Question about 2002 Ford Thunderbird

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Bad Coils on 2002Thunderbird - how much to fix

How much should I pay for testing the bad coils?

How much should I pay to have the Bad Coils replaced?

I live in Orange County California

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  • aniz Nov 15, 2008

    thanks robynumber1 but is that for diagnostic or for diagnostic and repalcement for the 8 coils? and how much should i pay for each coil part?

  • aniz Nov 15, 2008


    From your description, it seems like it is a transmission concern because if you had a coil concern, it would be missing. If it's "banging" going into drive, then into reverse, you may have a hydraulic concern with the solenoid pack inside the transmission. There also may be a callibration update for this concern. There is an adaptive learn strategy for shift timing and feel, but that usually is when the battery is disconnected or loses power. The PCM relearns the adaptive strategies. The cost of repair depends on what is found with diagnosis. This is all assuming the transmission from your description is the cause. If you don't want to go back to the dealer, I am sure there are other trans repair facilities that can perform the needed diagnostics. I hope this answers your questions and the info was helpful. Let me know if further advice is needed. Please accept answer and give feedback. Thank you.



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Well i dont know the labor rate in orange cnty cali so based on your description i would charge roughly 2.5 hours * the labor rate.

Posted on Nov 15, 2008


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2 Answers

Why do new spark plug coils go bad ?

coils, it has just one coil pack. with 3 coils integrated.
its not COPs.
there are many DTCs related, and not posted.
did you try new spark plugs, then new wires. and then only last the coil pack? check compression.
is it failing the same cylinder? (the will fail in pairs, if the pack is bad)
the pack runs 2 cylinders at once (in series)
injectors leaking or clogged.
since you didnt show the symptoms, i cant help much.

1 month or 1 year?, or how many miles?
answer 1
time, heat,vibration, oil contamination. (pressure washing them)
not using the dielectric grease on the boots.
getting water in the wells over and over, causing flash over , and carbon tracking.
what make you think they are bad.???
my guess, is you see P03xx codes and assume the means bad coil.?
post symptoms.
post scan data, and DTCs.

May 21, 2014 | Jeep Cars & Trucks

1 Answer

Cylinder misfire coil

These engines have 3 coils and are paired 1 and 4 2 and 5 3 and 6 with a spark noid run to see if the paired cylinder has no spark if so remove coil from module and test the power supply to coil and with a logic probe test the trigger side if blinking with no spark your coil is bad. not blinking replace module.

Apr 17, 2014 | 1994 Buick Park Avenue

1 Answer

My 2005 jeep 4.0l has dtc 2302 , hesitates, replaced pcm still has code

replacing PCM is the last, why do that. which jeep,? wrangler? GC?
ECU is not bad and is almost always (GIGO) garbage in ,nets garbage out, now and for ever....
all most all errors are
1: input errors.
2: or bad output actuators or gee the engine it self.

now lets work
ever see this>? or the FSM, the FSM book is way cheaper than any knee jerk ECU swap.. ouch.
out of FSM. actual
PCM (last ) never 1st ever....
so the coil pack is 4 pins and 3 coils, one one is hot key on.
the other 3 are 3 coils, coil 1 is bad,,
from a pure tech stand point its.
1: bad coil (open or shorted) bad wires, open or shorted or bad ECU.
we never condemn any ECU unless we do the simple lamp tests.
etc. case in point below.
here are the FSM steps, so easy to do.... (truncated, read your FSM)
1: coil 1 removed, connector.
key on is pin 2, 12v, if no fix that first. ( bad power distra. or fuse)
yes, 12v. so.
then, use a test lamp to pin 3 and ground
Pin 3 is COIL 1, !
crank car , does light flash? (any small 12v lamp works) 0.1 amps are less.
1: yes, flash PCM good, coil bad.
test lamp tests continue....
2: stuck on lamp , wire is grounded out or bad PCM (pull PCM C2 conn, ? still tuck on?, yes, bad harness !
3: stuck lamp off? . this is harness wire cut or PCM bad.-
check continuity end to end on this wire. if good , bad ECU.
on a car with nice clean harnesses, no damage to conn?
its a bad coil.
the coil can in fact can be bench tested...
that to, is in the books.
(ohms tests, and make real spark) do so but do not exceed max dwell on the coil "smoke tested boom."( you need a pulse generator , or coil tester)
easy to make them .
there you go.... ECU last. for ever and ever.....

Sep 27, 2013 | Jeep Cars & Trucks

1 Answer

2002 Ford Escape V-6. Originally blew out the ERG. Took it to a shop and had them inspect the cats. They advised rear cat was plugged but the fron 2 were ok. Replaced Cat, Muffler, Plugs, boots and...

You have several bad COP Ignition Coils

The whole approach to solving your vehicle was wrong

I would have done a cylinder leak down test to check engine
mechanical integrety valves etc

Next, new spark plugs & at least the back 3 coils,
assuming you have a V6, because the intake has to come
off to do the plugs

Install the upper intake,smoke test for vacuum leaks,
test & replace all oxygen sensors & all cats,checked
all data,mode #06 misfire counts,fuel trim on a road test
& much more

eg. just go thru the entire motor & fix it all

Some what similar with a 4 cyl

Not saying you neglect the vehicle, but it is not
new & doubt any shops have done much more
than break down repairs over the last 11 years

I'm seeing many or thousands of vehicles just on this
site, ruined from only driving them & never working on
them, because of lack of knowledge & why not, their
bank owned anyway,who pays cash or keeps them
18 years as I do

Mar 03, 2013 | 2003 Ford Escape

1 Answer

Po304 po307, i think my engine coils keep going out i also have a po420 code

You may have 1 bad coil not both #3 & & #7

You also have a bad exhaust converter from 10
years of on & off misfires

The PO420 is (Bank 1) Passenger side

Fix the misfires

Replace both Converters

Replace all 4 O2 Sensors

Converters should have lasted a few more years

A cop ignition coil is $59.00 & takes about 15 min to put in

No reason to pay someone $500.00

Jun 17, 2011 | 2000 Lincoln LS

1 Answer

Replacing throttle body and pinion seal

You first want to stay away from a dealer
I see you paying $1500 min and nothing being fixed,
and your in and out milage will be the same. Never driven
vehicle. That is what they do. Not much

You have an ETC,Electronic Throttle Control type throttle body.
It has a replaceable TPS Sensor and a Motor which is not.
It is a drive by wire vehicle. Three switches on your gas pedal,one two pole
TPS on the throttle body
I assume your MIL Lamp is lite on the dash and a P2104 thru
P2111 codes. They can be set by bad COP Ignition Coils
The coils on fords and lincolns have been bad for about 15 years now

A coil if really bad, spikes the PCM (computer) and that signal comes
back on the TPS. The PCM gets confused and puts you into failsafe or other
driveability issues. Thus the TACM 2105,2106 etc codes

So it is unlike that the TACM,throttle actuator control motor failed,but the dealer
will put one on anyway. The coil issues will not get resolved, because they will
say it passed an in shop load test. Of coarse it did. You need to drive it.
Remember they don't road test.

On your way home,guess what,the check lite come on again.

Let me know if you have codes

Any shop can do a pinion seal

You can get codes read at parts store
any PO301 thruPO308 is a bad coil The last # is the cylinder

1,2,3,4 Pass Side
5,6,7,8 Driver side
Front to back

Nov 30, 2010 | 2005 Ford Expedition

1 Answer

Is it unusual to have all eight ignition coils go bad at once. Is it complicated to replace them on your own. How do you test each coil to see if it is bad? Thank you

The easiest and cheapest way is to go to a shop wherethey use scopemeter testing.

The DIYer's way is to get the shop manual buy a spark tester and do exactly what the manual and the testers manual tell you to do to measure for spark.

Another DIYer's way is to buy a coil pack and swap it out for a bad one and then test for spark.

Not likely that all coils went. Ignition module is a common for all coils and so is battery and ignition switch.let me know how you make out.

Apr 29, 2010 | 2004 Jaguar XK8

1 Answer

Why when you take your 2003 expedition to dealership they only change the bad coil i purchased my 2003 expedition at omeara ford center in colorado and replaced three coils already wouldnt it be wise that...

Warrenty will only pay for defective parts,so if they put all new parts in then when they are reviewed the company would only get paid for the parts that failed.If the part was defective when you brought it in then warrenty covers it,if not then you cover it unless it becomes defective while you still have warrenty.

Nov 17, 2009 | 2003 Ford Expedition

3 Answers

1995 buick... steadily misses..

Just went through the same thing - change out the coil packs, one at a time. Coil packs run $30 - 50.

Nov 15, 2008 | 1995 Buick Riviera

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