 intake was defective from GM and had major air leaks in the 3 internal support columns. They look like casting defects that slipped by GM QC (or is that an oxymoron)
The good news is I contacted the guy I bought it from and he's overnighting another one that he checked out before sending.
Phil should have it in the morning. New manifold Install and tuning will start in earnest tomorrow.
After a week hair pulling, Phil discovered that the L76 intake was defective from GM and had major air leaks in the 3 internal support columns. They look like casting defects that slipped by GM QC (or is that an oxymoron)
The good news is I contacted the guy I bought it from and he's overnighting another one that he checked out before sending.
Phil should have it in the morning. New manifold Install and tuning will start in earnest tomorrow.
That would explain why I did not get a call on Sunday...
Peace
Chip
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Race Director
Joined: Mar 2004
Posts: 12,466
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From: Fort Wayne IN
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Originally Posted by WKMCD
UPDATE 11/27/06
After a week hair pulling, Phil discovered that the L76 intake was defective from GM and had major air leaks in the 3 internal support columns. They look like casting defects that slipped by GM QC (or is that an oxymoron)
The good news is I contacted the guy I bought it from and he's overnighting another one that he checked out before sending.
Phil should have it in the morning. New manifold Install and tuning will start in earnest tomorrow.
After a week hair pulling, Phil discovered that the L76 intake was defective from GM and had major air leaks in the 3 internal support columns. They look like casting defects that slipped by GM QC (or is that an oxymoron)
The good news is I contacted the guy I bought it from and he's overnighting another one that he checked out before sending.
Phil should have it in the morning. New manifold Install and tuning will start in earnest tomorrow.
Thread Starter
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
Originally Posted by Fastbird93
Wow........wouldn't have seen that coming. Was Phil just chasing a hunch when he pulled the manifold for a look?
