Knock

[Alaskabuick]

Thanks Razor,

Yes she is banging away. I 1st need to see what is the problem with the exsisting system. It has a Paxta-map-fueler, this is similar to a 7 inj. system but appears to have 2 injectors. I found many vac leaks in the line supplying this with MAP. Now I need to see if it is actually triggering the injectors. I have heard their have been problems with these units and they dont make them any more.

I call paxton and they were not a bit of help. They just said it was a discontinued item and end of story..

If it is not working, could I not just put a hobs swith in line to trigger the injectors at the desired boost? Do the injectors take a certain type of current or special signal. Just curiouse if it would not be a simple pressure controled swithch to fire these.

Their is also a another paxton controller box hooked into Manifold pressue that i suspect is some type of timming retard system.

This is a whole new ball of wax for me so I am not that up on this, just using my buick knowledge to trouble shoot this.

Dennis

 

[Razor]

Well a fuel injector is driven differently than a pump.

Sounds like its like an ATR 7th injector. Whereby you setup the boost for it to kick on and then the pulse width. In other words you cannot hold 12 volts across an injector else you'll cook the coils.

Unfortunately theyre not solenoids you can apply 12 volts to.

Sounds like Paxton must of had great success with the piece. I'd tell you to start investigating doing bigger injectors for the proper fueling and ditch that POS.

Good luck in getting it working.

 

[Alaskabuick]

Injectors

Ok that answers my question, it takes a special pulse for the injectors to fire correctly.

You know, I have a ATR 7th injector set up that I took off my car. I wonder if I could wire the controller in to fire the injectors? They are the same style injectors from the way they look?

I better see if the paxton system is even working or not, I will test it this weekend.

The way I was going to test it, is to pressurize the line to the unit with 5-10 pounds of air. Then put a test light on the leads to the injectors.
Do you think this is the proper way to do this?

Thanks

Dennis

 

[Razor]

You can get a NOID light at any autoparts store for testing fuel injectors. It plugs rite into the injector plug.

Maybe you can use the ATR to drive those injectors. To switch it on, simply bypass the pressure switch connections.

 

[Alaskabuick]

NOID

Is this for checking the Injector or the current to the injector?

Dennis

 

[Razor]

Its a lite bulb that plugs into the injector socket. In other words, you unplug the wire from the injector, plug the bulb in place of the injector.. if the bulb blink's' then there is current on the wire. It doesnt check your injector, only a flow machine can do that.

 

[Alaskabuick]

INJ

Ok,
Thanks Razor.

That is what I thought, this should be easy to check.

I just pulled up some trouble code with ecm at my friends shop. Looks like I need to sort out the ECM. I think maybe the boost retard module may be haywire and playing hell with everything.

Think I will unhook the paxton stuff and start fresh with stock configuration. Verify that the inj. are pumping if not fix them with my ATR controll unit.

After this I will look at the timming. Would like to find a repetable timming retard set up. I have seen some programmers that plug in to the ford ECM. This may be an option.

Dennis

 

[pacecarta]

as razor mentioned you can plug noid lights into the harness to verify injectors are getting signaled to pulse to diagnose the harness and ecm , the noid is a resistored lamp that wont hurt the ecm as it suimulates the load of an injector

if you are just looking to verify that the injectors are operational there is a tool that will simulate the ECM signal pulse to one injector at a time to verify operation , combined with a fuel pressure gauge you can monitor pressure drop at each injector and when compared to the other injectors the diferences in pressure drops weed out a stuck or poor flowing injector .
as you mentiod you could apply pressure to the contoller with the engine idling and you should be able to hear the injectors pulse , they should make a clicking noise but that wont verify that they are actually spraying,

as far as spray pattern only a bench tester can verify proper spray .

the bigger question is why bother running a 7th injector , they were used back in the day when injectors larger than 28lbs werent available , by adding another injector it helped the fuel supply problem , nowadays with the enormous injectors available only after you managed to max them out would you need to consider adding a 7th

 

[Alaskabuick]

many choices

Thanks for the help, this is really getting me on track.

You right about bigger inj avilable now but since it has the system already in place I would like to get it working. I dont think the problem is in the injectors but the controller. Paxta-map-fueler
and a control unit by paxton called the EGO control module.

I called paxton, wich is now owned by Vortec and they dont have an info or records on this system. They wanted to help but a change of ownership lost all old info.

However I did stumble onto a company on a search that I think may of manufactured these items for paxton. Here is their website: www.splitsec.com This looks exactly like what I have on the car. It is the weekend now but will call them tommarrow.
They have some neat stuff.

It would be nice to just get the exsisting system working correctly.

You have to understand, this is my wifes grocery getter and not my turbo. So I just want it to run good, not trying to set low et.

One problem that will never go away is we only get 90 octane up here. Im sure I will have to go with a alcohol inj if I ever want to stomp it hard, or a really really retarded chip, less boost?

Bear with me their is not even a boost guage on this thing? Hell, maybe someone slapped a bigger lower pully on it an it is putting out 20 pounds? Dont really thing so, I talked to all the owners and they would of told me this.

-30 below zero today, maybe I will take the tubo out...yea right!

Dennis