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Old 08-12-2017, 11:46 PM   #1
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Help!!

so I just bought my 04 rx8 thinking it needed a new engine / rebuild. I went out today and check he plugs and coils. I found 3 pretty much dead coils and every plug fouled. prior to this, I could.l NOT get this car to even idle. I changed plugs and coils today and instantly I have a decent idle close to 1k RPM however, the car still has an extremely sluggish acceleration. I was told this 8 has had a recent engine transplant. It still has marker paint on every part on it including the fan belt. I let the car idle for over an hour today, I can let her run, turn it off and start it hot without any problems. I have cleaned the MAF sensor, barometric sensor, air filter... does anyone have any other suggestions? I'm going to attempt to pull the Cat tomorrow and see if it helps anything, maybe the cat is clogged? The faster you press the gas, the worse the bogging is. I am unable to get this car to a shop currently for a compression test, however I have pulled the leading plug out and cranked it and have gotten a consistent rythem. Any info would help. Thanks!
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Old 08-13-2017, 12:39 AM   #2
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Is it sluggish through the entire rev range ?

Try checking ssv .... see this thread :https://www.rx8club.com/series-i-tro...operly-265862/
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Old 08-13-2017, 12:31 PM   #3
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After around 4K RPM it starts to liven up. The idle is now really low, you can barely hear the car running. It has a solid CEL light now so I'm going to check the codes when I get home this evening and hopefully get this thing going. I'll touch base on here when I get the codes ran.
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Old 08-13-2017, 11:08 PM   #4
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So I'm throwing 6 codes. P0113, P0103, P0107, P0102, P0661. Cleaned the MAF again and sprayed some throttle body cleaner in the throttle body just for good measure. Today this thing would barely idle at like 750 and would randomly shoot up to 2k. At one point it was if it wasn't even running. Would I get a code if the cat has failed? I haven't had time to pull it or the SSV. Maybe tomorrow before work.
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Old 08-14-2017, 12:17 AM   #5
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maf and Iat are on the same plug to the maf - check that connection

Baro sensor is the one attached to the same bracket as the air pump - check connection . Also try unplugging the baro sensor and see if idle comes right.

And you also have an ssv code ....... see my first post .
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Old 08-14-2017, 12:24 AM   #6
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I'll definitely try the sensors / connections tomorrow. Not sure if I'll have time to check the SSV before work or not tomorrow anyway but we'll see. I drove the car today for a minute. It has 0 power on the low end. Had to rev past 4K to take off. I'm thinking I may try a seafoam treatment also.
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Old 08-14-2017, 06:15 PM   #7
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P0113 IAT sensor circuit high input ON 1 CCM
P0103 MAF sensor circuit high input ON 1 CCM ,
P0107 MAF sensor circuit high input ON 1 CCM
P0102 MAF sensor circuit low input ON 1 CCM ,
P0661 SSV solenoid valve control circuit low ON 2 CCM

Engine Power Loss
• chokes as revs increase
o O2 sensor failure (too rich)
o MAF failure
o MAF disconnected
o e-shaft sensor fouled
o accessory belt fraying
• high end power loss (hard fuel cut)
o Rev limit reached
• high end power loss (jerky and stumbling)
o Ignition failure
o fuel pressure loss
o e-shaft sensor fouled
• high end power loss (smooth)
o Catalytic converter clog
o air filter clog
• low end power loss (smooth)
o Engine compression loss
• low end power loss (stumbles)
o Ignition failure
o front O2 sensor failure
• revs slowly but smoothly
o O2 sensor failure (too lean)
o catalytic converter clog
o air filter clog
• sudden power drop at a specific rpm
o Intake valving actuation problem
• trouble getting to redline
o Ignition failure
o front O2 sensor failure
o catalytic converter clog
o air filter clog
o e-shaft sensor fouled
o fuel pressure loss
o MAF failure
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Old 08-14-2017, 09:55 PM   #8
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So I took off work today just to work on this car. I changed the MAF sensor, baro sensor, and took the cat completely off. I was actually able to drive my car after... kinda. I drove about 15 miles hoping it would clear up. The power is still gone through the powerband. It idles perfect now at least. I still didn't get the chance to pull the SSV. I gutted the cat so I'll put it back on when I get the chance. Tomorrow I'll try cleaning the e-shaft sensor and pray that it helps. Also, when you first start this thing, it literally won't do anything. Try and give it gas, it seems like it wants to start singing, but she gets stage fright...literally 0 throttle response. Hopefully if I diagnose my current problem, it fixes that one too? I really don't think I'm experiencing engine failure. This thing hot starts way too easy, or maybe I'm just in denial? I did take a video of it accelerating, if someone would like to see it then message me your number and I'll text it to you. OH! Also, on my way back to the garage from my 15 mile adventure earlier, she let out a few good backfires in mid rev and I received a flashing CEL. The cat was off so the CEL was on anyway along with the rest of the codes she's throwing, but I know flashing means misfire. I've already changed plugs and coils. Any other reason it would act that way? The light stopped flashing and it ran fine after that. Hope it's nothing major.
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Old 08-15-2017, 07:02 AM   #9
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did you change wires as well as plugs and coils ?
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Old 08-15-2017, 11:02 AM   #10
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Plug wires are in the mail, I had to order those. The current wires appeared to be in good shape though. Hmm, would a seafoam treatment have any negative impact on the plugs? Just a thought.
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Old 08-15-2017, 12:12 PM   #11
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Cant tell about wires from the way they look if you haven't electrically tested them. And if they are old or worn, even a single bad wire, that will degrade your ignition system as badly as a worn coil or worn plug. Rule of thumb is to change wires, coils and plugs together, unless you have BHR or similar coils, which are lifetime.

Don't seaform until you have those new wires as you need full ignition system working at top performance. Follow seaform directions and you will have no adverse effects on your new plugs.

Last edited by gwilliams6; 08-15-2017 at 12:22 PM.
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Old 08-15-2017, 02:21 PM   #12
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Looks like my hands are tied until my wires get here. Today I cleaned the e-shaft sensor and no dice. When I get my plugs in, I'll change those and clean the SSV for good measure. After that, I believe I'll assume the worst and shoot for a new engine
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Old 08-15-2017, 03:30 PM   #13
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Ccreech ..... did you even look at the video I posted the link to ?
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Old 08-15-2017, 03:34 PM   #14
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Yea I did check it out. I just haven't done it because I have a nagging wife and a new born baby at home. I have been hesitant to do anything that's time consuming really because of the ole lady making me do honey doo chores. I'm going to try it this weekend though for sure. Maybe sooner.
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Old 08-15-2017, 03:57 PM   #15
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The whole point of the video is that it can take less than a minute to check the ssv is working properly ....
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Old 08-15-2017, 04:47 PM   #16
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Brettus, my bad man. I remember clicking the link but I ended up watching a video of someone cleaning the SSV. I'll get on that tomorrow and see if it's actuating properly. Sorry about that buddy, thanks again though.
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