having problems with driveability codes p0351,p0352,p0353,p0354

[whitehurst1]

i have a 1997 mustang gt 4.6 5 spd vert , ok so replaced both oil packs ,crank sensor , cam sensor , the pcm is only a month old from another problem i had , changed plugs and wires last night , the codes listed are
p0351
p0352
p0353
p0354

i dnt know where else to go it has a new fuel pump and fuel filter what am i missing

 

[wmburns]

First. Are you absolutely POSITIVE that the spark plug wires have been wired correctly? Use all factory stand offs looms.

More information:

V8 coil pack diagram

1996 mustang gt dead cylinders - Ford Mustang Forum

1996 mustang gt dead cylinders 4.6L Tech

www.allfordmustangs.com

When you are certain of the spark plug routing, recommend focusing on what cylinders 1,2,3,and 4 have in common. How about:

• The all are on the right side of the motor.
• They share the bank 1 sensor 1 O2 sensor.
• Fuel injectors share a VPWR line.
• They share CAM timing. IE if the cam has skipped time, it would affect the entire bank. Tell us about any other work done. Could be helpful to perform a compression test to determine base motor health.

If this were my car I would use a mechanics stethoscope to "listen" to each fuel injector for the mechanical sound of each fuel injector. If a fuel injector problem is suspected I have had great luck with an injector cleaning and flow test service such as InjectorRX.com. Once cleaned and tested they are as good as new (but cheaper).

Recommend to use an ODB2 scanner to look to see IF both O2 sensors are switching. Here's some information on an affordable Windows based unit.

ForScan ODB2 scanner w ELM327 USB

ForScan ODB2 scanner w ELM327 USB

While working on your car have you ever wanted: to find an ODB2 operational PID value (say fuel pressure or MAF)? How about graph a PID value over time? Or compare multiple PID's over time? Access a bi-directional PCM control such as test a...

www.stangnet.com

Post the long term fuel trim (LTFT) values for bank 1 and bank 2 at idle and at 2000 RPM's with the motor at full operating temperature.

 

[whitehurst1]

thank you yes the 02s are switching , i am going to check injectors tonight , i had not thought that they would cause the pcm to throw a code for the coils ,
i had to change pcm i had a problem with car starting then shutting own three seconds after start , then it showed to only have 20lbs fuel pressure so i hanged pump and strainer , and fuel filter , this coil problem drove me crzy so in a desperate attempt i changed crank sensor ,cam sensor, and both coil packs , now im going crazy ,

 

[wmburns]

i had not thought that they would cause the pcm to throw a code for the coils

I think there may be a mis-understanding. A P300x DTC code means a misfire on the specific cylinder. There are multiple possible causes for a misfire. This is not limited to an ignition problem. Basically anything that could cause a misfire could cause a misfire DTC.

Think FAST.
Fuel
Air
Spark
Timing.

If any one of the above is missing (or not in the correct amount), will cause a misfire.

 

[whitehurst1]

I think there may be a mis-understanding. A P300x DTC code means a misfire on the specific cylinder. There are multiple possible causes for a misfire. This is not limited to an ignition problem. Basically an

Ok I understand that I had just read each of those codes as coil primary/secondary circuit fault

 

[wmburns]

Your are right. My bad.

Any time a DCT calls out a "circuit malfunction" that means there's something soooooooo wrong with the circuit that the PCM is unable to perform any diagnosis. Think. Open, short, ground, break, totally broken device.

Begin by confirming key on power at each coil pack. Use a test light that will "load" the circuit. not a bad idea to also confirm key on power at the fuel injectors. Again a test light is your friend.

Next disconnect the primary electrical connector at the coil pack. From the body electrical connector use the test light as a "noid" tester to confirm a pulse on each of the (4) coil pack circuits while test cranking. Do this for both coil packs. What to do next depends upon the test results.

>>

P0351 Through P0360 - Ignition Coil A through J Primary/ Secondary Circuit Malfunction ​ Each ignition primary circuit is continuously monitored. The test fails when the PCM does not receive a valid IDM pulse signal from the ignition module (integrated in PCM).​ Open or short in Ignition START/RUN circuit Open coil driver circuit in harness Coil driver circuit shorted to ground Damaged coil Damaged PCM Coil driver circuit shorted to PWR

 

[whitehurst1]

ok i have checked all injectors with noid light , they are working properly , and coil has power and pulse , and coils are firing but , if im driving down the road the car will stumble and lose power imagine running out of gas , it misses but only under load , i dnt think it could be a timing chain issue becouse ecm is giving me a circuit code for the entire right bank im losing my mind

 

[wmburns]

i dnt think it could be a timing chain issue becouse ecm is giving me a circuit code for the entire right bank im losing my mind

Always post the full DTC codes for help. There are 1,000's and they each have a story to tell. Don't make us guess when we are trying to help. But if it's the same list, What have you done to work through the original list? It HAS to be wiring related.

AND it's not the entire right side. For a coil pack system the primary circuits are numbered 1-4 which is basically all of them in a coil pack system.

In my experience when there's usually physical damage to account for a wiring problem. A through visual is your friend. Next a test light and a "wiggle test" to see if there are any drop outs.

>>

• Open or short in Ignition START/RUN circuit
• Open coil driver circuit in harness
• Coil driver circuit shorted to ground
• Damaged coil
• Damaged PCM
• Coil driver circuit shorted to PWR