That's where to start. The thing that bothers me is the O2s are not in the loop at startup so you should not be seeing this .
DTC experts... strange issue
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 7,625
Likes: 4
From: Director of Bands
St. Jude Donor '08
DTC experts... strange issue
When I first start my 93 LT1 A4 after sitting for a day or two, I get the SES light on right after start up. It stays on for about 10 minutes or so and then as I drive it go out on its own. This has happened about 3 times now. Every time I pull the code, I get a DTC 64 (lean condition). This only happens after the car has sat (at least) overnight and only on initial start up. the light then goes out on its own.
Any ideas? I am wondering if - somehow - there might be condensation forming in the fuel system or something over a longer period of inactivity.
Any ideas? I am wondering if - somehow - there might be condensation forming in the fuel system or something over a longer period of inactivity.
Supporting Vendor
Joined: Mar 2008
Posts: 1,762
Likes: 14
From: Cumming Ga
When I first start my 93 LT1 A4 after sitting for a day or two, I get the SES light on right after start up. It stays on for about 10 minutes or so and then as I drive it go out on its own. This has happened about 3 times now. Every time I pull the code, I get a DTC 64 (lean condition). This only happens after the car has sat (at least) overnight and only on initial start up. the light then goes out on its own.
Any ideas? I am wondering if - somehow - there might be condensation forming in the fuel system or something over a longer period of inactivity.
Any ideas? I am wondering if - somehow - there might be condensation forming in the fuel system or something over a longer period of inactivity.
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 7,625
Likes: 4
From: Director of Bands
St. Jude Donor '08
Is there a link that describes how to do this? I checked the tech tips.. to no avail.
***update***
Duh... sort of answered my own question...
http://forums.corvetteforum.com/show...=test+injector
So how would this test refer to the code 64 in question?
Is the car still safe to drive? There doesn't appear to be any drivability issues at all.
Any idea how much a set of new injectors goes for?
***update***
Duh... sort of answered my own question...
http://forums.corvetteforum.com/show...=test+injector
So how would this test refer to the code 64 in question?
Is the car still safe to drive? There doesn't appear to be any drivability issues at all.
Any idea how much a set of new injectors goes for?
Last edited by eschoendorff; Aug 8, 2008 at 10:46 AM.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 7,625
Likes: 4
From: Director of Bands
St. Jude Donor '08
I know, it's weird... and then it just goes away. I am assuming the car is still good to go because there is not hesitation, no misses, no rough idle, nothing. Car drives great in fact.
Melting Slicks
Joined: Oct 2006
Posts: 2,314
Likes: 3
From: In a van down by the river! Florida
I dunno where your located, but I'm having the same troubles, and it seems to have started as soon as all the stations here switched to 10% ethanol.
I'm investigating everything else before I point my fingers there, but its starting to look that way more and more
I'm investigating everything else before I point my fingers there, but its starting to look that way more and more
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Supporting Vendor
Joined: Mar 2008
Posts: 1,762
Likes: 14
From: Cumming Ga
is there a link that describes how to do this? I checked the tech tips.. To no avail.
***update***
duh... Sort of answered my own question...
http://forums.corvetteforum.com/show...=test+injector
so how would this test refer to the code 64 in question?
Is the car still safe to drive? There doesn't appear to be any drivability issues at all.
Any idea how much a set of new injectors goes for?
***update***
duh... Sort of answered my own question...
http://forums.corvetteforum.com/show...=test+injector
so how would this test refer to the code 64 in question?
Is the car still safe to drive? There doesn't appear to be any drivability issues at all.
Any idea how much a set of new injectors goes for?
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 7,625
Likes: 4
From: Director of Bands
St. Jude Donor '08
Got your PM, thanks.
I guess I'll just keep driving the car until something a little more concrete happens. The thing drives just fine and the code 54 only pops up on start up.... it just seems that if my injectors were a problem that the code would be a little more consistent, like popping up on every start up. I am a little concerned because the code 64 specifies a lean condition and I don't want to harm the engine, but the lean condition seems to correct itself within the first 10 minutes of start up...
So in short, I guess I'll just keep driving the car, clear the codes and check the ohm of the injectors when I get a chance.
I guess I'll just keep driving the car until something a little more concrete happens. The thing drives just fine and the code 54 only pops up on start up.... it just seems that if my injectors were a problem that the code would be a little more consistent, like popping up on every start up. I am a little concerned because the code 64 specifies a lean condition and I don't want to harm the engine, but the lean condition seems to correct itself within the first 10 minutes of start up...
So in short, I guess I'll just keep driving the car, clear the codes and check the ohm of the injectors when I get a chance.