New engine won´t rev
11-29-2012, 11:41 AM
#26
Rotary-Power
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That sounds like a fuel and/or spark delivery problem (hardly news though).
Some thoughts:
- validate that the coil harness is plugged into the coils in the right order. Reversing the harness would change what the ECU thinks it's firing and when
- check for a fraying water pump/alternator belt, as frays could be hitting the ESS randomly and randomly screwing up the ESS signal (had this happen before on a different car)
- verify that the engine block ground is clean and secure
- verify that all 4 plugs are still in good condition. They have been known to crack on installation sometimes, though less of a concern if the plugs were installed before the engine was put in
- verify that the injector harness plugs are plug into the correct fuel injectors and something isn't swapped accidentally
Some thoughts:
- validate that the coil harness is plugged into the coils in the right order. Reversing the harness would change what the ECU thinks it's firing and when
- check for a fraying water pump/alternator belt, as frays could be hitting the ESS randomly and randomly screwing up the ESS signal (had this happen before on a different car)
- verify that the engine block ground is clean and secure
- verify that all 4 plugs are still in good condition. They have been known to crack on installation sometimes, though less of a concern if the plugs were installed before the engine was put in
- verify that the injector harness plugs are plug into the correct fuel injectors and something isn't swapped accidentally
11-30-2012, 01:56 PM
#27
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That sounds like a fuel and/or spark delivery problem (hardly news though).
Some thoughts:
- validate that the coil harness is plugged into the coils in the right order. Reversing the harness would change what the ECU thinks it's firing and when
- check for a fraying water pump/alternator belt, as frays could be hitting the ESS randomly and randomly screwing up the ESS signal (had this happen before on a different car)
- verify that the engine block ground is clean and secure
- verify that all 4 plugs are still in good condition. They have been known to crack on installation sometimes, though less of a concern if the plugs were installed before the engine was put in
- verify that the injector harness plugs are plug into the correct fuel injectors and something isn't swapped accidentally
Some thoughts:
- validate that the coil harness is plugged into the coils in the right order. Reversing the harness would change what the ECU thinks it's firing and when
- check for a fraying water pump/alternator belt, as frays could be hitting the ESS randomly and randomly screwing up the ESS signal (had this happen before on a different car)
- verify that the engine block ground is clean and secure
- verify that all 4 plugs are still in good condition. They have been known to crack on installation sometimes, though less of a concern if the plugs were installed before the engine was put in
- verify that the injector harness plugs are plug into the correct fuel injectors and something isn't swapped accidentally
11-30-2012, 08:51 PM
#28
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Data logs are not always useful, but they never hurt. To a 30 second (if you can get it to idle that long without touching the throttle) log at idle once it's warm, logging RPM, short term fuel trim, long term fuel trim, MAF, AFR/lamba or at least O2 volts bank 1 sensor 1 (depending if your app supports the conversion to AFR or lamba). Set it to log as fast as possible.
12-04-2012, 08:59 AM
#31
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Data logs are not always useful, but they never hurt. To a 30 second (if you can get it to idle that long without touching the throttle) log at idle once it's warm, logging RPM, short term fuel trim, long term fuel trim, MAF, AFR/lamba or at least O2 volts bank 1 sensor 1 (depending if your app supports the conversion to AFR or lamba). Set it to log as fast as possible.
P0301
P0410
P0172
P0000
P0300
U0073
And why does the fan near the right suspension start, when they put the key to "on" position?
12-04-2012, 03:07 PM
#32
Rockie Mountain Newbie
That "fan" is actually part of your Air injection system, which is trouble code P0410, so you have a problem with that circuit. Its supposed to turn on during a cold start, so that's normal.
You have misfire codes, P0300 and P0301.
You have a problem with your O2 sensor circuit, P0172.
I would recommend you go back over your engine replacement, make sure the harnesses are properly connected (unhook everything, and reconnect it, just to be safe), remove the plugs and make sure the trailing plugs are in the correct position, and the coils are hooked up to the correct plugs. You could even try swapping the coil positions to see if the misfire code follows the coils (switch both front coils to the rear position).
If its still having troubles after that, then you might as well test the compression on that front rotor. Since you installed a used engine, I would say that you picked a bad one.
BC.
You have misfire codes, P0300 and P0301.
You have a problem with your O2 sensor circuit, P0172.
I would recommend you go back over your engine replacement, make sure the harnesses are properly connected (unhook everything, and reconnect it, just to be safe), remove the plugs and make sure the trailing plugs are in the correct position, and the coils are hooked up to the correct plugs. You could even try swapping the coil positions to see if the misfire code follows the coils (switch both front coils to the rear position).
If its still having troubles after that, then you might as well test the compression on that front rotor. Since you installed a used engine, I would say that you picked a bad one.
BC.
12-05-2012, 05:16 AM
#33
Rotary-Power
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That "fan" is actually part of your Air injection system, which is trouble code P0410, so you have a problem with that circuit. Its supposed to turn on during a cold start, so that's normal.
You have misfire codes, P0300 and P0301.
You have a problem with your O2 sensor circuit, P0172.
I would recommend you go back over your engine replacement, make sure the harnesses are properly connected (unhook everything, and reconnect it, just to be safe), remove the plugs and make sure the trailing plugs are in the correct position, and the coils are hooked up to the correct plugs. You could even try swapping the coil positions to see if the misfire code follows the coils (switch both front coils to the rear position).
If its still having troubles after that, then you might as well test the compression on that front rotor. Since you installed a used engine, I would say that you picked a bad one.
BC.
You have misfire codes, P0300 and P0301.
You have a problem with your O2 sensor circuit, P0172.
I would recommend you go back over your engine replacement, make sure the harnesses are properly connected (unhook everything, and reconnect it, just to be safe), remove the plugs and make sure the trailing plugs are in the correct position, and the coils are hooked up to the correct plugs. You could even try swapping the coil positions to see if the misfire code follows the coils (switch both front coils to the rear position).
If its still having troubles after that, then you might as well test the compression on that front rotor. Since you installed a used engine, I would say that you picked a bad one.
BC.
Thanks for the help and many thanks to RIWWP also!
12-05-2012, 06:01 AM
#34
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