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Ok, I have searched around the forums but have not found a problem quite like what I have.
to start, I have an 91 EFI 5spd all stock. Car here: W4RKRYs 91 Build
It was getting hard to start a few months ago. If the car was driven, shut off, then started again with the engine warm, I would have to crank it for 20 seconds with the accelerator pinned. It would only fire on 2 cylinders, slowly gaining rpm until about 5k rpm then suddenly all the cylinders would fire and it would be fine.
Later, it would take up to 30 or 40 seconds to finally fire all the cylinders.
I replaced the stock fuel filter, was super dirty, but did not help. Car does this to this day.
I will post a poor quality starting video link as soon as it is uploaded to youtube.
Then, just about a week and a half ago, My milage has dropped considerably, down to almost 23 or so mpg. The check engine light will come on at random times then turn off. Doesnt matter if its hot, cold, driving fast or slow, it just comes on randomly. When I go to check the codes, there are none stored. I checked plugs and wires, they were ok, disty looks fine, etc.
I used a stethoscope to listen to the injectors, they appear fine as well.
Checked o2 sensor voltage, it swings from .85 to .19, so it seems ok.
I know they are switching to winter gas, but I would not expect this drastic of a drop in MPG.
I have not done a compression test, but I assume it is bad, this thing burns an obscene amount of oil, but it has always done that, never had MPG problems before.
to start, I have an 91 EFI 5spd all stock. Car here: W4RKRYs 91 Build
It was getting hard to start a few months ago. If the car was driven, shut off, then started again with the engine warm, I would have to crank it for 20 seconds with the accelerator pinned. It would only fire on 2 cylinders, slowly gaining rpm until about 5k rpm then suddenly all the cylinders would fire and it would be fine.
Later, it would take up to 30 or 40 seconds to finally fire all the cylinders.
I replaced the stock fuel filter, was super dirty, but did not help. Car does this to this day.
I will post a poor quality starting video link as soon as it is uploaded to youtube.
Then, just about a week and a half ago, My milage has dropped considerably, down to almost 23 or so mpg. The check engine light will come on at random times then turn off. Doesnt matter if its hot, cold, driving fast or slow, it just comes on randomly. When I go to check the codes, there are none stored. I checked plugs and wires, they were ok, disty looks fine, etc.
I used a stethoscope to listen to the injectors, they appear fine as well.
Checked o2 sensor voltage, it swings from .85 to .19, so it seems ok.
I know they are switching to winter gas, but I would not expect this drastic of a drop in MPG.
I have not done a compression test, but I assume it is bad, this thing burns an obscene amount of oil, but it has always done that, never had MPG problems before.
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