1997 Ford Thunderbird no fire for coil on cyl. 3& 5

Tiny
WAYNE 9
  • MEMBER
  • 1997 FORD THUNDERBIRD
  • V8
  • 2WD
  • AUTOMATIC
  • 160,565 MILES
I have a 1997 t-bird, that has no fire coming from companion cylinders 3&5, I changed coils and the problem still there. I was told it had a ign. Control unit, but found out the 1997 bird doesn't since it is a dis system, since the computor works all of the engine could it be the computor, I have checked everything and cannot figure out why cylinders 3&5 won"t fire your help would be reaaly great. Thanks wayne
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Friday, September 4th, 2009 AT 11:29 AM

7 Replies

Tiny
IMPALASS
  • EXPERT
Hello -

Wayne, I am going to do some checking but thought I would also suggest while I do that to please go to Auto Zone (AZ) or O'Reilly's (OR) and use their tool check out program and get the code scanner. Check your codes, if you find something and you don't get it fixed and need to get back with us, please make sure you tell us exactly what the code was, number and all. Example, if the code was E0568 O2 Sensor bad. Then make sure you give us all of that.
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Friday, September 4th, 2009 AT 12:40 PM
Tiny
WAYNE 9
  • MEMBER
I have a scanner and was a chrysler tech for yrs. It had a code of p0352 low voltage on the secondary circuit, thanks for responding so fast. Wayne
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Friday, September 4th, 2009 AT 2:07 PM
Tiny
WAYNE 9
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I also have the manual but it didnot show any other systoms other than low voltage thanks
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Friday, September 4th, 2009 AT 2:09 PM
Tiny
IMPALASS
  • EXPERT
Hello -

Hi Wayne. Sorry for the delay. Minor technical difficulties. Is your engine a 3.8L or the 4.6L
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Friday, September 4th, 2009 AT 8:00 PM
Tiny
WAYNE 9
  • MEMBER
Thanks folks, the engine is a 4.6 lt v-8 what problem did the code p0352 give besides low volyage on primary, and secondary coil say, by the way the coil that is not firing on 3&5 is on the right side of the engine. Thanks wayne, p.S. I would donate more but I am disabled and I just can't afford it. It is folks like you that makes America THE LAND OF THE FREE AND THE COUNTRY THAT HELPS EVERY COUNTRY IN THE WORLD. THANKS AGAIN

updated 9/30/09
thanks for the help gentlemen, I worked several hours just with a test lite, and finally just pulled the pcm out ordered a new one from autozone, and installed, now everything works great even the emissions are in the green on my code reader. I can't thank you'll enough. Just keep up the good work. Thanks a million. Wayne
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Friday, September 4th, 2009 AT 8:09 PM
Tiny
IMPALASS
  • EXPERT
Hi Wayne.

It looks like you need a Breakout Box and Diagnostic Harness to do the tests I have. I figured this. I am going to attach the tests anyway then keep looking.

Since you are a mechanic kind of go through the tests as I will too and I will also look at the electrical. Maybe togher we can see something without using the box/harness. My first glance it looks like the PCM but want to look around some.

Have some problems with the system tonight so please be patient with us.

P0352 Ignition Coil B Primary/Secondary Circuit Malfunction

1. 90) DTC P0350, P0351, P0352, P0353 & P0354 Using a spark tester, check for spark at all spark plug wires while cranking engine. If consistent spark is present at all spark plug wires, ignition system is okay. Go to step 50) of CIRCUIT TEST Z. If consistent spark is not present, go to next step.
2. 91) Check For Spark At Right Spark Plugs If spark is present at right spark plugs, go to next step. If spark is not present at right spark plugs, go to step 108).
3. 92) Check Left Spark Plugs & Wires Turn ignition off. Check left side spark plugs and wires for damage or wear. Check all wiring harnesses and connectors damage, burned insulation or poor connections. Check sensor shield connector. Repair or replace as necessary. If no faults are found, go to next step.
4. 93) Check For COIL PWR At Left Coil Turn ignition off. Install EI Diagnostic Harness (007-00059) to Breakout Box (014-000950) and ICM. Use appropriate overlay. Connect left (Yellow) coil tee. Connect diagnostic harness negative lead to battery negative terminal. Leave positive lead disconnected. Set diagnostic harness box type switch to 8-cylinder position. Turn ignition on. Measure voltage between breakout box test pins J11 (COIL VBAT) and J7 (B-). If voltage is 10 volts or more, go to next step. If voltage is less than 10 volts, repair open in COIL PWR circuit. Clear PCM memory and repeat QUICK TEST.
5. 94) Check C3 Circuit At Coil Pack Turn ignition on. Measure voltage between breakout box test pins J10 (LC3C) and J7 (B-). If DC voltage is more than 10.0 volts, go to next step. If DC voltage is 10.0 volts or less, go to step 102).
6. 95) Check C4 Circuit At Coil Pack Turn ignition on. Measure voltage between breakout box test pins J18 (LC4C) and J7 (B-). If DC voltage is more than 10.0 volts, go to next step. If DC voltage is 10.0 volts or less, go to step 104).
7. 96) Check C3 Circuit At PCM Turn ignition off. Disconnect PCM wiring harness connector. Inspect pins for damage and repair as necessary. Install a second EEC-V Breakout Box (014-000950). Connect PCM to second breakout box. Turn ignition on. Measure voltage between breakout box test pins J7 (B-) and test pin No. 78 at second breakout box. If DC voltage is more than 10.0 volts, go to next step. If voltage is 10.0 volts or less, repair open in C3 circuit.
8. 97) Check C4 Circuit At PCM Leave ignition on. Measure voltage between breakout box test pins J7 (B-) and test pin No 104 (LC4) at second breakout box. If DC voltage is more than 10.0 volts, go to next step. If DC voltage is 10.0 volts or less, repair open in C4 circuit.
9. 98) Check C3 Circuit At Coil Turn ignition off. Disconnect left coil from diagnostic harness coil tee. Turn ignition on. Measure voltage between breakout box test pins J10 (LC3) and J7 (B-). If DC voltage is less than 0.5 volt, go to next step. If DC voltage is 0.5 volt or more, go to step 106).
10. 99) Check C4 Circuit At Coil Leave ignition on. Measure voltage between breakout box test pins J18 (LC4C) and J7 (B-). If DC voltage is less than 0.5 volt, go to next step. If DC voltage is 0.5 volt or more, go to step 107).
11. 100) Check C3 Circuit At Coil While Cranking Connect positive lead of EI Diagnostic Harness (007-00059) to battery positive terminal. Connect incandescent test light between breakout box test pins J1 (B+) and J10 (LC3C). Crank engine. If test light blinks brightly once every engine revolution, go to next step. If test light does not blink as indicated, replace PCM and repeat QUICK TEST.
12. 101) Check C4 Circuit At Coil While Cranking Connect incandescent test light between breakout box test pins J1 (B+) and J18 (LC4C). Crank engine. If test light blinks brightly once every engine revolution, replace cylinder No. 2 coil pack and repeat QUICK TEST. If test light does not blink as indicated, replace PCM and repeat QUICK TEST.
13. 102) Check Left Coil Pack Turn ignition off. Disconnect coil from diagnostic harness coil tee. Measure resistance between breakout box test pins J10 (C3C) and J7 (B-). If resistance is less than 2000 ohms, go to next step. If resistance is 2000 ohms or more, replace cylinder No. 2 coil pack. Clear PCM memory and repeat QUICK TEST.
14. 103) Check C3 Circuit Leave ignition off. Disconnect PCM wiring harness connector. Measure resistance between breakout box test pins J10 (C3C) and J7 (B-). If resistance is less than 10,000 ohms, repair short to ground in C3 circuit. If resistance is 10,000 ohms or more, replace PCM. Repeat QUICK TEST.
NOTE: If C3 circuit is shorted to ground, coil damage may occur.
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Friday, September 4th, 2009 AT 8:10 PM
Tiny
IMPALASS
  • EXPERT
Wayne thanks for the info. That is the only thing we show is

P0352 Ignition Coil B Primary/Secondary Circuit Malfunction

No worries on the amount of donation my friend. We will do what we can to get you going.

A lot of great folks here at 2CarPros. It is because of kind folks like you that make it worth it. Okay. Back to the books.
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Friday, September 4th, 2009 AT 8:35 PM

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