88 BII will not stay running

[wildboar]

Hi, I am new to forum. I just bought my son a 88 BII 2.9 4x4 5 spd. The problem is that it will not stay running or it will not start at all. The previous owner has replaced the fuel pump and the injectors. It seems it wants to start (sputters a little bit) The previous owner thinks its an electrical problem. Anyone have any ideas or point me in the right direction.
Thanks

[djadjective]

I experienced this problem when my Ignition Module started going out and knocked my timing way off to the point where it would sputter for a minute till it would finally turn over and run like crap and then die if i wasn't giving it any gas. I would have your module checked, and also check your timing, distributor cap and rotor, plugs, and fuel pressure just to make sure its all working.

[wildboar]

Great... thanks iil give it a try

[wildboar]

ok i have checked both fuel pumps and filter, I had my son crank it over while i sprayed starter fluid into the TB, it started and ran until i stopped spraying the starter fluid. Now i am leaning towards whatever controls the injectors. Is there a way i can check to see if the injectors are getting voltage?
Thanks

[tekatlarge]

In looking over this thread I see two Glaring examples of shotgun trouble shooting.

I am not trying to be mean or an ass but I see this every day. I see people hoping to just swap something, anything to try and fix their vehicle.

Basic troubleshooting thrown right out of the window. I see people ignoreing pulling codes or running basic key on key off tests.

Finding the problem is cheep and easy if you use what you have between your fenders. (thought I was going to say head didn't you).

Another thing I see day after day is people trying to fix a problem with out any documentation like a book or something. How do you pull codes? How do you check fuel pressure? What should I do first? How are these injectors wired? Where is the voltage sources? All that information is right there in the Book! The book is the cheapest tool in your arsenal of tools!

So my answer is:
1. Get a book or go to an online book. there are several no cost sources of info. Don't rely on you uncle Steve cause what he remembers from memory may not be accurate.
2. Pull Codes
3. Run Koeo tests
If that don't help go back to your roots? Basic 3 of trouble shooting. Air. Spark. Fuel.
Now that you know it is not getting fuel you first do a pressure test at the Schrader port.
got pressure? ok next check to see if you have any volume. open the port put a hose on and route to a tin can. Turn the key on and determine a good strong flow of fuel.

The computer controls when to fire the injectors. If the injector doesn't fire then it is likely a computer problem. The computer is sensing a condition that says stop!

Ok I went as far as needed to give you a big boost to finding the problem. Get your book out.

One last tid bit is to check the vehicle rollover switch. Located on the passenger toe board under the dash.

good Luck and Good day!

[wildboar]

I have checked for 12v at the injectors with the key on the on position and there is no 12v

[tekatlarge]

Ok here is where having a book or online info is critical...

I just went to auto zone looked up 88 B2 and had the wiring diagram for the injectors in about 2 minutes.
I just took a quick look and your injectors get the 12Vdc from the main EEC relay. If that relay is bad that could cause the problem. I also noted that the line supplying the 12Vdc had a Fusible Link in it. According to the wiring diagram that fusible link is 20 ga Blue fusible link. If there is a problem I would check the fusible link first. then I would look at the main EEC relay.

BTW: the Red wires on the injectors are the +12Vdc

I don't mean to seem to be picking on you or anyone else but this is a place to learn as you go and I like to try to guide a person to the solution rather than just saying replace the relay or the link.

So based on what I told you take a look and tell me your results. That is if you still want to talk to me..

[vabronconut]

look at the chilton and find the wires that go to the injectors from the eec. its like a 72 pin plug. from this connector find the ground for the injectors. disconnect each injector and put a jumper wire to connect the two pins then using a ohm meter check to make sure there is not a open or short in each wire. if wires are ok i would check the operation of the eec relay, a simple voltage check to make sure there is power on the input side while in run and power on the output wehn in start. if power check is good then, check grounds to engine, and by the eec..

oh yeah i forgot did you check the inertia switch to see if it was popped?

[wildboar]

Thanks to all for their help. I found the problem. It was the red wire going to the injectors was burnt, so I just spliced in a new wire and bingo started right up