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Looses power, idle drops to almost stall. Error code said ignition coil

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Have it properly diagnosed... could be something else!.... don't throw good money after BAD!

Posted on Apr 08, 2011


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Ford truck

im sure you also have a check engine light flashing.its a misfire in one or mor cylinders,the cause is very common the coil on top of spark plug goes bad. but you have to find out which coil.if its running rough at idle strat with #1 cyl and pull injector connector,if there is a change in idle speed then this is the or one of the bad cylinders.if idle drops then coil is good.then just reolace bad coils.

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Check fuel pressure, MAS, TPS, fuel injector.
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you can check here and tells you what these codes mean

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1999 M-B E320 drives great for about 5 or 600 miles then as i'm driving the check engine light comes on and the car looses power and idles rough like it wants to stall.It does not stall though.We

When the check engine light is turned on by the powertrain control module (computer) a fault code is stored to record what it is that caused the fault, in order to begin the process of diagnosis of this problem you have you must have the control module scanned for the stored codes.

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Ram 1500 239 runs about 8 to 12 miles then backfires and looses power let sit a while and run good for acuople more miles before running bag again

It sounds like your ignition coil is overheating. Once it cools down it will fire properly until it gets hot again. Replace the ignition coil and you should be all set.

Feb 23, 2011 | 1994 Dodge Ram

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I am throwing codes PO353, PO352, PO351 on my 2001 Jeep Cherokee Sport. 4.0 2WD. Its saying I have misfires. I was going down the road and the engine just stalled out. It would start right back up and idle...

Greetings john ingall Dec 12, 2016
piggy backers.. old. why not start a fresh post for only your car and not mix up other symptoms.
did play with the CMP or CKP. then cause p1391.
oops...a daisy.... you did it wrong.
Id not attack coil rail until the 1391 is cured, not me.

1: scan it ? post all DTC now.
2: DTCs trouble codes..????
3: is the ASD dropping off line, while running? (a key fact to know)
4: ever get a tune up this decade?????
5: spark gaps correct , to factory spec, and kept here doing repeated service? )
6: Do the scans show the IMMO tripping the ASD off line????
there are 8 reasons for ASD to trip , and cause a stall, all 8 are reported !
there are 50 other reasons for stalls, called misfiring...
the service manual is clear (p035x's)
Peak primary circuit current not achieved with maximum dwell time.
This means that the PCM charged to coil fully
and the current was way too low.
that means it found (out of spec) current.
even zero current,
means coil burned up or the transistors to it.
gee, id have the rail off and check each coil
there are 6 coils, 3 primary and 3 secondary
the SM cover this test, as all do so read it.
it can also be bad connections(wires) to same.
(crude, 5ohm pri, 20k secondary ohms)

WITH 3 COILS inside, and uses wasted spark to fire all 6
and if one coil fails you will loose, 2 cylinders, due to series HV wring, unless 1 wire shorts, but if one opens you loose 2 cylinders.
( Kirchhoff's laws 1; an open in series circuit flows no current, so both spark plugs go dead.

unless rich and super lucky , try using a scan tool
when the engine misfire, or stalls.
and report all errors seen, DTCs, a win/win.
the schematic, see F18 fuse , the coil pack
super simple no? ,yes, but not on PCM end. (Ask)

Oct 12, 2010 | 2001 Jeep Cherokee

1 Answer

2003 ford f 150 4.6 v8 and the idle went from smooth to rough also sputters and sluggish while driving check engine light is flashing.

have the vehicle scanned for error codes at autozone, its free. Post codes for more help....These engines have issues with the COPs (ignition coils-over-plugs) failing prior to 80k miles. When they fail typical problems are: Sputtering under load/acceleration, rough idle, random misfires, random stalling, light or heavy jerking under load (usually at 15-35mph and 45-65mph)..hopefully this helps!!

Apr 28, 2010 | 2003 Ford F150 Regular Cab

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1999 saab 9-5 stalls without warning won't restart for 30-40 min.

Have you check the O2 sensors? How baout cleaning the MAF and Throttle body? Thermostat?

How does the temp gauge look whn it stalls?

Jun 25, 2009 | 1999 Saab 9-5

1 Answer


If manual transmission it sound like a distributer timing problem or engine sensor problem. possible that spark plugs are fowled or coil pack is bad. Take vehical to have inspected with a code reader and get a tune up. or you have bad fuel system or fuel injection problems. There are many issue that can be causing this problem. hopefully this information is somewhat helpful

Jun 03, 2008 | 1989 Ford Bronco II

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