S2000 Under The Hood S2000 Technical and Mechanical discussions.

Engine cutting out

Old Jul 10, 2008 | 04:39 AM
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From: Columbus
Default Engine cutting out

So I have been having some problems with my engine cutting out. I began to diagnose it through Hondata and they have been helpful, but I would like to get this taken care of asap, so I'm reaching out everywhere. Basically, the engine would cut out at very light throttle almost like the throttle plate was abruptly closed or the engine lost fuel or the ecu briefly cut out. With Hondata's help, I found a bad voltage regulator and I also replaced my battery. I also sent my injectors out to be cleaned, which I found out were not bad to begin with. Then I noticed my tps voltage completely dropping off at low input. So I replaced my tps and it drove great for a few days. Now its back and it seems worse than ever. I completely lose throttle input until I push the clutch in, which allows it to take throttle. With the clutch depressed, the engine will rev freely but when I let the pedal out the engine will rev a few hundred rpm's and then cut out again. This started this morning and it took forever to get to work; pushing in on the clutch, revving a few hundred rpms, repeat. The odd thing is that sporadically, it would take off and I could drive like normal but then it would cut out again and start all over. Anyone have any ideas?

One more note, after replacing the battery and voltage regulator I began getting a random misfire cel with the accompanying individual cylinder misfire codes. I know its not from my injectors and I have swapped plugs but no luck. My Honda service manual states to check fuel pressure and then compression. Compression is good across all cylinders but I have not checked fuel pressure. I did swap fuel pressure regulators but that didn't work. Are these symptoms of a failing fuel pump?

Here is a link to my Hondata thread:

http://hondata.net/forum/viewtopic.php?t=7...der=asc&start=0
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