Question about 2002 GMC Envoy

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There is oil in the coil packs. we are trying 2 change the plugs and they are 100% full of oil

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The valve cover gaskets need to be changed. there are rubber grommets that keep oil out of the spark plug holes that dry out and harden with age. Replace gasket and grommets and oil will stay out.

Posted on Oct 24, 2010

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1 Answer

Oil on coil packs and within the spark plug. When taking out the coil pack I can see oil coming from top going down into the spark plug chamber


if the coil goes into the valve covers i would install new value cover gaskets and that should take care of the oil getting on the coil packs or the coil packs are leaking and then you should change them.i looked up your vehicle and noted that the coils are separate from the valve covers,i would inspect the coils and the valve covers and replace as needed, if you find that the coils are leaking you should change it so that you don't have an ignition problem later, autozone has them for your car around 52each or 250-300a set with lifetime warranty

Nov 16, 2016 | Cars & Trucks

1 Answer

Initial start up the engine sounds like its running on 2 cylinders under powered intil the temp gauge reads normal ???? any body got the answer please


Cold starting misfires can often be caused by either tired high tension spark plug leads or ignition coil packs. If replacing leads, then replace with a full, new set. Coils can be changed individually, but it is often the case that if one has failed, then the others aren't far behind. Some cars have individual coil packs on each spark plug. Some cars have a single pack for all plugs and some have coil packs which may control two or more plugs.

To check for a misfire (ignition failure) follow these steps:

(Cold start) (Use a pair of insulated pliers)

1) Start the vehicle

2) When the vehicle starts misfiring, disconnect plug leads or coil pack connections one at a time. If the vehicle idles even more roughly, then that plug or pack should be considered fine.
Replug each connection before disconnecting the next one. Once you disconnect a plug lead or coil pack connection and find no difference in poor engine running, then you have likely found the offending cylinder. Check the spark plug condition, lead and/or coil condition and connections on that cylinder.

3) Replace components as necessary.

Oct 12, 2014 | Cars & Trucks

1 Answer

Hesitation when accelerating


If it does this only when warm then it may be the coil pack. To prove it you can warm the car's engine up and when the problem occurs, stop the engine and remove the coil pack. Place it in a bag if cool enough and place in the freezer, ensuring it can't get wet! Once cool, replace the coil pack and start the engine. If it's fine for a minute and then plays up, it's almost certainly the coil pack.

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Here's a link to your code.

May 29, 2013 | Cars & Trucks

1 Answer

Bravada coil


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1 Answer

How do I change the spark plugs on a 2007 5.7 hemi engine?


2 plugs per cylinder "I guess that makes it exotic"

You will need 16 plugs. And they come OEM with copper. Plat plugs do not give you better performance. They just last a little bit longer and cost more money.

take the 4 torc screws out of each coil pack.

Unplug the coil pack.

Pull the coil pack straight out. Turn it over and check for cracks. "For all 8 it will cost you 400-600 dollars"

Plugs are down in the holes your coil pack tubes just came out of.

Change them the same way u would pull any other plug.

Check the plugs for fouling or oil. You may have to change your gaskets. They sell a valve cover gasket set with plug tube gaskets for 30-50 dollars.

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2 Answers

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injector
that was what mine did started with misfire on #4 then went to #1 so replace them or that one that is # 4 almost 100% that is whats wrong

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1 Answer

When idling my 2003 Acura TL the engine seems to want to almost die, also when i got on the freeway it seem to pull hard and **** like it was having trouble shifting into 5th gear. It also seems to run...


You may need to change the coil pack(s) or modular. The modular is what the coil pack(s) mount to. I'm not familiar with that engine so you may have a 3 piece coil pack, or a 1 piece. (If it doesn't have a distributor). You may first try replacing the coil wire. There is a good chance that is loose, or bad. It could also be the coil itself. Try the coil wire and if it still acts up, then try the others. Also, when you changed the plugs, did you put new plug wires? When I do a tune up on my vehicles, I change the plugs, wires, distributor cap and rotor, (coil pack,modular), whichever is equipped, oil, oil filter, tranny fluid and filter with gasket, valve cover gaskets, oil pan gasket oil filter, and fuel filter. Try changing the fuel filter as well, as plugged or dirty fuel filters can cause stall outs. I hope this information helps. Thank you for choosing fixya.com for answers.

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2 Answers

Yes, I change the injector and spark plug. I also switch the injector and spark plug. Still show the Cyclinder #2 Mis-Fire. What does the Ignition Control Modual do to a car if going bad?


that car has a coil on plug set up change the coils over and see if the fault moves,i have never changed an injector .its nearly always the coil pack

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