Desperately need help with my TBI
07-25-2005, 06:17 AM
#52
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Car: El camino 70 ss
Engine: corvette lt1 94
Transmission: 4L60E
looks like its trying but cant async fuel(sometime it can for sec).
a lots of dataerrors when it tryes async fuel and ae.
with some dataerrors its gets error kodes iat,campulse,epromcheksum,tpshigh,estknock,vats,maphigh,overtemp,undertemp,o2,o2rich.
start to belive its bad connections somwhere at the ecu,memcal
grounde.
someone got a clue??????
a lots of dataerrors when it tryes async fuel and ae.
with some dataerrors its gets error kodes iat,campulse,epromcheksum,tpshigh,estknock,vats,maphigh,overtemp,undertemp,o2,o2rich.
start to belive its bad connections somwhere at the ecu,memcal
grounde.
someone got a clue??????
Last edited by honken; 07-25-2005 at 06:19 AM.
07-26-2005, 04:43 AM
#53
Hi again,
I set the timing back and cleared the ECM. I also looked at the injectors and they infact appear to be dripping some. It is at least _not_ a perfectly fine cone-shaped spray.
BUT, I did another thing as well: I was under the car looking at the O2 sensor, and started thinking that the fact that as a part of the exhaust/headers upgrade last year, it was moved forward to the left header much like on the Camaro. But originally it sat a little further back, right before the cat. SO, I moved it back where it had originally been. Then went on to the test station to check the CO - which was now down from the 5 - 9% range to 0.2 - 1% range!!! The legal limit is 0.5% - so now it actually is (occationally) within the limit.
So now Im hoping that an AFPR and some new injectors may help me out? Does summit sell any injectors that would work? I was going to buy from cfm-tech.com, but they don't do international sales.....
Today Im going to do another log to see if there is any change after last nights work. I'll post the log when I get home.
One new "behaviour" that has started in the last few weeks is that after driving around for a while, if the car is then sitting idling - it after a short period of time starts to rapidly cycle up and down in RPMs. Take a look at the log posted above from recording 11775 to 11975 and you will see what I mean. This usually stops after maybe 30 seconds.
Any idea what can cause this?
Ken
I set the timing back and cleared the ECM. I also looked at the injectors and they infact appear to be dripping some. It is at least _not_ a perfectly fine cone-shaped spray.
BUT, I did another thing as well: I was under the car looking at the O2 sensor, and started thinking that the fact that as a part of the exhaust/headers upgrade last year, it was moved forward to the left header much like on the Camaro. But originally it sat a little further back, right before the cat. SO, I moved it back where it had originally been. Then went on to the test station to check the CO - which was now down from the 5 - 9% range to 0.2 - 1% range!!! The legal limit is 0.5% - so now it actually is (occationally) within the limit.
So now Im hoping that an AFPR and some new injectors may help me out? Does summit sell any injectors that would work? I was going to buy from cfm-tech.com, but they don't do international sales.....
Today Im going to do another log to see if there is any change after last nights work. I'll post the log when I get home.
One new "behaviour" that has started in the last few weeks is that after driving around for a while, if the car is then sitting idling - it after a short period of time starts to rapidly cycle up and down in RPMs. Take a look at the log posted above from recording 11775 to 11975 and you will see what I mean. This usually stops after maybe 30 seconds.
Any idea what can cause this?
Ken
07-26-2005, 06:26 AM
#54
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Car: El camino 70 ss
Engine: corvette lt1 94
Transmission: 4L60E
The iac is down to 6 and rpm drops ae tips in and then it rolls.
Reset the ecm and let it learn with the new setup.
New setup new values.
Can take some time.
If that dosent work reset iac and tps.
The dripping can corce the pendling in the co and the idle.
Maybe some clining solvent in to the gas tank.
Reset the ecm and let it learn with the new setup.
New setup new values.
Can take some time.
If that dosent work reset iac and tps.
The dripping can corce the pendling in the co and the idle.
Maybe some clining solvent in to the gas tank.
Last edited by honken; 07-26-2005 at 06:48 AM.
08-24-2005, 05:47 PM
#55
Just wanted to post an update to this.
I got a set of injectors - and it now runs better than it has EVER done since I got i 3 years ago. It is butter-smooth and the black smoke is gone!!
I also passed the inspections last week, so now Im good for 2 more years. It should be mentioned that I barely passed the smog test though, as it was right on the borderline. But hey, thats good enough!
I was so fed up with working on the damn thing that I have not done anything since it passed inspections. But I will take out the laptop one of these days and log it to see what it shows now.
Anyways - thanks a WHOLE lot for all help and suggestions that helped me resolve this problem!
Ken
I got a set of injectors - and it now runs better than it has EVER done since I got i 3 years ago. It is butter-smooth and the black smoke is gone!!
I also passed the inspections last week, so now Im good for 2 more years. It should be mentioned that I barely passed the smog test though, as it was right on the borderline. But hey, thats good enough!
I was so fed up with working on the damn thing that I have not done anything since it passed inspections. But I will take out the laptop one of these days and log it to see what it shows now.
Anyways - thanks a WHOLE lot for all help and suggestions that helped me resolve this problem!
Ken
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