|
Issues | Warranty | Recalls / TSB Problems, issues, recalls, TSBs |
|
Thread Tools | Search this Thread |
07-25-2020, 03:48 PM | #1 |
Junior Member
Join Date: Jul 2020
Drives: GT86
Location: GERMANY
Posts: 3
Thanks: 0
Thanked 3 Times in 3 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Loud misfires, loud bangs, stock car, no CEL
Hey, I need help.
My 86 has a nasty misfire on nearly every startup and also under load (partial throttle to full throttle), mostly between 2500 and 3300 RPM. Only when I accelerate really slowly and carefully the car doesnt do it. It sounds like this :
. Not my video but same noise and under load its even louder, scarier and very frequent. Has anyone experienced something similar or knows someting about this issue? Thx |
The Following User Says Thank You to emerahl86 For This Useful Post: | humfrz (07-25-2020) |
07-25-2020, 04:02 PM | #2 |
Rust bucket enthusiast
Join Date: Feb 2017
Drives: 2013 Turbo Firestorm FRS
Location: Vermont
Posts: 3,934
Thanks: 3,200
Thanked 4,095 Times in 2,045 Posts
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
|
Could be a coilpack. Check the coilpack closest to the passenger's side headlight. And by check, I mean replace.
|
07-25-2020, 04:05 PM | #3 | |
Senior Member
Join Date: May 2013
Drives: 2013 FR-S, white, MT
Location: Puyallup, WA
Posts: 29,868
Thanks: 28,790
Thanked 31,816 Times in 16,425 Posts
Mentioned: 708 Post(s)
Tagged: 2 Thread(s)
|
Quote:
Have you hooked up an OBD reader up to see if it shows and codes? Does your car have any power mods? What was the last thing that you did to the engine? Come back. |
|
07-26-2020, 10:01 AM | #5 |
Professional Mechanic
Join Date: Apr 2010
Drives: 2017 86 6MT Oceanic
Location: Quebec, Canada
Posts: 789
Thanks: 17
Thanked 633 Times in 371 Posts
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
|
Even if there is no CEL, the car is still counting the misfires and storing them in a counter somewhere in memory, the CEL will light up when that counter reaches the correct value for a trouble code to set, but you can still read the counter before there is a trouble code.
It's in MODE $6, and you're not going to get to it with a cheapo code reader. So I suggest you bring it to a trusted mechanic. You CAN throw parts at it like suggested above, but I'll always advocate investigation over playing darts with parts. |
The Following 4 Users Say Thank You to RZNT4R For This Useful Post: |
07-26-2020, 05:23 PM | #6 |
Junior Member
Join Date: Jul 2020
Drives: GT86
Location: GERMANY
Posts: 3
Thanks: 0
Thanked 3 Times in 3 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Thanks for the replies so far.
I will replace the coilpack as suggested. I also already opened the engine and found a different Issue: The long screws which hold the two engine blocks together, (on the left side, besides the cylinders, way down there) are rusted and there is oil sludge around them. Looks like they dont seal properly so oil from the crankcase seeps in. Anyone experienced this issue ? I will take a picture/s next time I'm at the Garage. To answer some questions: Car is from 2013; just bought the car 2 months ago; only mods are K&N Filter and a catback exhaust, no engine tune afaik, but I'm the 6th owner so - no idea; didn't try a proper OBD reader yet, but will do that. I will report back if I fix it or break it further. Anyone have some suggestions on what to look for, now that the engine is out? Or useful Mods ? Small stuff, like oil cooler maybe? Thank you |
The Following User Says Thank You to emerahl86 For This Useful Post: | humfrz (07-26-2020) |
07-26-2020, 06:10 PM | #7 |
Member
Join Date: May 2017
Drives: FR-s
Location: 61108
Posts: 37
Thanks: 1
Thanked 4 Times in 3 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
sweet, some people pay money for bangs and fire.
|
07-26-2020, 06:36 PM | #8 |
Senior Citizen Member
Join Date: Jul 2018
Drives: Then-1977 Celica GT Now-2017 860SE
Location: In A Galaxy Far Far Away
Posts: 393
Thanks: 145
Thanked 385 Times in 201 Posts
Mentioned: 12 Post(s)
Tagged: 1 Thread(s)
|
|
07-26-2020, 07:06 PM | #9 | |
Senior Member
Join Date: May 2013
Drives: 2013 FR-S, white, MT
Location: Puyallup, WA
Posts: 29,868
Thanks: 28,790
Thanked 31,816 Times in 16,425 Posts
Mentioned: 708 Post(s)
Tagged: 2 Thread(s)
|
Quote:
|
|
The Following User Says Thank You to humfrz For This Useful Post: | LimitedSlip (07-26-2020) |
07-27-2020, 02:23 AM | #10 |
Senior Member
Join Date: Jan 2018
Drives: Crapcan
Location: Oregon
Posts: 11,163
Thanks: 18,156
Thanked 16,323 Times in 7,381 Posts
Mentioned: 107 Post(s)
Tagged: 0 Thread(s)
|
Possible DI seal failure.
__________________
"Experience is the hardest kind of teacher. It gives you the test first and the lesson afterward." -Oscar Wilde.
|
07-27-2020, 10:33 AM | #11 |
Senior Member
Join Date: Jul 2014
Drives: 2020 Hakone
Location: London, Ont
Posts: 69,845
Thanks: 61,656
Thanked 108,283 Times in 46,456 Posts
Mentioned: 2495 Post(s)
Tagged: 50 Thread(s)
|
Sweet lord there could be almost anything that was done and then removed. Probably a reason it has changed hands so often.
__________________
Racecar spelled backwards is Racecar, because Racecar.
|
07-27-2020, 02:39 PM | #13 | |
Senior Member
Join Date: Nov 2014
Drives: 2013 BRZ Premium 6MT White
Location: SE NY
Posts: 1,503
Thanks: 1,218
Thanked 669 Times in 474 Posts
Mentioned: 7 Post(s)
Tagged: 1 Thread(s)
|
Quote:
So you did the plugs already, now change the serpentine belt and maybe the idler pulley/tensioner. I'd also change the throwout bearing and clutch fork. Put in a Fumoto valve before you refill the oil. |
|
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
perrin catback resonated - loud enough or too loud? | theflathead | Engine, Exhaust, Transmission | 33 | 01-22-2018 05:46 PM |
Too loud! | booher | Engine, Exhaust, Transmission | 7 | 12-06-2017 07:07 PM |
Loud misfires upon cold start | connorlug | Issues | Warranty | Recalls / TSB | 42 | 03-31-2016 04:43 PM |
Invidia catless font pipe with stock exhaust. Will it be too loud? | chicagokid | Engine, Exhaust, Transmission | 5 | 08-04-2014 06:50 PM |
How loud can the car get with the stock muffler? | BlueDubbinTDI | Engine, Exhaust, Transmission | 8 | 09-15-2013 09:16 PM |