Check ecm. How many miles?

 

NOT EVERY FRICKING PROBLEM IS DUE TO AN ECM. It's probably just a coil pack or injector. Just because that was yoru issue doesnt' make it everyones issue. good grief charlie brown

 

ecm? what is that?

60K miles

 

ecm? what is that?

I know, I am an idiot

 

Na man, it's all good. The ecm is the electronic control module. My car started to act up bad and threw a bunch of codes for cylinder 5. They checked all, and my ecm was bad. They said around 65-80k miles they seem to go out regularly. Def check the plugs, coils, wires, but I bet it's the ecm. They are known to go bad after a bit.

Here's a pic of my new ecm they put in and its location. It's the new shiny piece with the hoses on it. They are not cheap and I believe have to be programmed. My bill was $1100 if I did not have coverage. OUCH!!

 

And I bet that was mostly for the part, because that doesn't look all that difficult to replace.

 

Thanks!

 

Hello all,

Its an amazing forum. I got the same trouble with my CTS 04, 3.6l. I like to work on it as i have to save money which is a lot when it comes to dealership.

Its throwing up the codes for misfire cyclinder 6. I did the same changed plugs original ones AC Delco. still same issue. It has 85000 miles on it. Mechanic told me to open and change the fuel injector for cyclinder 6. I opened this up. it looks clean. I consults dealership they say it look okay. unless i replace it with the new one.

I am kind of confused now. Is it ECM? as every one here say its ECM?

How can in simple I check ECM, i know where it is. I can fix some stuff. Can I open it up and take it to the dealership as ask them if they can check it? is there any way I can check this one?

I will really appreciate your help. I am in deep trouble this CTS is messing up. I am still CTS fan and want to upgrade to 2008. Please help! will appreciate it.

 

I had the same problem a couple months back on my 05' 3.6l depending on the codes your pulling up it could be the ECM or simply the coil pack. Had code P0301 indicating a misfire on cylinder 1. Changed the coil pack and all 6 spark plugs and she runs better than the day I bought it. Good chance though its the coil over the ECM. It ended up costing me $400 when all was said and done but most of the cost was from the labor due to having to take off the upper intake to get to the coil.

 

Where is this coil pack you are talking about?
you mean spark plug's cover with wire box on the top? you want me to swap it with some thing else?

I really appreciate all help. P0306 is my code. I swapped the injector, still throwing the same code. Please help.

Thank you.

 

Start w the cheapest thing. Spark plugs then move to the coil pak, injectors replace all intake gaskets (which has to be done for the plugs) before you move to the ecm which is one of the more expensive options. Clean all of the fittings for the coil pack as well. Myself along w many other people on this forum and friends that have cts`s have had these problems all within the last month. I replaced all my plugs and upper intake gasket (which was shot to shit) and solved my misfire in cylinder 1.

 

Drbd786, please feel free to contact me anytime if you decide to go back to the dealer for further assistance. I'm always happy to contact them on your behalf, for instance, to check on your vehicle's status. My email is Katie_Lucille@gmexpert.com!

Best,

Katie
Cadillac Customer Service

 

Usually a plug (shows under load so usually rules out the ECM) or coil pak. Willing to bet if you swap #1 coil pak with another the misfire follows it.

:thumbsup:

 

Same exact thing with my 05 cts, but with cylinder 3. I'll replace the coil pack first, then ecm. Sure is annoying

 

Had PCM injector driver go out at 65k had coil go out at 115k Changing the chains and plugs at 120k. When disassembling found that three more coils were starting to crack so I opted to replace them all to take care of the potential issues. Found factory coils in a CARQUEST box saved about 25$ a coil. Not many people make aftermarket parts for these vehicles.

 

Coil pack is on top of each cylinder one 10mm bolt holding it in then pop it out. Injectors usually throw an P0200 code if they are bad. Take the upper plenum back off and replaced plugs and coil on the affected cylinder.

 

I've got a 2006 CTS and I'm having the same issue. I replaced the coil pack on cylinder one but the issue persist.

 

Update- I checked and I had no oil at all... so my engine might be destroyed.

 

MrR0se,
We're sorry to hear about the engine troubles you've encountered! Especially your discovery that there was no oil at all Let us know if there is anything we can look into for you! We can be reached either via private message on the forum or email (katie_lucille@gmexpert.com) - please include your name and contact information, the last 8 digits of your VIN, and a brief recap of the situation for Katie.

Sarah (Assisting Katie), Cadillac Customer Service

 

When you check oil every few fill ups have you been noticing it going down? There is no low oil sensor on these where the V8 does so very important with all the known oil consumption issues to never go more than a few tanks of gas before checking oil level.

 

There is a post on here for drilling out the PCV orfice just can't find it. I have did it to mine but haven't put it through its paces yet to see if it works.

 

My 2004 had a misfire in #4 cylinder so I changed all plugs and intake gasket and it's still got the shake of a misfire butt pops up code for injectors also check engine light is blinking goes away then comes back on and my lights inside are fluttering has anyone had this problem or knows what it might be ,??

 

Change the ignition coils also. You go through them when you remove the plugs. Not too difficult, but you might have to replace gasket. I bought the iridium plugs along with the 6-pack ignition coils.
While doing that, I also replaced the cabin, fuel, oil, air filter and the two belts.