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Old 08-15-2018, 12:19 PM
Spyglass Spyglass is offline
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Join Date: Feb 2016
Location: Katy, TX
Cobra Make, Engine: ERA, stroked 428FE (462ci)
Posts: 33
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After a lot of traveling I'm back on the Cobra oil burning and miss fire investigation.

It still starts, idles and runs fine below 2,500 rpm and low throttle applications. However as soon as you get into the throttle it exhibits a variety of behaviors, all of which can all be experience in one drive. These can be:

1. 1/4 to 1/2 throttle acceleration, engine stumbles/misses but no obvious smoke from exhaust. I can't be 100% sure about this as it's difficult to see.

2. 1/2 to full throttle acceleration, engine stumbles/misses (more pronounced), seems to clear and blows out a huge continuous trail of blue smoke from both exhausts that is clearly visible in the mirror - it literally fills the road behind.

3. 1/2 to full throttle acceleration, engine stumbles/misses (more pronounced), blows out a single huge burp of blue smoke that's clearly visible in the mirror, seems to clear and car accelerates hard.

4. 1/2 to full throttle acceleration, slight engine stumbles/misses, car accelerates hard (as you'd expect), no obvious smoke visible in the mirror.

It doesn't seem consistent, or perhaps I'm not being very scientific in my testing, which is entirely possible.

I removed all eight plugs, they all had similar oil and carbon residue, see the attached photo. Between my oil leaks and oil burning, I'm using about a quart of oil every 300 - 400 miles.

Any ideas or recommendations for an FE specialist in the Houston areas I can take the car to?

Thanks
Kevin

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