I was driving and the car just shut off and when i went to start it it didint do anything so i checked the spark plugs but they were dry so i checked the fuel pump the egi fuse and they were all good so i tested the injector pulsation voltage and there was no pulsation. What could be the problem any ideas may be of help to me thannx

 

fuse?

 

Check the 15 amp Engine fuse in the interior fuse box. If it were good the Main Relay would click w/key to on. If the relay worked properly w/key to on then the B/Y wire at the leading coil would have voltage w/key to on. Also, the Green check connector near the leading coil w/three wires would have voltage w/key to on at the Black/White wire.

 

the black/white wire will show 12v with the key on at all times and will NOT pulse, the GROUND circuit is the duty cycle signal. if all 4 injectors are getting power then i would look at the control system. disconnect the AFM and try to start the car, if it runs a few seconds then try swapping the AFM. also make sure there is no large vacuum leaks, that the fuel pump is getting 9-11v and that there is fuel pressure. the tach needle should also bounce slightly while cranking.

 

All the fuses and relays are good but what wire i dont now what black and white wire can u explain a little more please im. Kinda slowif u can

 

There's a Green plug near the leading coil that is not connected to anything. It has a B/W wire. This wire powers the ECU. It should have voltage w/key to on just like the B/Y wire at the leading coil. And this is important. What do you mean when you say "the car didn't do anything?" Did the car turn over or not?

 

you said the injectors are all getting power, if so then you either probed the accessible injector clips which each has a black/white wire which is the power feed for all injectors(EGI circuit) and also powers up the ignition coils. this circuit is fed by the main relay in the driver side rear corner of the engine bay.

 

b/y.

 

Ye the is turnng over and now i get it im going to do some more test and ill let you know what i end up with, and no the injectores arent getting any power at all

 

The wire that supplies power to the coils is the same wire which powers the injectors. Have you checked for voltage on the Black/Yellow wire at the leading coil w/key to on or not .

 

HOW did you prove THAT?

One of your earlier threads indicates you have a 88 non turbo car. IF I had a 88 non turbo and wanted to prove I had/did not have power to the injectors.........I'd pull the lead off one of the secondary injectors and prove the plug to see if one of the two wires had batt voltage on it or not. The Black/Yellow wire would be the one with power. The other wire pulses a gnd to the injector from the ECU and might show some voltage from the device internal to the ECU, not to be confused as being the power source of the injector.

No power on the injector plugs black/yellow wire? Check the EGI INJECTOR fuse in the engine bay and ENGINE FUSE in the interior fise box. Check the EGI COMP fuse also while your there.

Secondary injector plugs don't pulse until you reach 3800 rpm with a LOAD on the engine.

If the rpm tach needle makes small bumps while trying to start the car............the EGI COMP fuse is good and the ENGINE fuse is good.

And like the man said, if the black/yellow wire at the Lead or Trai coils has batt power with key ON, then the EGI INJECTOR fuse is good.

Fuel pump runs? Then the ENGINE fuse has to be good is it's stk wiring.

Not a 88 non turbo? Shoulda said what the darn car was in the first place.

 

Ok i checked the 15amp fuse its food, the 80amp main fuse is good, the main relay i clicking when the ignition is in the on position so its good and the the leading coil is getting power at the black/yellow wire butvthe problem now i tht the car doesnt have a spark and its not throwing any fuel too the injectors the fuel pump is good theres fuel in the fuel rails and ireally dont know what the fu&#%*k is happening any more sugestions?

 

Did you check the B/W wire in the Green check connector plug by the leading coil (and this plug actually has four wires total and not three as previously stated). W/the key to on it should have battery voltage. Again, this wire powers the ECU. And try jumpering the fuel check connector and w/key to on the fuel pump should turn on. Also, make sure the CAS connection is a clean and tight one.

 

Yes i checked the grenn wire but how much. Voltage should i be seeing? Because i saw like 2.5 and the fuel pump is good but im actually suspecting the CAS how can i test it?

 

The plug is "Green" in color. The wire is Black/White. The B/W wire should neasure 2 volts w/key to on. 12 volts is the same as "battery voltage."

The White/Blue wire at the engine fuse box is powered by the EGI COMP fuse. Make sure at the Main Relay that this W/L wire has constant voltage (no key). If it does not then check this fuse and or connection at the fuse box.