95 Chevy Blazer 4.3 No Start

HI MY NAME IS PERRY AND MY BLAZER HAS DIED ON ME AGAIN !!!
I REPLACED THE SPIDER ASSY. APP 6 MONTHS AGO , ALONG WITH THE FUEL PUMP. AFTERMARKET PUMP COULD NOT SUPPLY ENOUGH PRESSURE SO IT RECENTLY HAS GOTTEN A NEW FACTORY PUMP - NOW AFTER A NEW COIL,MODILE,EGR VALVE,FUEL FILTER IT WONT START UNLESS YOU USE EITHER BUT IT ONLY STARTS THEN FALLS ON ITS FACE AND THE CODE P1351 IS IN ITS MEMORY:banghead:

Welcome to AF.
The code indicates Ign coil module voltage problems.
Clear code and unplug injectors and crank engine and see if code returns.
If so inspect wiring and plugins on ign module and coil.
Next step is a voltage test of the cirucuit.
Could be a bad ign coil module or any thing on wiring or even pcm plug in.
And go easy on that starter fluid.
Safer to use carb cleaner for a start aid.

If it starts on carb cleaner it is more of a fuel deliver problem than ign.
I would ckeck the fuel pressure first thing.
MT
MT

HI MY NAME IS PERRY AND MY BLAZER HAS DIED ON ME AGAIN !!!
I REPLACED THE SPIDER ASSY. APP 6 MONTHS AGO , ALONG WITH THE FUEL PUMP. AFTERMARKET PUMP COULD NOT SUPPLY ENOUGH PRESSURE SO IT RECENTLY HAS GOTTEN A NEW FACTORY PUMP - NOW AFTER A NEW COIL,MODILE,EGR VALVE,FUEL FILTER IT WONT START UNLESS YOU USE EITHER BUT IT ONLY STARTS THEN FALLS ON ITS FACE AND THE CODE P1351 IS IN ITS MEMORY:banghead:i have a friend helping me check the wiring and we removed the upper half of the intake manifold and we are not getting an injector pulse

Is it a PCM or VCM engine.
Is it a code Z or W engine.
PCM computer engine the computer is behind glove box or inside cab.
VCM the computer is under water tank on right side fender well.

Do you have good spark to all plugs and good fuel pressure?

where is it losing injector pulse or where and how are you checking for injector pulse?
At injector or wiring going into intake or at computer?

Have you checked all fuses for 12 volt power on both side?

Check all emc/batt/ign/injector fuses real close

i believe it is a pcm ( computer mounted on the fender well ) and the 8th digit is a W THIS VEHICLE IS DRIVING ME CRAZY . 4.3 L. CENTRAL MULTI-PORT

Tou Wouldnt Happen To Live Near Waverly Va Would You???

I Have Fuel Pressure And Spark , But No Injector Pulse

Where are you checking and how are you checking for injector pulse?

Fender mounted computer is a VCM computer.

Check for injector pulse at connector 2 pin 3 out of VCM.

Have you cleared codes and checked fo any codes coming back?
DO YOU HAVE A SCANNER TO READ OUT rpm SIGNAL OR INJECTOR PULSE?

checked injector pulse at injector and connector with noid light now for the stupid question which one is connector 2 and pin 3.
have cleared codes several times and code p1351 keeps comming back

which connector is #2 black or grey ????

This is going to sound a bit odd, but check in or near your glove box for a fuel injector relay. I have had the same problem for 4 weeks. Mines a 94, but your's should be in the glove box, under it, or behind. Sorry not certain on where.

checked injector pulse at injector and connector with noid light now for the stupid question which one is connector 2 and pin 3.
have cleared codes several times and code p1351 keeps comming back

Does it come back with injector unpluged?

which connector is #2 black or grey ????


Should be stamped on the connector.
Connector does not have any wires on pin 1 or 2.
Pin 3 injector wire is a dark/blue wire.

still at a loss the vcu has 4 connectors black grey red blue none are stamped connector 1 etc...

p.s. i must tell you that i am color blind and my help has left

still at a loss the vcu has 4 connectors black grey red blue none are stamped connector 1 etc...

It is a 32 pin connector with pin 1-2 blank and pin 31-32 blank no wires to them pins.

Does it come back with injector unpluged?

As asked does it come back with injector unpluged?
I would be working on the code if it keeps coming back.
Get the repair flow chart for that code and go threw it step by step.
A factory repair manual or the all data sub.

The all data on line sub has code repair flow chart and should have the VCM pin outs and pin test.
http://www.alldata.com/products/diy/index.html

Also scroll down threw the post there was a link to a free libary lin posted if you want to try it for info.

switched relays in glovebox and wiggled wires under hood and got a pulse for about 5-6 pulses then nothing

Better work on that code.
MT

any body have a mitchell flow chart that they can fax me???? 1-804-834-2749

any body have a mitchell flow chart that they can fax me???? 1-804-834-2749

next time i will buy a toyota:banghead:

i have the same year make and model same code po1351 no injector pulse at times changed everything and still the same code checked all grounds and vcm plugs even ran new wires from control mod to vcm and from injector to vcm and still only a few pulses at the injector at times

i have the same year make and model same code po1351 no injector pulse at times changed everything and still the same code checked all grounds and vcm plugs even ran new wires from control mod to vcm and from injector to vcm and still only a few pulses at the injector at times

Do you need help on yours ?

please

i think the problem maybe in the ignition switch droping out voltage while cranking?

any ideas?

any ideas?


You need to start a new thread /post on yours.
And some one will help you.
Give all info.
Engine and engine code.
What pcm or vcm does it have?
Is it losing spark to or just injector pulse?
MT

thank you will do that