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Those engines are know for premature failure due to piston ring issues. If you are suffering from excessive oil consumption, you will need to rebuild the engine._x000D_
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They also have a recall for PCM reprogramming to reduce fuel mixture as well as issues witQuoted From college man: _x000D_
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pull the cop for each_x000D_
cylinder and inspect the bottom for burning. where the old plugs_x000D_
discolored? did you use NGK plugs?_x000D_
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I’m using cheap NGK V-Power plugs to check just to see if it was the old plugThanks for the responses everyone._x000D_
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I’ve done all the recalls for sensors and fuel pump assembly on the car. I’m aware of the many design flaws such as the butterfly screws (did the loc-tite) and disintegrating pre-cats in the header (catless header insit would be better for the power balance test to be done_x000D_
while its happening for sure. but try the test any way. maybe_x000D_
we will get lucky. with the car not running. pull the cop for each_x000D_
cylinder and inspect the bottom for burning. where the old plugs_x000D_UPDATE:_x000D_
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The car finally threw a code. P0304._x000D_
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Now that I know it’s cylinder #4 and knowing the following information:_x000D_
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-spark plugs have less than 5000 miles on them_x000D_
-short term fuel trim holds at -11 or more during idle. This is consistent and hoBTW, I do plan to swap the coils and see if the code goes to the other cylinder. But the misfire happens so randomly and sometime it doesn’t happen for weeks. Can I do a resistance check on the coils too and compare it to the others?
[quote]Quoted From JDang444: _x000D_
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BTW, I do plan to swap the coils and see if the code goes to the other cylinder. But the misfire happens so randomly and sometime it doesn’t happen for weeks. Can I do a resistance check on the coils too and compareIf an injector is leaking then you would see negative STFT numbers as the computer would be subtracting fuel.
What are the LTFT at?_x000D_
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The job of the LTFT is to keep the STFT as close to 0 as possible._x000D_
_x000D_Quoted From dreamer2355: _x000D_
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What are the LTFT at?_x000D_
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The job of the LTFT is to keep the STFT as close to 0 as possible._x000D_
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Last time I monitored it was at -4.STFT numbers will always fluctuate up and down. As long are there within +/-10 of each other, its fine._x000D_
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But for the LTFT numbers, it is taking away some fuel but it seems like its within specs._x000D_
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If you want to chase injectors you could do a injectorAfter seeing the code for cylinder 4 misfire, I swapped ignition coils with #1.
Months later, it’s misfireing more frequently and I happened to catch the right moment to do the power balance test. It was missing randomly and inconsistently. #1 now has the questionable ignition coil.
Disconnected #1 and the miss was rythmic. Put #1 back on and disconnected the others. With any others disconnected, the miss was more frequent. I would hear a double miss from time to time. This pointed to #1 missing plus the disconnected cylinder also missing.
I bought a new ignition coil at O’Reily’s and the problem’s now fixed.
Thanks to Eric and others for their advice on the power balance test. Luckily I didn’t listen to the auto shops advice to replace the headgasket. I just didn’t see any symptoms like missing coolant or oil or bad compression test numbers to point to a bad headgasket.
Should I replace all the ignition coils? Or should I just wait for them to go bad individually. I figure if one went bad, the rest would soon follow.
After seeing the code for cylinder 4 misfire, I swapped ignition coils with #1.
Months later, it’s misfireing more frequently and I happened to catch the right moment to do the power balance test. It was missing randomly and inconsistently. #1 now has the questionable ignition coil.
Disconnected #1 and the miss was rythmic. Put #1 back on and disconnected the others. With any others disconnected, the miss was more frequent. I would hear a double miss from time to time. This pointed to #1 missing plus the disconnected cylinder also missing.
I bought a new ignition coil at O’Reily’s and the problem’s now fixed.
Thanks to Eric and others for their advice on the power balance test. Luckily I didn’t listen to the auto shops advice to replace the headgasket. I just didn’t see any symptoms like missing coolant or oil or bad compression test numbers to point to a bad headgasket.
Should I replace all the ignition coils? Or should I just wait for them to go bad individually. I figure if one went bad, the rest would soon follow.
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