Please Help Stumped On This One

[jas7865]

I have a 1996 S-10 with the 4.3 V-6 and I cant get it to start, checked the fuel pump via the little red wire, it seems to be working, but I still am not getting any fire at all and the fuel pump wont come on when the key is turned on, heres what Ive tried,Ive replaced module and coil, what else can there be with these symtoms besides the PCM Ive run my scanner on it and came up with an error not a code just says Err the only thing that I havent changed is the little electronic piece inside the distributor, and I have checked all relays in the glove compartment,PLEASE HELP I AM AT THE END OF MY WITS WITH THIS TRUCK!!!!!!!!!!!

[mike1224]

ok, the err on the scanner: make sure you have a fuse into the the cigarette slot. after that, i hope we can be more help

[jas7865]

what do you mean fuse in the cigareete slot???????????? If your talking about my scanner as far as powering it goes,it runs off batteries,and all fues are good checked everyone. MORE HELP PLEASE

[rlith]

Have you run a pressure check on the shradervalve? And if you're sure you're not getting spark, check both your coil and your crank position sensor.

[jas7865]

can only get fuel pressure if I stick 12 volts to red wire on fender well for fuel pump

[maxwedge]

Checked the main pcm fuses? Is the pcm powered, does the security lite stay on?

[jas7865]

Originally Posted by maxwedge

Checked the main pcm fuses? Is the pcm powered, does the security lite stay on?

The 2 fuses Ive checked, I think there the 9 and 10 position in the fuse box they appear to be good. Where is the security light your referring to and would the crank sensor or cam sensor cause the coil not to put out spark or activate the fuel pump when key is turned on?

[maxwedge]

Security lite is on dash, look specifically at the pcm and fuel pump fuses, the crank sensor would not affect fuel pressure only injector pulse and spark. This err when the scanner is hooked up needs to be corrected, so you can get a scanner on it and check to see if the pcm is powered and you see cranking rpms, check for power to the pcm fuses, could be an ign switch or feed problem so the pcm is unpowered.

[jas7865]

update to my problems there is no power to the ignition system at all I put a testlight at the fuse location 9 or 10 cant remember ,but I have no power to that fuse port at all with the key on or off could this be the pcm? or am I barking up the wrong tree ,the truck turns over fine PLEASE HELP

[maxwedge]

You need a wiring diagram now, these fuses if they are for the pcm are powered by the ign. switch check for power into the switch and power out when the key is turned on. You keep blaming the pcm, it is not in the loop for powering any of these systems, it is powered by the ign switch then the fused circuits, again a wiring diagram will clarify what you are looking for here.

[Fireplug]

check the ign switch!!!