Hondata

Try disconnecting the plug from your alternator and then start the car and datalog the voltage and see if it is still fluctuating like it was showing in the previous datalogs.

I haven't had a chance to datalog again but my car was cutting out again last night at part throttle so I checked the voltage at the battery. This time it was holding constant around 14.4 but it would occasionally drop down to around 12.8-13.0

Heres a datalog with my alternator unplugged.

Is there anything else I can provide to help diagnose this?

Was that datalog done with only the 4 wire plug disconnected or with the alternator completely disconnected and the car running off of battery only?

I just unplugged the 4-wire plug. I can disconnect the ground as well as the plug, and even take the belt off if needed. Just let me know.

Here is a datalog with the alternator wire and plug both disconnected.

It sounds like you may have a bad alternator. The voltage should not be higher running a battery without the alternator.

I had my alternator checked and the regulator was bad. I opened the top of the battery and all but one cell were dry, even though the battery checked out to be ok. So I replaced both the regulator and the battery. I was still having the same problem and I noticed fluctuation in my tps; I could open it to 3-4% and then it would drop to 0%. So I replaced the tps on Sat and my car drove great until yesterday. I was cruising along around 60mph and then it cut out to any throttle input. Everything still had power, the engine would even rev up when I downshifted, it just would respond to throttle and I could hear the throttle opening. As I slowed the engine stalled, I hit the ignition and it fired up and drove great the rest of the way to work and the rest of the day. Then this morning on my way to work the same thing happened, so I pushed in on the clutch when the throttle quit working to coast to a better place to pull off. While I had the clutch in, I tapped the throttle and the engine revved up like normal. So I let the clutch out and the engine responded but only to do the same thing around 500rpm later. So I drove the rest of the way to work losing throttle input, pushing the clutch and letting rpms drop to idle, getting throttle back for a few hundred rpms, and the whole thing starting over. Anyone have any ideas? I'll try to post a datalog later when I get home as long as it doesn't go away like it did yesterday. Please help.

Here's a datalog. Looking at the gear, it shows as though I switched gears like crazy. Toward the beginning and at the end it shows that I went through all 6 gears and then back down while only travelling 20mph. What sensor feeds this? I know that I had to push in on the clutch a lot to get the engine to respond again but it wasn't as often as the graph shows and not in the gears it shows either. Also, the tps looks very jagged to me. Any thoughts on this? Thanks for the help.

After I posted the above datalog yesterday, I got to thinking about the inconsistency of my tps signal. I was going to start tracing voltage and continuity starting with the connector but when I touched it, the signal dropped off completely. So I started moving the connector a little in different directions and the signal would fluctuate all over the place. So I unplugged the tps completely (an OmniPower sensor) and plugged an old junk oem tps into the connector and it fits snug where the Omni has a little play in it. So I sprayed the terminals out to clean them, covered both male and female connector ends with dielectric grease and ziptied the connector as tight as I could on to the tps. This has helped a lot but it will still cut out after a while of driving. Has anyone ever had a problem like this? Any suggestions? Thanks!

You may want to contact Omnipower then about their TPS sensor.