Service Bulletin concerning Crown Vic rough idle

[Curtis]

These pdf versions of the bulletin cover rough idle, lost power, bad teeth and acne... as well as what to do about it.

[peakay]

Thanks for posting here Curtis...you saved me the trouble! I hope this helps the NGVic community.

[CraziFuzzy]

Well, makes me wish I hadn't spent a few hundred dollars on changing out the O2 sensors... mine was stuttering like this, and would give me o2 sensor failures. Changing them out seemed to fix it for a short duration, but it came right back. It isn't every start, but often enough to annoy me, especially since i haven't been getting the power i'm used to either.

[peakay]

I'm in the same boat. My recommendation would be to clean the injectors asap as i am afraid it may have burned out one of my cats.

[turbocohen]

Oil contamination tolerance was the #1 issue 17 yrs ago and it still is. There is a replacement injector from Siemens (soon to be Continental) that is close enough to the bosch calibration that manages oil much better. It is used by Opel and daimler in the EU but I am not sure that is the same cal.
good luck, T

[MiamiCNG1]

Hello, I'm new to the forum I have a 1998 CNG Crown Vic but it's missing the main CNG computer that goes in the front of the car. I bought this from a local police auction, they said the car ran fine but the computer broke. I am in Miami,FL and unfortunetly most people don't even know that CNG cars exist here. (No Parts) I tryed Ford but no luck there, they said it was on backorder I've been waiting for 2 months now.Can anybody Help me?

[holtek]

From the posted service bulletins, I get the impression that the fuel injectors require some residual oil in the fuel stream to remain happy. That would kind of be a problem if you used a home fueling appliance exclusively since they don't use oil. I use a Fuelmaker phill with my crown vic and civic GX and only rarely get a fast fill since the nearest station is 20 miles away from me!

[cngmike]

I would guess that you bought your Crown vic on the used market. Most station operators are not to fanatical about oil carry over. So there is probably enough oil in your tanks to cover the the 2 parts per million that is necessary for the injectors.

[Techie]

From the posted service bulletins, I get the impression that the fuel injectors require some residual oil in the fuel stream to remain happy. That would kind of be a problem if you used a home fueling appliance exclusively since they don't use oil. I use a Fuelmaker phill with my crown vic and civic GX and only rarely get a fast fill since the nearest station is 20 miles away from me!

Have you checked your fuel filter? That should be a good indication if there is any oil in the system. If too much oil is in the system, filter housing will be full. Ford will tell you to drain it. I would say drain some, but leave about 1/4 to 1/8 of level in it. I heard of a few guys adding WD-40 to filter housing but I have never seen it or tried it.

[kameron13462]

Question to the crowd: The TSB is somewhat nebulous on whether the coalescing filter should be present during the injector fluid operation. It states to fill the bowl 3/4 inch from the top.

So - does that mean to install the coalescing filter, fill the bowl 3/4 inch from the top, reinstall, then run engine?

Or - does that mean fill the bowl 3/4 inch from the top, reinstall without the coalescing filter in place, then run engine?

Please keep in mind this is someone asking a question who wants to conduct the service and has not done it before.

Thanks!

Kameron