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Blue 1993 Sedan DeVille, 4.9
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Discussion Starter #1
For the last few days my car has been running kind of erratic. Nothing major. I had the injectors replaced except one. The guy forgot to put one of them in. I figured that after running for a couple of weeks the one injector may not be working like the rest. Today I had one come loose while I was checking the connections and it started leaking. When I removed the injector the o-ring fell in. Will that mess up anything? I'm worried I have damaged the engine now. I'm worried because now it's idling worse than before. Gas mileage is a little off but not bad. I'm going to change the odd injector tomorrow. Is there anyway to suck that o-ring out of there?
 

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White Diamond '03 DHS (with DTS floor shift)
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You could try sucking it out. Nothing to loose. Worst case is it gets ingested and spit out the exhaust. The only question is would it melt in that fraction of a second and how much of a mess it might make. I doubt it would do any real damage.
 

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Blue 1993 Sedan DeVille, 4.9
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Discussion Starter #3
Something is blocking the fuel delivery because it's iding BAD. Almost like a spark plug is misfiring. What could I use to suck it out? It's a very tight spot. Doubt I could get a vacuum cleaner hose in there. Going to try to fish it out. Don't know how far down in there it is. Where would it go if it's pushed down too far?
 

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White Diamond '03 DHS (with DTS floor shift)
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This is one of those things where you'll have to improvise. If you push it in farther it will get sucked into the cylinder and spit out the exhaust valve. If you have it running, it may already have.
 

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Blue 1993 Sedan DeVille, 4.9
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Discussion Starter #5
So does it take awhile to go all the way through? Something is making the idle go haywire. I'll try to see if I can fish it out in the morning. Definitely not running like it's supposed to. Was getting great gas mileage and running smooth. I'll try to change the other injector. Let's hope that solves it. Or the injectors are not seated all the way.
 

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1992 Sedan Deville, 1984 Lincoln Town Car
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I bet ur right about the seating of the whole fuel rail. Sounds like you had to unseat it several times here to get at the problem and then have to O ring "fall in". the only place it would go is straight into the intake valve for that cylinder and is maybe lodged holding the valve open, in which case, fishing or sucking isn't going to retrieve it. Being rubber no way could it damage your engine. You'll just have to wait until the "pig works it's way through the python" is my guess. All that engine heat and gasoline pourin on it should destroy it in short order, hopefully.
 

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White Diamond '03 DHS (with DTS floor shift)
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So does it take awhile to go all the way through? Something is making the idle go haywire. I'll try to see if I can fish it out in the morning. Definitely not running like it's supposed to. Was getting great gas mileage and running smooth. I'll try to change the other injector. Let's hope that solves it. Or the injectors are not seated all the way.
No, it should pass through in nothing flat. This all seems to have started by swapping injectors or maybe before it.
 

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Blue 1993 Sedan DeVille, 4.9
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Discussion Starter #8
The injectors were fine until a couple of days ago. Had four of them installed a couple of months ago. Then had three others (he forgot one). so one is an original for the car. I got the bosch three from ebay. Car was running fine and getting great gas mileage. Could that one odd injector all of the sudden cause low gas mileage? I'm getting about 13-15mpg now when I was averaging 22city,28+highway. Did I mess up getting those bosch 3's?

The extremely rough idle is gone now. I guess it did pass through. I tried to fish it out but didn't find anything. It's now running like it has a slight miss. More noticeable when I get over 50+.
 

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Blue 1993 Sedan DeVille, 4.9
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Discussion Starter #9
Seems like I put some bad gas in it or something. At least I know that's what was going on last summer when I first starting losing gas mileage. It would miss when I would drive. I was told that I had a bad cylinder and needed a new engine. I mentioned this in another thread. I found out differently though.
 

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1992 Sedan Deville, 1984 Lincoln Town Car
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Seems like I put some bad gas in it or something. At least I know that's what was going on last summer when I first starting losing gas mileage. It would miss when I would drive. I was told that I had a bad cylinder and needed a new engine. I mentioned this in another thread. I found out differently though.
I remember that thread. Thought that reseating the fuel rail solved the problem then. Did you ever clean out the EGR valve and stack tubes?
 

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Blue 1993 Sedan DeVille, 4.9
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Discussion Starter #11
I took a coat hanger and pushed it up down those two tubes in the throttle body. What else is there to do? I am still getting a E48 code every so often.
 

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1992 Sedan Deville, 1984 Lincoln Town Car
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Perhaps you need to do a little more cleaning. here is the last entry from your other thread with the instructions to clean out ALL the crud, including your EGR valve. The valve itself may be bad; you won't know till you try to clean it up.

U probly shoulda done the EGR valve when you had the fuel rail off. It can be removed and cleaned but is PITA to do that with the fuel rail back in place, plus you would need a new gasket for it. However what you can do is take the throttle body back off. pretty easy. Like HUF says clean the EGR stack tubes there in the intake. FSM recommends a 11/32 drill bit (use it manually, I did this to my Dev) to fit down into each tube and twist it to scrape the sides of all the crud ( a hanger would work too I guess). The only problem will be that once you loosen up all that crud, ideally you'd want to blow it out where the EGR valve sits. Now you'll run the risk of clogging the EGR valve up a bit. Try it and see what happens. Worst case you'll keep getting the code and then you'll almost have to suffer the PITA of removing the EGR valve and cleaning it. IF that happens, do not use solvent on the EGR you have to carefully tap the pintle with a plastic hammer to loosen the crud off and gently scour with a brush type tool or sponge. Make sure it is as spotless as possible. clean the mating surfaces on the engine and reinstall with new gasket.
 

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Blue 1993 Sedan DeVille, 4.9
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Discussion Starter #13
Would that cause rough idle? I noticed when I relieved the pressure on the fuel rail when I was trying to reconnect the leaky injector that not much gas came out of the nozzle on the end. Could the fuel pressure regulator be bad? What kind of screw do you use to remove it? Hard to tell.
 

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1992 Sedan Deville, 1984 Lincoln Town Car
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Would that cause rough idle? I noticed when I relieved the pressure on the fuel rail when I was trying to reconnect the leaky injector that not much gas came out of the nozzle on the end. Could the fuel pressure regulator be bad? What kind of screw do you use to remove it? Hard to tell.
If the car has been sitting for a few days the fuel pressure would drop to zero naturally.

The screw is a Torx and is a Houdini- pita trick to undo it upside down. I think GM intended for the whole fuel rail to be removed to get at it.

Your problem is more likely the EGR tho. Anything wrong with the emissions system can cause the rough idle. Is E48 the only code you get now?
 

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White Diamond '03 DHS (with DTS floor shift)
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I have never heard a good word mentioned in the same sentence as Bosch, especially when talking about the Northstar. I've never used a Bosh product so I do not speak from experience. "Your results may differ".
 

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Blue 1993 Sedan DeVille, 4.9
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Discussion Starter #18
Car hasn't been sitting. I drive it everyday. I'm going back forth every few hours. Gas mileage is my main issue. Getting anywhere from 14-20mpg versus 22+ before. E48 code comes up periodically not all the time. Yes it's the only code I get. I did use pipe cleaners to rod out the egr tubes. A little dirty, not much. I've done them several times in the last few months. I'll try cleaning the egr valve.
What fuel injectors do you recommend Ranger? The bosch were recommended on this forum so that's what I went with. If there is something better for a reasonable price I'll get them later and swap them out if this problem doesn't change.
 

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1992 Sedan Deville, 1984 Lincoln Town Car
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I have never heard a good word mentioned in the same sentence as Bosch, especially when talking about the Northstar. I've never used a Bosh product so I do not speak from experience. "Your results may differ".
Well like any company that has diversified products, some excel in quality, some don't! Lots of happy customers, some not.
In my research on Fuel Injectors, Bosch came out way ahead of the Cadillac OEM brand. When I can afford it I will buy all Bosch for my 92 Deville.

AC Delco charges an arm and a leg for parts that they don't even manufacture anymore. They have the same problem, some products excel, some don't. Lots of happy customers, some not. I've had awful experience with their spark plugs in numerous vehicles foreign and domestic. They seem very low end, quality wise. but I guess maybe the N* engine can't live without them and has problems with the Bosch.

Some people think caviar is wonderful but to me it's yuk and poo.

6 of 1, half dozen of another. LOL! Thanks for your opinion. Thank God, we are still all entitled to have one in the USA.
:usflag:​

Update: Just found this. Here is a quite interesting thread on this very subject, especially where DIYguy chimes in toward the end

http://www.cadillacforums.com/forums/cadillac-escalade-ext-esv-forum-1999/168826-confused-about-spark-plugs-get.html
 
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