Spark and fuel look alright?
Thread Starter
Joined: May 2006
Posts: 3,974
Likes: 2
From: Spring Hill, FL
Spark and fuel look alright? Hi,
This car has been driving me insane since last November. It is a LT1 Camaro running a 24x conversion.
POST #3: I have removed all links to scans as I half sorted out fuel.
Please look below for screen shots of what I'm currently looking at.
So last week I thought I narrowed my issue down to leaky injectors. The car bogs under light throttle, less than 20%. Sometimes it is really bad, the RPMs hang, then it continues to accelerate and shows a rich condition, almost like the cylinder has filled up with fuel. So I swapped from 36 lb/hr injectors to 30 lb/hr injectors. Let my tuner know, he mailed me a new tune file. I loaded it up, car still does the same thing.
I'm using EFI Live v2 by the way. The PCM is loaded with o/s 5.
The car felt worse on the revised tune though, so I reloaded the initial 30lb injector tune that was sent to me. It was suggested to me to swap coils side to side and also swap o2 sensors side to side.
So I have smoke and a raw fuel smell coming out of the exhaust still, the car takes a while to settle into a steady idle, turn on or off the A/C and it freaks out for about 10 seconds looking for idle. Very choppy acceleration if under 20% throttle. I just don't know, pretty much losing my mind at this point.
Any help is appreciated, please let me know what else you all would like to see, or other PIDs loaded, etc.....
Edit: What tables should be modified for the different injectors? Under fuel-injectors-injector fuel rate both my original tune with 36lb injectors and the new tune for 30lb injectors states 4.5391? The same number is from 0-80 on the whole chart, the kPa chart that is displayed, for both tunes?
So they are 30 lb/hr redtop injectors, and its a LT1 so fuel pressure is 39 psi at idle I believe at around 43psi at WOT.
This car has been driving me insane since last November. It is a LT1 Camaro running a 24x conversion.
POST #3: I have removed all links to scans as I half sorted out fuel.
Please look below for screen shots of what I'm currently looking at.So last week I thought I narrowed my issue down to leaky injectors. The car bogs under light throttle, less than 20%. Sometimes it is really bad, the RPMs hang, then it continues to accelerate and shows a rich condition, almost like the cylinder has filled up with fuel. So I swapped from 36 lb/hr injectors to 30 lb/hr injectors. Let my tuner know, he mailed me a new tune file. I loaded it up, car still does the same thing.
I'm using EFI Live v2 by the way. The PCM is loaded with o/s 5.
The car felt worse on the revised tune though, so I reloaded the initial 30lb injector tune that was sent to me. It was suggested to me to swap coils side to side and also swap o2 sensors side to side.
So I have smoke and a raw fuel smell coming out of the exhaust still, the car takes a while to settle into a steady idle, turn on or off the A/C and it freaks out for about 10 seconds looking for idle. Very choppy acceleration if under 20% throttle. I just don't know, pretty much losing my mind at this point.
Any help is appreciated, please let me know what else you all would like to see, or other PIDs loaded, etc.....
Edit: What tables should be modified for the different injectors? Under fuel-injectors-injector fuel rate both my original tune with 36lb injectors and the new tune for 30lb injectors states 4.5391? The same number is from 0-80 on the whole chart, the kPa chart that is displayed, for both tunes?
So they are 30 lb/hr redtop injectors, and its a LT1 so fuel pressure is 39 psi at idle I believe at around 43psi at WOT.
Last edited by camar0corey; Sep 11, 2011 at 08:42 PM. Reason: title edit
Thread Starter
Joined: May 2006
Posts: 3,974
Likes: 2
From: Spring Hill, FL
Alright! I found that spreadsheet thing online so I got some realistic numbers in that table, car is running a lot better, but still not "normal". I don't know what else should I look at fuel wise, or maybe it has too much timing?
Thread Starter
Joined: May 2006
Posts: 3,974
Likes: 2
From: Spring Hill, FL
OK here are the values I have for the 30 lb. injectors, do they look alright?
I had used some awesome spreadsheet online that calculated the values for you, but now of course I'm having a hard time finding it again as I was at a friends house when I found it.
As I said in post one, initially the value in all the fields was 4.5391.
Here is what the spark table looks like:
I'm new to this, but the car seemed to run a bit better today with some taken out, but I think I didn't do it very smoothly as mine looks like this:
Which with what I attempted I managed to trip a lean condition trouble code and a rich condition trouble code.
So I'm new to all this and the car with the top timing table seemed to run worse than my sad attempt though, kinda lazy below 20% throttle like there is too much something, whether it is timing or fuel. Just seems to me 30+ on timing is excessive, but maybe it isn't?
Also car mods: CC503 cam, ported heads(nothing fancy), longtubes, etc. 24x conversion.
Please, some opinions or advice would be greatly appreciated or let me know anything you all would like to see, datalogs, the tune file, screen shots of various settings, etc...
I had used some awesome spreadsheet online that calculated the values for you, but now of course I'm having a hard time finding it again as I was at a friends house when I found it.
As I said in post one, initially the value in all the fields was 4.5391.
Here is what the spark table looks like:
I'm new to this, but the car seemed to run a bit better today with some taken out, but I think I didn't do it very smoothly as mine looks like this:
Which with what I attempted I managed to trip a lean condition trouble code and a rich condition trouble code.
So I'm new to all this and the car with the top timing table seemed to run worse than my sad attempt though, kinda lazy below 20% throttle like there is too much something, whether it is timing or fuel. Just seems to me 30+ on timing is excessive, but maybe it isn't?
Also car mods: CC503 cam, ported heads(nothing fancy), longtubes, etc. 24x conversion.
Please, some opinions or advice would be greatly appreciated or let me know anything you all would like to see, datalogs, the tune file, screen shots of various settings, etc...
Thread Starter
Joined: May 2006
Posts: 3,974
Likes: 2
From: Spring Hill, FL
Alright I reloaded the original timing and just knocked the 40's down to 35. My attempt at timing resulted in the car backfiring half the time.
I also adjusted the dwell tables to the d585 table I found on here, as I am running the truck coils.
Bank 1 is the driver side right? For some reason its always pulling fuel from bank 1 and adding fuel to bank 2. This doesn't make any sense as on a lt1 bank 2 gets fuel first anyway and is normally already richer. Unless bank 1 is not the driver side?
Anybody?
I also adjusted the dwell tables to the d585 table I found on here, as I am running the truck coils.
Bank 1 is the driver side right? For some reason its always pulling fuel from bank 1 and adding fuel to bank 2. This doesn't make any sense as on a lt1 bank 2 gets fuel first anyway and is normally already richer. Unless bank 1 is not the driver side?
Anybody?
