Well I have some searching and did not find a direct answer. I need to adjust the idle on my 88 DX OBD0 B16 CRX. I was told before I do so, that a service pin needs to be jumped.... but i cannot seem to find it

 

When adjusting the base ignition timing,
Jumper the service connector located here:

 

thanks alot...you even got the color right ... and where should this be sett at?

 

Some cars have the jumper inside the car, above and to the right of the ecu.

 

yeah... so I am told. Is it yellow?

 

On an '88 model,it is under the hood..

The yellow piece is only a cover..
The connector is inside that which yours may not have..
The wires are green/white and brown/blue.



Ignition timing stock is 15 degrees before top dead center..
Which is the middle mark in the group of three..
{I will post a pic later when my host service is working..}


Modified by 88DXCRX at 3:07 PM 1/7/2006

 

can someone explain what is this all about. I worked on my crx for long time, boltons. I had notice that plug and thought nothing of it. What do you actually do with that plug?

 

It is for setting the base ignition timing..

Jumpering the connection lets the ECU know that the
timing is being manually adjusted so that it does not try to
compensate for the changes when the timing is altered..

 

OOOoooo got it.

 

Can someone explain to me how to adjust the timing?

You guys are talking about the part where you adjust the distributor, right?

It's so fundamental, yet I've NEVER done it and have no clue how to check it.

 

1.Warm the engine up to operating temperature.
2.Jumper the service connector.
3.Hook up timing light,Red to positive,Black to negative and
then hook the inductive pick-up from timing light to plug wire #1
Wire closest to the drivers side..
4.Shine the blinking light at the timing marks on the timing
cover and align to the timing mark on the crank..

If it needs to be altered,you will have to loosen the three bolts
and rotate as needed..

When timing is set,tighten the bolts,remove the jumper and disconnect
timing light..

 

I thought for the b16a1 tdc is 15 degrees.

 

The manual does say 15 degrees +/- 2 degrees
So technically we are both correct..
But I guess the middle mark is 15 not 16 degrees..

 

So how do you tell if it's 15 degrees?

Does it flash or something and you count the number of flashes, or what?

 

The timing light acts like a strobe light..
It gives the visual illusion that motion is being stopped..

Every time the light blinks,you get a "freeze-frame" effect
Doing this you can move the distributor back/forth until
the timing mark is aligned with the timing tab..


In this pic,the crank is set on TDC and the red mark represents
15 degrees before TDC {crank rotates counter-clockwise}
So when setting the ignition timing,when the light blinks,
the red mark should be where the white mark is now...
Edit: here is what it looks like if you are working on a D series engine:



Modified by 88DXCRX at 2:42 PM 1/7/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 88DXCRX &raquo;</TD></TR><TR><TD CLASS="quote">The timing light acts like a strobe light..
It gives the visual illusion that motion is being stopped..

Every time the light blinks,you get a "freeze-frame" effect
Doing this you can move the distributor back/forth until
the timing mark is aligned with the timing tab..


In this pic,the crank is set on TDC and the red mark represents
15 degrees before TDC {crank rotates counter-clockwise}
So when setting the ignition timing,when the light blinks,
the red mark should be where the white mark is now...</TD></TR></TABLE>

Beyond what I was asking but you posted some good info... nice to know guys like you are around and have enough sense to be helpfull instead of flame. Everyone on here was a noob at some time or another. Ever in WA I will buy you a beer