What is its purpose?
Many thanks, Mark

Hey guys I think I found something. The 1590 ohms at pin 87 did not seem right. I tested the resistance at pin 87 with the ignition turned on, it read 2.6 Mega Ohms. I don't know the specs for the fuel injector current, but it would be a very tiny current flowing at 12 V through that kind of resista...

I tried again to start the 850 with a fully charged battery. A2 and A6 were totally empty of codes both before and after the try. The car did turned over well but did not even cough. Half way through the 20 second crank I tried some Starter fluid in intake. Below are the readings I got. Fuel Injecto...

Al,
I assumed they were old codes, but that is not all all certain.
Thanks. I will crank and pull codes as soon as the trickle charger
permits.

I got my fuel injector main relay delivered in about 30 hrs! It did not fix the problem. I should have tested the old one before I ordered. I have just now finished testing the old one. You can see that the relay has four terminals, namely 30,87, 85 and 86. Visit this site anyone who is unfamiliar w...

The IAC does buzz. I have ordered a Fuel Injector Main Relay, circa $29, since I don't see anything wrong with the wiring. I am so grateful for your input. I will advise.

I pulled codes prior to swapping CMP from s70. I found no errors only 1-1-1. I swapped in the newer CMP. At that time I did not pull codes. I then swapped back in the original 850 CMP. I now have many 3-1-4 codes. When I first tried to get codes now, I saw what was unexpected behavior. It is as if t...

I just got a set of noid lights on rental. I plug in the Bosch one and cranked, 5 revolutions twice. I seem to get an initial bright flash in the first rev and then maybe 3 revs without a bright flash followed then by a second flash. After one of the sets of revs I got a bright flash after I release...

Ozark Lee, You are sharp and I am not, I meant counter clockwise not clockwise. confused_al, unfortunately I don't see any code, just 1-1-1) There should be codes. System must be hosed. I have yellow spark at all plugs. I got the following compression readings (psi) for cylinders 1-4 (battery pooped...

Wires are according to firing order. 12453 , clockwise viewed from driver's side of car , with wire #1 at tallest position (at about 10 o'clock ) There is spark(yellowish) at all plugs. Belts are in good shape. Gas pressure rises quickly to 43 psi in rail. With the ignition on, I find battery voltag...