[wemertz]

I am in the process of putting the engine back together and have found an electrical connector that I can't remember where it goes.
It is part of a three wire harness: One wire comes out of the harness and goes to the firewall on the passenger side. The other two (Black & Black with Grey Tracer) goes to the connector.

I am attaching photos in the hope that someone out there will take a peek under their hood and tell me where the stupid thing goes.

Thanks

Wayne

 

[albrow100]

It's unused

 

[wemertz]

Yes, It has all the options. It is a conversion van fully equipped with all sorts of stuff. It was just given to me, so the only money I have into it is all the parts need to repair an 0300 code which I still haven't resolved! All of a sudden the truck doesn't want to start, so I thought this might be the culprit. PS: I still do not see where it would connect up???? Would you happen to have a picture of it plugged into its proper location?

Thanks,

Wayne

 

[1lowcab]

It plugs into nothing, all Astro/Safaris have it hanging there.
I tend to think it is some test connector for the assembly line.
Don't worry about it and just tuck it in back where it was.

 

[Big_kid]

Wemertz- first welcome aboard!
Second- don't take it personally if anyone posts "Not this question again". It seems like every other week or so we get a new poster in asking this, and posting the same shot of their van. Some would think it's only exceeded by selfies and "what I had for dinner" shots on Facebook. You can't be faulted for not knowing what you don't know.

You can't remember where it goes because you didn't unplug it. If you had, the mating portion of the plug would be MUCH cleaner than the rest of the plug. This is why I sometimes don't clean things until reassembly. The dirt will tell a story if you let it.

The P0300 is a random misfire. Common causes are distributor cap/rotor/wires/plugs/coil/ground, and/or a worn distributor drive gear. I'd start by checking these, maybe cleaning the terminals inside the cap to see if it will start again before throwing parts at it. That can get expensive fast, and throw more variables into a situation with an unknown cause making proper diagnosis more difficult.

Good luck, and post up your results/questions along the way.

:chevy:

 

[wemertz]

On the P0300 code: I have to date: Replaced the distributor cap, rotor, wires, plugs, fuel pump, Plenum gasket, spider injectors, temp sensor, EGR Valve, MAP sensor, MAF sensor. Using a smoke machine, I found a leak where the distributor contacts the lower intake manifold and replaced the felt washer (still leaks). I am not sure how much the leak affects the sensors, but I am running rich when I can start the truck.

 

[rfmartz]

Sorry, never mind there was an ad covering the second picture. Just like said previous post. Hooks up to nuthin"

 

[sixsix]

Sorry, never mind there was an ad covering the second picture. Just like said previous post. Hooks up to nuthin"

Not so true - ask the people w/ rr wiper /washer if they have it.

Mike

 

[markmitch]

probably the distributor itself

 

[dchan51360]

Yup. 99 astro with the original distributor, I'd be looking at the dizzy as well.

search "pancake disease"

 

[sixsix]

Don't think that connector reaches the Dist.

But it would reach a second windshield washer bottle motor.

Mike

 

[Miamiboy305]

Hi,, it looks like the iat (intake air temperature sensor conector) it goes on the air filter duct, past the maf sensor

 

[gman]

I also have this mystery connector.
I'm going to look into this intake air temperatur sensor.

 

[4.3Express]

0300 is often from sticking or "pumped-up" lifters. The egr dumps tons of crud into the oil and the hydraulic lifters get stuck full bore leading to valve float, misfire. It ussually happens gradually and eventually your engine looses so much compression it will not run.
It took me forever to figure this out
The valve train on these engines is super weak, the M8 bolts holding the rockers on are way short on threads so whatever you do dont overtighten them or ull strip off whatever threads u have making it into block.
I am in process of making a kit to convert to adjustable studded rockers and solid roller lifters, as this, along with plastic distributor, are biggest design flaws with the 262.

As an immediate fix I would suggest new hydraulic lifters, just prefill them and only tighten rockers lightly, crank engine to pumpfill lifters and then torque to half turn prelash, 20pds or w/e is spec'd. Its a dumb design if you compare to how simple and powerful old VW and small motors with a friendly rocker nose adjuster. I guess ppl thought checking lash once a blue was too much work so GM sacrifices longevity and efficiency

You will also want to roll out those pushrods, if thier badly bowed on some cyclinders those are ones that are not giving lash and floating valves.
Don't try and clean lifters its a waste of time just replace with good qual.

 

[MechBob]

LOL!!

 

[sixsix]

... Don't try and clean lifters its a waste of time just replace with good qual.

OK !!

and what ^^^ said.

 

[mglsite]

If no one has guessed yet it is the plug for the rear hearer solenoid valve that has two vacuum lines attached to it.

 

[gtcfl2010]

I am in the process of putting the engine back together and have found an electrical connector that I can't remember where it goes.
It is part of a three wire harness: One wire comes out of the harness and goes to the firewall on the passenger side. The other two (Black & Black with Grey Tracer) goes to the connector.

I am attaching photos in the hope that someone out there will take a peek under their hood and tell me where the stupid thing goes.

Thanks

Wayne

Hi Wayne
Here's an image of my van 05 astro it's not connected to nothing. So don't worry

 

[gwd]

I agree with MGISITE
It is a heater valve plug.
The picture below is from a 2004 RWD
Good luck getting heat to the back of van with out it plugged in.
Unless of course if you do not have a factory one installed.

.

 

[dchan51360]

I think on my 97 Astro it was used. That vehicle had rear heat and rear AC along with a few other things that I've never seen on any other second gen vans there was a button on the dash related to cabin temp that I've not been able to figure out. That van has long since gone to the JY but seem to recall when I took apart that area of the vehicle to repair a vacuum leak and heater valves, that I was kind of surprised that I didn't see that loose connector. I never traced out the wire to figure out what they were for but I do recall taping and labeling the connectors so that they would get plugged back together in the right place. I would have come across a loose connector at that time.

But yeah, it's an option connector that is not being used on your particular build of van.

Could also be a "option" for upfitter vehicles for them to plug in something specific like maybe an extra fan or blower for an aux heater?

RE p0300 I agree I'd be looking at a dizzy if that has never been changed. If you were digging around that area. one other option might be a loose or open vacuum line. The vacuum canister is stored under that mess too.