Hey all, I know this topic has been covered countless times, & so of course I know the typical culprits of such problems. First thing I did was upgrade to bhr ignition system. Now immediately after that, the car was running perfect again. But about a week later the problems were coming backing, this time shuddering the car trying to accelerate. I found that one of the air intake hoses had gotten moved out of place during the ignition install and a belt was steadily eating through it. Luckily there was an outer rubber tubing over the inner tubing that actually contained the airflow, so it didn't eat through the tubing enough to leak. Again it ran better once I put the tubing out of the belt's way.
Give it another couple weeks... same problems again but milder. One of the intake tubing clamps was not on the plastic nipple as it should've been but was sort of squeezing the tube and reducing airflow... this helped only a little.
Now I don't have shuddering problems anymore except at 70mph+ and that's probably due to needing an alignment. But I do have power loss at low to mid RPMs. I'm hoping my hardest that it's not the C word with my engine... but I will mention my MPG has not significantly dropped, not including before the new bhr ignition and during the stray intake tube. I hover around 17-18.5 with mostly highway and curvy country Rd miles (the roads our cars were built for).
I still have the stock cat on but just got a used bhr midpipe in case it is the cat... but before I do that, I have to wonder if it'd be wisest to take it by mazda first for a compression test. Or, with no loss in mpg, is that a serious possibility anyway? Oh and of course I never baby it, I redline at LEAST once a drive and usually more than that.
TL;DR
I'll just list what I've done so far to remedy the problem for a tl;Dr and have those more knowledgeable than I suggest my next move.
06 rx8 with 93k on it (getting up there)
New bhr ignition (helped briefly)
Replaced air filter (not a hi flow)
Cleaned MAF (also helped briefly)
Also cleaned throttle body (but didn't really know what I was doing)
Rearranged air intake tubes away from belt
Next moves being considered:
removing cat
Compression test
I don't want to blow $100 I don't have on a comp test if I don't have to, but I also don't wanna pull the cat only to find i need to put it back on to bring it to the stealership, or dump more money on nicer performance parts I don't need if I'm gna have to pay for an engine rebuild.
There also could be a leak in my air intake, possibly. Is there any way to check this? I read about spraying lighter fluid around the intake to see if any of it ignites, indicating and locating the leak. But that sounds like a recipe for disaster.
Thanks for all who help!
Give it another couple weeks... same problems again but milder. One of the intake tubing clamps was not on the plastic nipple as it should've been but was sort of squeezing the tube and reducing airflow... this helped only a little.
Now I don't have shuddering problems anymore except at 70mph+ and that's probably due to needing an alignment. But I do have power loss at low to mid RPMs. I'm hoping my hardest that it's not the C word with my engine... but I will mention my MPG has not significantly dropped, not including before the new bhr ignition and during the stray intake tube. I hover around 17-18.5 with mostly highway and curvy country Rd miles (the roads our cars were built for).
I still have the stock cat on but just got a used bhr midpipe in case it is the cat... but before I do that, I have to wonder if it'd be wisest to take it by mazda first for a compression test. Or, with no loss in mpg, is that a serious possibility anyway? Oh and of course I never baby it, I redline at LEAST once a drive and usually more than that.
TL;DR
I'll just list what I've done so far to remedy the problem for a tl;Dr and have those more knowledgeable than I suggest my next move.
06 rx8 with 93k on it (getting up there)
New bhr ignition (helped briefly)
Replaced air filter (not a hi flow)
Cleaned MAF (also helped briefly)
Also cleaned throttle body (but didn't really know what I was doing)
Rearranged air intake tubes away from belt
Next moves being considered:
removing cat
Compression test
I don't want to blow $100 I don't have on a comp test if I don't have to, but I also don't wanna pull the cat only to find i need to put it back on to bring it to the stealership, or dump more money on nicer performance parts I don't need if I'm gna have to pay for an engine rebuild.
There also could be a leak in my air intake, possibly. Is there any way to check this? I read about spraying lighter fluid around the intake to see if any of it ignites, indicating and locating the leak. But that sounds like a recipe for disaster.
Thanks for all who help!
Another 8 with low RPM power loss and occasional rough idle
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