Have a problem: unstable idle.
#1
Have a problem: unstable idle.
Hi, guys!
I bought rx-8, 2004 release, 125 000 km run, engine 13b after rebuild.
I replaced all of consumables, ignition coils, spark plugs, ignition leads, fuel pump, 2nd O2 sensor.
No matter, cold or hot engine, but have this problem:
after start, working normally, then idle turn unstable
Please help!
Dont know what to do!
I bought rx-8, 2004 release, 125 000 km run, engine 13b after rebuild.
I replaced all of consumables, ignition coils, spark plugs, ignition leads, fuel pump, 2nd O2 sensor.
No matter, cold or hot engine, but have this problem:
after start, working normally, then idle turn unstable
Please help!
Dont know what to do!
Last edited by semidelsky; 01-22-2019 at 09:03 PM.
#4
FULLY SEMI AUTOMATIC
iTrader: (9)
did you reset the ess with the 20 brake stomp? a lot of people forget this when swapping a new motor. who rebuilt it? do you have current comp #s?
#5
it may be due to low сompression?
if i unplug the maf sensor, idle turns normal
Last edited by semidelsky; 01-22-2019 at 09:55 PM.
#6
FULLY SEMI AUTOMATIC
iTrader: (9)
you should always get comp check before buying. do you have anyway to data log? vac leak possibly?
#7
#9
#11
What am I doing here?
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If it runs better with the MAF sensor disconnected and you've tried several different MAF sensors, then it's time to check your wiring and connector.
This page should have the applicable wiring diagram for you to test the resistance for each pin of the connector back to the ECU.
Edit:
Note to self: Self, post the actual link, you muppet.
http://foxed.ca/rx7manual/2003mazdar...200100W03.html
Edit2: Another thought: have you smoked it out for vacuum leaks?
This page should have the applicable wiring diagram for you to test the resistance for each pin of the connector back to the ECU.
Edit:
Note to self: Self, post the actual link, you muppet.
http://foxed.ca/rx7manual/2003mazdar...200100W03.html
Edit2: Another thought: have you smoked it out for vacuum leaks?
Last edited by NotAPreppie; 01-23-2019 at 07:54 AM.
#14
If it runs better with the MAF sensor disconnected and you've tried several different MAF sensors, then it's time to check your wiring and connector.
This page should have the applicable wiring diagram for you to test the resistance for each pin of the connector back to the ECU.
Edit:
Note to self: Self, post the actual link, you muppet.
http://foxed.ca/rx7manual/2003mazdar...200100W03.html
Edit2: Another thought: have you smoked it out for vacuum leaks?
This page should have the applicable wiring diagram for you to test the resistance for each pin of the connector back to the ECU.
Edit:
Note to self: Self, post the actual link, you muppet.
http://foxed.ca/rx7manual/2003mazdar...200100W03.html
Edit2: Another thought: have you smoked it out for vacuum leaks?
where is main relay? i tested maf connector to ECU, its ok.
#15
#20
FULLY SEMI AUTOMATIC
iTrader: (9)
your plugs look filthy. you said you installed new coils right?
#22
I could be wrong but I believe if you unplug the MAF sensor and the car doesn't cut off within 30 seconds or so, that means the MAF sensor is bad. Again, I may be wrong. I just know one time I forgot to plug mine in and when I started it it cut off 30 seconds or so later and my MAF sensor was good.
#23
Modulated Moderator
iTrader: (3)
Do you have a scanner ..... It appears to be running abnormally rich by looking at the plugs. If you check the LT and ST fuel trims and look at MAF and O2 sensor data it might help. Other than that I would take it out someplace and drive the **** out of it and see if that helps.
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