running too rich.
#141
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i would also like to just say this.
every morning when i go out and start the Jag, it runs differently than the day before. i had it running pretty spectacularly last night. very responsive, minimum amount of backfiring, no bog.
this morning its loping like the wolrds biggest cam and is idling at about 250 - 300 rpm. nothing i do will lean it out enough to run better. playing with the ECU, playing with the TPS etc.
im not sure if its a temperature thing or just a tempermental thing.
its certainly not the CTS, cause last night i had it bridged and running great, and today it wouldnt even start bridged. i had to plug the CTS back in to get it to start.
EDIT: ive just had to unplug 2 vacuum lines so that the engine can get enough air to idle properly.
every morning when i go out and start the Jag, it runs differently than the day before. i had it running pretty spectacularly last night. very responsive, minimum amount of backfiring, no bog.
this morning its loping like the wolrds biggest cam and is idling at about 250 - 300 rpm. nothing i do will lean it out enough to run better. playing with the ECU, playing with the TPS etc.
im not sure if its a temperature thing or just a tempermental thing.
its certainly not the CTS, cause last night i had it bridged and running great, and today it wouldnt even start bridged. i had to plug the CTS back in to get it to start.
EDIT: ive just had to unplug 2 vacuum lines so that the engine can get enough air to idle properly.
Last edited by M90power; 04-08-2012 at 10:15 AM.
#142
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results of o2 sensor test are:
bank A: 0.95-1.0v
bank B: 0.77-0.8v
this was after a 5 minute warm up in warm weather.
so i guess that means the o2 sensors are good. seems clear that bank A is running much more rich. keep in mind that my AAV has been removed so bank B should no longer be drawing more air at idle than bank A.
bank A: 0.95-1.0v
bank B: 0.77-0.8v
this was after a 5 minute warm up in warm weather.
so i guess that means the o2 sensors are good. seems clear that bank A is running much more rich. keep in mind that my AAV has been removed so bank B should no longer be drawing more air at idle than bank A.
Last edited by M90power; 04-08-2012 at 05:01 PM.
#143
Join Date: Mar 2008
Location: Pacific Northwest USA
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#144
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well i let it warm up for 30 minutes and i put a vacuum on the ECU to lean out the mixture enough to allow it to run.
0.7v across the board.
this engine runs ok in open loop. once it enters closed loop you have to trick the ECU for it to even idle.
0.7v across the board.
this engine runs ok in open loop. once it enters closed loop you have to trick the ECU for it to even idle.
Last edited by M90power; 04-08-2012 at 05:56 PM.
#145
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If you have the AAV blocked off, how are you getting additional air at cold start, and how are you setting you warm idle? That would explain your lope at 250-300 on a cold start. Do you see a rise in RPMs as the engine warms?
Also, with the AAV installed, the two banks have negligible difference in A/F ratio at idle due to the balance tube. Even though it doesn't look like it you shouldn't really be seeing a difference.
Wow...is there anything on this car the PO didn't mess with?
Also, with the AAV installed, the two banks have negligible difference in A/F ratio at idle due to the balance tube. Even though it doesn't look like it you shouldn't really be seeing a difference.
Wow...is there anything on this car the PO didn't mess with?
#146
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Location: Pacific Northwest USA
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#149
#150
#153
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well i got frustrated and decided to rewire the whole EFI harness and most of the amp wiring. then midway through that i decided to clean the V like someone suggested. so i took the intakes off, got fresh hose for the crossover, and new cam cover gaskets. now im just painting stuff up, polishing some of the steel and aluminum components, doing some upgrades, finishing up the wiring, and ill be sending the water manifolds off to the machine shop for the upgrade in the next few days. trying to source water rail gaskets and seals locally = failing.
giving the V12 one last chance to prove that its not worth lumping for a supercharged 3800.
and then somewhere in between the utter despair and overwhelming frustration of this build, i managed to find a soothing hobby.
giving the V12 one last chance to prove that its not worth lumping for a supercharged 3800.
and then somewhere in between the utter despair and overwhelming frustration of this build, i managed to find a soothing hobby.
Last edited by M90power; 04-24-2012 at 10:16 PM.
#154
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