Spunkster wrote:Sounds like the ground next to the passenger side engine mount has been left off.
Are you talking about the ground from the rear passenger side of the valve cover to the top of the passenger side strut tower? If so, I have that grounded as well. Here is a pic of my engine bay:
SORRY for the HORRIBLE quality
Basically the driver side and passenger side grounding is 4ga battery cables going from the body to valve cover and body to transmission.
In addition, I have the grounding for the engine harness from fuel rail to valve cover as well as that fat grounding from my intake manifold to the front frame.
Ok, with all the driving I've been doing trying to datalog this, it's happening a lot more now. Definitely need to get this fixed...it bogs quite often even around 3-4k rpm. I'll attach two more datalogs that I was able to capture this morning while driving.
At one point I even threw P1336 CRK Sensor Intermitent Interruption. Wondering if my wiring there is bad being that this is the ONLY plug on my harness that I had to de-pin and put a different plug on becuase I had to use a EP3 ('04 Civic SI) engine harness to bypass the throttle by wire setup but the TSX crank sensor is differently pinned than the SI.
Car has been running fine for 6 months and only reason I noticed the bog in the first place was during street tuning and revving close to redline. I never noticed the issue before because I rarely ever drive it hard like that...not sure why it's getting worse after all this time...
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I did the engine harness. It is a stock '04 Civic SI engine harness. I just removed the crank sensor plug and put the TSX plus onto it (changed the wiring order on the plug as well to match the TSX crank sensor).
O2 sensor is an RSX Type-S that I purchased from a junk yard.
Just to make sure you know, here is my setup:
k24a2 TSX engine with '04 Civic SI transmission
'04 Civic SI engine harness
Hybrid-Racing PnP harness for install into EG civic
RSX Type-S ECU with Kpro
Accord Throttle body
Everything on engine is stock except for any parts I needed to swap as mentioned above (Accord Throttle body and Civic SI engine harness). Engine was practically new 6 months ago when I did the swap (only 52 miles on it).
There is a problem where the ECU is losing the signal from the cams and/or crank sensors. Check the wiring to the sensors, and check that the wiring harness is giving the cam sensors power all the time. It is an intermittent problem, so it is not going to be easy to track down.
Another issue is that the short term fuel trim is very high (-15 to -20%). It could be that you've kept adding fuel to sort out other issues.
so the intermittent CRK sensor could be either crank sensor OR cam sensor? If that's the case, I'll just have to examine the sensors/wiring around there and hopefully find something...
Hmm...hard for me to picture that right now at work but I assume you mean where the mounting bracket mounts to the block? So take off one of the bolts to the engine mount bracket on the engine and put the ground there?
Another thing I was suggested was my pulley setup. I am not running the stock pulley belt as I have no a/c on my k24a2. I was told that it's possible that you could see voltage drop if the pulley slips?
I've been told that the belt setup recommended might not be the correct tension or could become too loose after time. If that IS the case, it could explain why it's been driving fine and beginning to get worse lately?
Well fixing ground didn't change the situation much and the pulley setup was still in the FSM's allowed tension limit so I didn't change it. Finally had my battery checked again and they said it was just about toast.
Bought a new battery and all the occasional bogs disappeared completely. Accelerates smoothly all the way to redline!
I'm very happy that I was able to finally get this thing fixed. Thanks so much for all your guys help. :D
