Question about 2007 BMW 525xi Sedan

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1995 BMW525i hesitation at city speeds. Check coil to plug spark?

Replaced plugs and the problem went away but came back in 2 days. replaced coil to plug boots but not plug with no change. Can I check the coil ? Car runs good at highway speeds.

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  • bfg3 May 11, 2010

    if it hasnt set a code, triggered the engine light, I would change the fuel filter. but if the light is on and you have read the code then you are going about it the right way. the only way I know to check coil is to replace with a good one due to too high of voltage to check with a volt meter.

  • Anonymous Mar 31, 2014

    After changing spark plugs and coils vehicle runs great. Check engine light will not reset.

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  • 39 Answers

Check your distributor cap for wear
check plug wires
try a can of "seafoam" in your gas tank

Posted on Jan 12, 2009

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1 Answer

Rough idle and hessitant when accelerating


Did you clean out spark plug wells? Sometimes when removing intake, coolant leaks into spark plug wells shorting out spark to cylinder wall instead of plug..check for coolant traces on coils.Could have weak coil.

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2005 jeep liberty engine misfire cylinder 5


A code P0305 may mean that one or more of the following has happened:
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer


If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Nov 20, 2011 | 2005 Jeep Liberty

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I have a 2001 ford escort I was having some problems with being able to pick up speed and sometime when the car was hot and I came to a complete stop with will die and not start for a while. we started...


Dear sir
PLeas place back old ignition coil, if you getting this problem after long run or after car gets hot, it is problem of fuel pump ,if pump motor is faulty , then it can cause problem in hot condition , replace fuel pump your problem will solve. thanks.

Sep 07, 2010 | Ford Escort Cars & Trucks

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My 2003 ford expedition reads a code 0303= 3 cylinder misfire, which side of my vehicle would that be on and could replacing ignition coil and spark plug fix it and stop the lose of power and hesitation?


Third cylinder back on the passenger side. I'd recommend changing all 8 coils and spark plugs. These coils don't last long, and once one goes, more will fail soon after. This job also requires removing the fuel rail to gain access to the coil and plugs. I personally have the same SUV and went through the same issue!!

May 08, 2010 | 2003 Ford Expedition

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Check engine light


A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.

The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors. 

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner. 

Jul 02, 2009 | 2004 Dodge Ram 1500

1 Answer

Low idle and hesitation when driving


i had a similar problem, with a different car though, and it turned out that the seals in the fuel pumps had been eaten away by the ethanol in the fuel i was using. i had the fuel pumps replaced as well as the filter and switched to a different fuel that contained no ethanol and i haven't had a problem since.

Jan 29, 2009 | 1995 Nissan Altima

1 Answer

94 Park Ave Ultra intermittent 'check engine soon light' comes on


It sounds like one of the ignition wires is breaking down or possibly a coil. Get a squirt bottle of water and spray a mist on the plug wires and coil to see if a spark starts to jump out. Probably just a bad plug wire.

Dec 10, 2008 | 1999 Buick Park Avenue

1 Answer

Cranks but will not start.


Ignition coil or distributor cap. Not knowing the Avenger I couldn't tell you where to find either but follow the HT leads from your plugs and you should find them. If you aren't getting a spark on any plug then the perp is your ignition coil and it'll need replacing, if you're getting a spark on some then it's the dist cap, check the contacts and give them a clean and see what happens. F.Y.I. the dist cap is the first thing back up the line from your plugs with all the HT leads going in, and the ignition coil is after the dist cap.

Nov 09, 2008 | 1995 Dodge Avenger

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