an RX8er's rebuild thread
#703
the RB one isnt a "problem" just not accurate
I just went for a drive and everything is good to go! It just wont start on its own.
I was thinking this through
if the cobb can connect then the car not starting on its own then is should not be related to canbus (or whatever) issues with the goodbox
so when the starter cranks what tells the ecu to fire that bad boy up? it doesnt sound like there is anyhting wrong, persay, but at the very end of the starter's rotation is sounds like it bogs down....hard to describe...may have to record it...minor I guess
I just went for a drive and everything is good to go! It just wont start on its own.
I was thinking this through
if the cobb can connect then the car not starting on its own then is should not be related to canbus (or whatever) issues with the goodbox
so when the starter cranks what tells the ecu to fire that bad boy up? it doesnt sound like there is anyhting wrong, persay, but at the very end of the starter's rotation is sounds like it bogs down....hard to describe...may have to record it...minor I guess
#710
Gulf Coast Rotaries
iTrader: (1)
I very highly don't think is mechanical , Rotary engine is simple to a point , Gas , Spark, Compression ? If that's all good is something simple your just over thinking it. Your pretty good that's why you can't figure out the simple your more technical . Good luck ,
#711
Registered
iTrader: (3)
there could still be a can bus issue even if the cobb will connect with the ecu. I dont think there is one in this case because it runs well after you get it started.
Sounds like the starter is binding? Or is there enough power to the starter? There may be enough initial power but it may not be flowing well enough.
1- Take the starter apart--its easy and not complicated, so 9K should be able to do it ok
check the brushs etc and clean it up with electronic cleaner. It made a big difference in mine. I found that one brush really wasnt making good contact.
2- no abnormal marks on the starter gear etc--right?
3- check the voltage/amps getting to the starter during cranking--be careful with this and dont blow your meter.
4- how much voltage is in the system after it is running--per Cobb?
5- what voltage is getting to the ect sensor?
I hate these kind of bugs. I still have one that NO ONE including Mazda can figue out.
Sounds like the starter is binding? Or is there enough power to the starter? There may be enough initial power but it may not be flowing well enough.
1- Take the starter apart--its easy and not complicated, so 9K should be able to do it ok
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
2- no abnormal marks on the starter gear etc--right?
3- check the voltage/amps getting to the starter during cranking--be careful with this and dont blow your meter.
4- how much voltage is in the system after it is running--per Cobb?
5- what voltage is getting to the ect sensor?
I hate these kind of bugs. I still have one that NO ONE including Mazda can figue out.
#712
there could still be a can bus issue even if the cobb will connect with the ecu. I dont think there is one in this case because it runs well after you get it started.
Sounds like the starter is binding? Or is there enough power to the starter? There may be enough initial power but it may not be flowing well enough.
1- Take the starter apart--its easy and not complicated, so 9K should be able to do it ok
check the brushs etc and clean it up with electronic cleaner. It made a big difference in mine. I found that one brush really wasnt making good contact.
2- no abnormal marks on the starter gear etc--right?
3- check the voltage/amps getting to the starter during cranking--be careful with this and dont blow your meter.
4- how much voltage is in the system after it is running--per Cobb?
5- what voltage is getting to the ect sensor?
I hate these kind of bugs. I still have one that NO ONE including Mazda can figue out.
Sounds like the starter is binding? Or is there enough power to the starter? There may be enough initial power but it may not be flowing well enough.
1- Take the starter apart--its easy and not complicated, so 9K should be able to do it ok
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
2- no abnormal marks on the starter gear etc--right?
3- check the voltage/amps getting to the starter during cranking--be careful with this and dont blow your meter.
4- how much voltage is in the system after it is running--per Cobb?
5- what voltage is getting to the ect sensor?
I hate these kind of bugs. I still have one that NO ONE including Mazda can figue out.
2) no abnormal marks on the starter I replaced (still having same issues regarless of starter)
3) I will check the starter voltage, how would that blow my meter...like if I put it on miliamps?
4) voltage is 12v
5) havent tested that but when I put in my old senor the readings are correct
ditto, I hope yours doesnt keep you car from starting...lol
![Eyecrazy](https://www.rx8club.com/images/smilies/Eyecrazy.gif)
#715
SARX Legend
iTrader: (46)
• Vacuum leakage
• Air leakage from intake-air system
• Air suction at intake-air system (between MAF sensor and intake ports)
• Air cleaner restriction
• Improper operation of drive-by-wire control system
• Drive-by-wire control system operates in fail-safe function
• Throttle body malfunction (stuck open)
• SSV stuck open
• SSV solenoid valve malfunction (stuck open)
• APV stuck open*
• APV motor malfunction*
• APV position sensor malfunction*
• Poor fuel quality
• Jet air mixing system malfunction (restriction or leakage at air passage)
• Inadequate fuel pressure
• Pressure regulator malfunction (integrated in fuel pump)
• Fuel injector (FP1) (RP1) is clogged.
• Open or short in fuel injector (FP1) (RP1) control signal circuit
• Restriction in exhaust system
• Purge solenoid valve malfunction (stuck open)
• Improper air/fuel ratio control (abnormal ECT signal to PCM)
• Erratic signal form eccentric shaft position sensor
• MAF sensor contamination (abnormal signal to PCM)
• MAF sensor improper installation
• Low engine compression
– Engine internal malfunction
– Abnormal engine oil condition (viscosity, deterioration)
– Low oil pressure
– Excessive fuel pressure
– Air mixed in oil line
– Metering oil pump malfunction
• Leakage or clogging in oil pipe
• Leakage or clogging in oil nozzle
• Starting system malfunction
• Spark leakage from high-tension leads
• Spark plug malfunction
Warning
The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system:
• Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.
(See BEFORE REPAIR PROCEDURE.)
(See AFTER REPAIR PROCEDURE.)
Caution
• Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.
• Air leakage from intake-air system
• Air suction at intake-air system (between MAF sensor and intake ports)
• Air cleaner restriction
• Improper operation of drive-by-wire control system
• Drive-by-wire control system operates in fail-safe function
• Throttle body malfunction (stuck open)
• SSV stuck open
• SSV solenoid valve malfunction (stuck open)
• APV stuck open*
• APV motor malfunction*
• APV position sensor malfunction*
• Poor fuel quality
• Jet air mixing system malfunction (restriction or leakage at air passage)
• Inadequate fuel pressure
• Pressure regulator malfunction (integrated in fuel pump)
• Fuel injector (FP1) (RP1) is clogged.
• Open or short in fuel injector (FP1) (RP1) control signal circuit
• Restriction in exhaust system
• Purge solenoid valve malfunction (stuck open)
• Improper air/fuel ratio control (abnormal ECT signal to PCM)
• Erratic signal form eccentric shaft position sensor
• MAF sensor contamination (abnormal signal to PCM)
• MAF sensor improper installation
• Low engine compression
– Engine internal malfunction
– Abnormal engine oil condition (viscosity, deterioration)
– Low oil pressure
– Excessive fuel pressure
– Air mixed in oil line
– Metering oil pump malfunction
• Leakage or clogging in oil pipe
• Leakage or clogging in oil nozzle
• Starting system malfunction
• Spark leakage from high-tension leads
• Spark plug malfunction
Warning
The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system:
• Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.
(See BEFORE REPAIR PROCEDURE.)
(See AFTER REPAIR PROCEDURE.)
Caution
• Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.
#719
Modulated Moderator
iTrader: (3)
Re-thinking the basics and starting from square one and verifying things is the only thing that is going to work except blind luck
![Wink](https://www.rx8club.com/images/smilies/wink.gif)
Fuel pressure?
Spark tested?
Throw a timing light on the wires and see if you are getting a strong spark?
MAF voltage and other sensor values off the AP?
Your voltage should be a bit higher than 12.0 v with a good battery. Have you tried using a jump battery for extra oomph to see if that helps?
What are you using for coils?
#722
Modulated Moderator
iTrader: (3)
It will start fine with the APV's open or closed......all you need is Leading coils and P1 fuel injection to start...
Did you check the ECU connections? Pull the plugs and reconnect them and see if that helps. I had a strange problem with mine that turned out to be one of the plugs not being seated properly
#723
Modulated Moderator
iTrader: (3)
Basically that is a go/no go for the starter circuit..so if it cranks it should be OK> If the pedal switch fails it can cause a hunting idle...but it will still start and run
Is your motor ported? Mine wouldn't run without tuning after....it took some extra fuel and increased idle RPM to be truely happy. It did start up OK though
![Frown](https://www.rx8club.com/images/smilies/frown.gif)
#724
I don't...and not sure why porting would cause that CEL
Re-thinking the basics and starting from square one and verifying things is the only thing that is going to work except blind luck![Wink](https://www.rx8club.com/images/smilies/wink.gif)
Fuel pressure?
Spark tested?
Throw a timing light on the wires and see if you are getting a strong spark?
MAF voltage and other sensor values off the AP?
Your voltage should be a bit higher than 12.0 v with a good battery. Have you tried using a jump battery for extra oomph to see if that helps?
What are you using for coils?
Re-thinking the basics and starting from square one and verifying things is the only thing that is going to work except blind luck
![Wink](https://www.rx8club.com/images/smilies/wink.gif)
Fuel pressure?
Spark tested?
Throw a timing light on the wires and see if you are getting a strong spark?
MAF voltage and other sensor values off the AP?
Your voltage should be a bit higher than 12.0 v with a good battery. Have you tried using a jump battery for extra oomph to see if that helps?
What are you using for coils?
I will get a timing light from my neighbor but I tested 1 coil gounded on the frame and it fired (not comprehensive I know)
you will have to excuse my ignornace on what all datalog stuff means so I will just go get some data, post and then take direction on what this data means
#725
SARX Legend
iTrader: (46)
I can bring my timimng light over. I only mentioned the APV because the manual listed it as a possible cause for hard starts/no starts.
The ECU connections are good, and the connections to the vacuum solenoids are good, we tried that. I will have to check out the APV code then because the three of us who are ported have that APV stuck open code.
The ECU connections are good, and the connections to the vacuum solenoids are good, we tried that. I will have to check out the APV code then because the three of us who are ported have that APV stuck open code.