Idle mystery-I need suggestions!
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Idle mystery-I need suggestions! - 12/1/2005 10:44:35 PM
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178kgoingstrong
Posts: 3
Joined: 12/1/2005
Status: offline
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97 Sonata SE V6 178k miles
Had a circle of events on this car. Problem free until now. Sorry so long. There is just too much detail!
I may occassionally need to try and start the car twice in the morning. It has happened more since my change out of the Air flow meter (IAT and MAF sensor too) last month and the other items placed on the car to try to relieve secondary symptoms.
I have a rough idle. Worse in the morning or after a long sitting. However, the car's idle improves after about 4 miles or so. Then it is an occassional hiccup here or there.
I start it later that day and she starts right up and an occassional hiccup here or there.
I have to say that I can not report that I am having any performance loss. She seems reved up higher than before the TPS replacement. She is in idle sitting at 900 where as she us to be at about 650. When I take my foot off the brake, she has no problem taking right off. I can feel the gas cut off and kick in when I put my foot back on the accelerator while driving at 80mph. I also know that means my car is getting way too much gas as she will make little puffs of light smoke and I can smell a little gas in the exhaust.
This happens almost everyday. But since they are not happening back to back, the car is not detecting the malfunction and giving me a code.
I would like to add that the CEL does work. I created a random misfire to test it and I was successful. I cleared the P0300 code.
I have pulled the spark plugs and they are only 4 months old. They recently underwent a fuel injection cleaning and flush. I know that is hard on plugs and olderplugs usually do not make it after injection cleaning. There was an accumulation of carbon on plugs 5 and 6, but the spark is adequate. A compression and leak down test shows the car to be fine despite her miles. I have had the TPS replaced, the timing inspected, the sensors tested, vacuum checks, injector checks, fuel injection cleaning, distrib/cap/rotor replacement in August and another inspection during last shop visit, air filter replaced, fuel filter replaced, NGK plugs in July and wires, catalyst looked at, oil leaks (very small valve cover, but doesn't drop on ground), transmission fluid levels, ECT inspected, replaced PCV valve, o2 sensors replaced only 20k miles ago with timing belt replacement (volts fine).
My shop is telling me that they firmly believe that since the car did better after the fuel injection cleaning. Then the car slipped back into a rough idle because something may have gunked up the fuel line or some junk may be restricting fuel flow or a vacuum issue. However another peson had a similar intermittent problem with idle (but his car shut off on him) and states I should be looking more into the ignition coil. Something about the injectors being fired up at once rather than a sequence. What do you think? Any opinions on this?
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I luv them killer bee's
Bagwell, Berkman, Burke, Biggio, Backe
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RE: Idle mystery-I need suggestions! - 