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Trex87 11-14-2016 02:55 PM
Quick ignition question
 
Could a clogged cat damage brand new coils and plugs over a short period of time?

CelestialGryphon 11-14-2016 02:58 PM
More of the other way around, but I don't see why not. Backflow sucks, either way. Being able to move as much exhaust out of the engine is the exhausts function, along with heat. So, if it's backing up I could see it as an issue.

Trex87 11-14-2016 03:02 PM
Originally Posted by CelestialGryphon (Post 4791600)
More of the other way around, but I don't see why not. Backflow sucks, either way. Being able to move as much exhaust out of the engine is the exhausts function, along with heat. So, if it's backing up I could see it as an issue.
True, I was thinking flooding the engine might damage the plugs more

RX N8 11-14-2016 03:39 PM
No. It shouldn't damage the motor either, but it will make it harder for it to "breathe". Imagine trying to breathe through a straw with a piece of paper stuck in it.

The only damage that should come from this is thermal shock on the exhaust pipe around the catalytic converter (you might see cracks/ballooning in that area).

Trex87 11-18-2016 12:33 PM
Originally Posted by Charles R. Hill (Post 4792556)
No, but a clogged catalyst will, eventually, overheat the seals....... which results in compression loss.
Yeah I replaced my oem with an aftermarket one then after a while I was suspicious and pulled it and sure as hell was rattling when I shook it. Took my oem gutted it and now I have peace of mind.

Trex87 11-18-2016 08:31 PM
Originally Posted by Charles R. Hill (Post 4792612)
You may want to verify the operation of the coils, even though they may be still rather new.
Would checking the ohms be the best way of checking?

Trex87 11-19-2016 10:17 AM
Originally Posted by Charles R. Hill (Post 4792631)
That method is useless. Attach an inductive timing light to each spark plug wire while the engine is running and observe the strobe light at idle, at 4K rpms, and while revving to redline. In all cases the strobe should flash brightly and steadily.
OK I'll get one of those. How accurate is the spark plug tester? The one that you plug in between the coil and the plug

dannobre 11-19-2016 01:48 PM
A proper plug tester works well.....it will have a large gap that is much harder for the charge to jump than the plug gap. If you get a strong spark with that your coil is OK

Trex87 11-20-2016 06:42 PM
Originally Posted by Charles R. Hill (Post 4792736)
They key to using one of those is that one must understand the visual differences in varying spark quality. Plus, it takes longer to issue the test process.
Strong bright spark?

Trex87 11-21-2016 12:19 PM
Thanks for the info guys. Currently I have a stuck open ssv. Weird thing is that I cleaned it a few weeks before the CEL. Before and after cleaning it I still have power loss between 3k and 5k. I can feel a boost in power right after 5k which tells me it's not operating right

dannobre 11-21-2016 03:48 PM
Originally Posted by Charles R. Hill (Post 4792736)
They key to using one of those is that one must understand the visual differences in varying spark quality. Plus, it takes longer to issue the test process.
And the problem with a timing light is there is no way to tell spark quality either. They both take some interpretation. Both work well if the coil is dead though 😎

9krpmrx8 11-21-2016 03:56 PM
Don't forget about this either.


https://cimg3.ibsrv.net/gimg/www.rx8...de333a6657.jpg


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