Check engine light on, code B2600

You have half of the process. You ground the green wire then you need an LED test light connected between pins one and two Then count the flashes on the LED. If it's an engine code it should be in the attached chart. Pull the code(s) and post them and we can see what the issue is.

You are welcome. Did find any codes or just not have much time to mess with it yet?

Needs to be an LED light and attached so the ground is on pin 1 and the tip is on pin 2. Then the LED will flash the codes. The LED blocks current in one direction and that tells the ECU to go into diagnostic mode.

Hi,

I noticed we haven't heard from you for a couple of days. Has any progress been made? We're interested in knowing.

Take care,

Joe

The easiest way to do that is to set it up and just start counting the flashes, write them down and then stop when you see them start to repeat again. So say it flashes 1-4, then 0-3 then 1-5 then you see 1-4 again, Stop and the codes are the 2 digit numbers you find. If you really have a problem see if you can record them in a video and post that on here and we can try reading them.

Loss of ground would cause a few issues. Great to hear you found it. Thank you for using 2CarPros.

Have you used the LED test light to pull the codes? If not, that is the first place to start. If the CEL came on while driving there will be codes stored.

Hi,

If you are able to get the distributor to the timing you mentioned, chances are that isn't the cause. When you replaced the head, are you sure the timing chain wasn't off a tooth?

Also, does it run poorly at idle? Have you checked things such as engine vacuum leaks and fuel pressure? If the poor running at 5 BTDC is limited to loading the engine, are you certain there isn't an issue with spark control (ignition advance)?

Let us know.

Take care.

Joe

Okay, you say you can set it to 8 degrees, and it runs fine, does it have any other issues other than the timing being off? No Check engine Light or loss of power or other issue? You are checking it with the test connector grounded, correct? If all of that is correct, I would bring number one up to TDC and verify that the timing mark is correctly on TDC with relation to the cover. Could you take a somewhat close up shot of the crankshaft pulley and post it on here? It's possible the outer ring has slipped on the rubber and that is the reason the timing shows as being wrong.

Okay, just wondered if it may have slipped, have seen it happen a few times. Nothing like trying to set timing when the target is always moving around. Here's a test, you say bumping the timing up helps, try moving it a bit higher and then see if the top end power improves, if it does it would mean that the timing isn't advancing the way it should. What does the mark show if you rev it in park? Being a 1990 they generally don't set codes until things are really bad. Sort of like someone who won't go to the doctor for anything less than a torn off limb or a bullet wound, everything else is just "wear and tear" I've seen OBD I cars that never set a code but were barely able to run from all the things actually wrong with them.