Help car in limp mode PO300 P0305 P0306
09-30-16, 11:39 PM
#16
What you are describing points to a ignition coil or wire issue.
If that is not the cause, although this may be a long shot, if you have the OBD flashing tool, try putting the stock tune back on or just re-flash the RR Tune.
If that is not the cause, although this may be a long shot, if you have the OBD flashing tool, try putting the stock tune back on or just re-flash the RR Tune.
Last edited by wmjeffreyw; 10-01-16 at 12:55 AM.
10-01-16, 06:28 AM
#17
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10-01-16, 07:20 AM
#19
Pole Position
Have a 2011 ISF with 16K miles, Joe Z intake /Exhaust, Sikky headers, and RRRacing tune. The last modification was the RRRacing tune approx 6 months ago.The car has been running fine with no problems... While driving the other day for just a few minutes, I was waiting in traffic the car starts to idle rough, as the traffic started moving the car continues to pop and miss definitely not as responsive as normal, in a mile the check engine light and traction light come on and the car goes into limp mode.. the throttle response is minimal; I can only get the engine to make 1500 RPM..
Ran an OBD2 scan and came up with P0300 misfire Detected on multiple cylinders and P0305 & P0306 (misfire detected on cylinders 5&6 ) . Changed the battery because it was the original and was getting weak at start ups. Added some sea foam and fresh gas ...any thoughts as to where I can start to try and fix this problem?
Ran an OBD2 scan and came up with P0300 misfire Detected on multiple cylinders and P0305 & P0306 (misfire detected on cylinders 5&6 ) . Changed the battery because it was the original and was getting weak at start ups. Added some sea foam and fresh gas ...any thoughts as to where I can start to try and fix this problem?
10-01-16, 07:56 AM
#20
I would remove the coil packs and spark plugs on cylinders 5 and 6. if they look ok visually, then remove the coil packs and plugs on cylinders 7 and 8, and install the parts from 5 and 6 on to 7 and 8.. then test drive. if the fault codes come back, but now are listed for cylinders 7 and 8, then you know you have an issue with those parts. If the misfire does not follow those parts, you may have a big issue.
10-02-16, 07:46 PM
#21
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Update..... switched coils 5 & 7 cleared ECU and started car and with in 15 seconds of idle the check engine light comes on, throwing same code misfire in cylinder 5 and 6.
I have been instructed to change primary O2 sensors currently have them on order will change when parts arrive.
I have been instructed to change primary O2 sensors currently have them on order will change when parts arrive.
10-02-16, 08:29 PM
#22
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Hey I'm sorry about all the issues, but my car did something similar about 8 months ago. I had P0300 along with like 15 other codes and it ended up being an electrical issue which tripped a fuse. So I would definitely check the fuse box just to be safe, maybe it could be that? Good luck!
10-03-16, 07:01 PM
#24
Hey I'm sorry about all the issues, but my car did something similar about 8 months ago. I had P0300 along with like 15 other codes and it ended up being an electrical issue which tripped a fuse. So I would definitely check the fuse box just to be safe, maybe it could be that? Good luck!
10-03-16, 08:36 PM
#26
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Checked resistance on the O2 sensors today between the black wires I have an Ohm resistance of 2.8 Ohms . Actually after receiving the new O2 sensors they are reading 2.8 also.
Last edited by cajunlexus; 10-06-16 at 06:55 PM.
10-06-16, 07:02 PM
#27
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I have changed the Battery, checked the OCV, changed the plugs, swapped the coils, changed the primary O2 sensors, added sea foam to gas, checked all the fuses, checked gas cap and still got the traction control and check engine lights after start up. Finally called a flatbed to bring it to the dealership will post the outcome ..Thanks for all the suggestion !
10-06-16, 08:35 PM
#29
I have changed the Battery, checked the OCV, changed the plugs, swapped the coils, changed the primary O2 sensors, added sea foam to gas, checked all the fuses, checked gas cap and still got the traction control and check engine lights after start up. Finally called a flatbed to bring it to the dealership will post the outcome ..Thanks for all the suggestion !
10-07-16, 07:34 AM
#30
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