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Discussion Starter #1
Hope I can get some help here I have put new plugs and wires in replaced the o2 sensor in bank one side one, just replaced the coil pack for cylinder 5. Car is still idling rough when the car is in gear once I give it gas it smooths out. Am I missing some thing else? Any help would be greatly appreciated.
 

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98 DeVille, 97 DeVille d'Elegance
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Is the SES on? If not you probably need to clean the throttle body. They get carboned up and cause poor idle and other issue. It should be cleaned once a year ideally.
 

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98 DeVille, 97 DeVille d'Elegance
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If it's still on or flashing cleaning tb not going to make it go away. Plug, wires or coil most likely culprit. Did you use ac plugs as they dont like anything but recommended plug. Have you pulled codes?
There is a sticky at top of forum on hiw to pull codes and links to code definition. Post code with definition and if current or history and someone should be able to help.
 

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Discussion Starter #5
Yeah it has ac Delco plugs in it. The only current code I have is pc0300 which is multiple misfire. The car does have a noticeable gas smell when it runs don't know if that helps or not.

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The plugs and o2 sensor were replaced yesterday I just replaced the coil this morning for cylinder 5.
 

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98 DeVille, 97 DeVille d'Elegance
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Check the fpr(fuel pressure regulator) by pulling vacuum hose off it and if any gas vacuum port it is bad(car running).
I will go out on limb and assume you replaced the correct coil also. Not that I've ever changed the wrong one...
 

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Discussion Starter #8
Yeah I replaced the right one had code read at shop came up number 5 cylinder the coil was for cylinder 2 and 5. No never knew about a recall on the car I've only had the car about 2 years. How long ago was there a recall on it I'm assuming a while right?
 

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98 DeVille, 97 DeVille d'Elegance
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If you have nylon fuel rail it may be on recall list(94 to 97 various models) . Specific nylon rails were recalled not all. If stainless already good to go. If nylon i would recommend you check it for leaks. My 98 rails looked poorly so I replaced last year.
You can google for specifics on tsb or give vin to dealer and they can check.
 

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White Diamond '03 DHS (with DTS floor shift)
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I think the recall was for '95 - '97's, but as Rod said, if they are black nylon, get to a dealer for a (free) stainless steel replacement.
 
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