What's this plug for?

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon Jan 26, 2015 12:01 am

The one taped up in blue that the long nose pliers are pointing at.
It's on my BB4. OEM 2 pin plug, with only one wire.

Anyone know?

'92 Si VTEC · Post by **jjmartin349571** » Mon Jan 26, 2015 8:53 am

I'll take a peek at mine when I get home this eve, if nobody does beforehand.

Post by **Merlin** » Mon Jan 26, 2015 9:07 am

No idea. It isn't connected to anything on my 4th gen.

Post by **Vtecmec** » Mon Jan 26, 2015 9:14 am

I think it is for an external tacho?

Post by **newkid** » Mon Jan 26, 2015 9:36 am

Vtecmec wrote:I think it is for an external tacho?

Correct. Same plug as on civics.

Post by **Merlin** » Mon Jan 26, 2015 9:38 am

Cool! could be useful for setting timing, If I had an external tacho

.

Post by **newkid** » Mon Jan 26, 2015 9:42 am

If the prelude is anything like the civics you will find the higher up the range just how much out the standard rev counter is.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sat Jan 31, 2015 5:07 pm

Well done guys.

YouTube · Post by **Sailor** » Sat Jan 31, 2015 8:30 pm

newkid wrote:If the prelude is anything like the civics you will find the higher up the range just how much out the standard rev counter is.

How much does that actually matter?
My rev counter's about right at the vtec cut-in point and I don't think it's far off at the limiter. Good enough for me.