2001 gs300 aristo swap won't rev past 3000
#1
1999 gs300 aristo swap won't rev past 3000
So I've been trying to iron out the problems since I installed the motor a couple weeks ago. Now I'm stuck with two check engine codes. 21 & 31 I'm in limp mode.
i can buy a new o2 sensor but I'm stumped on this maf problem. I'm getting power to the maf plug, 5 volts with it unplugged. I don't see how the parts all worked before me installing this thing.
i can drive the car just fine but I smell gas if I leave it in park. Shift lock works. Won't rev over 3k. Help!
could it be another sensor causing this ?
thanks
i can buy a new o2 sensor but I'm stumped on this maf problem. I'm getting power to the maf plug, 5 volts with it unplugged. I don't see how the parts all worked before me installing this thing.
i can drive the car just fine but I smell gas if I leave it in park. Shift lock works. Won't rev over 3k. Help!
could it be another sensor causing this ?
thanks
Last edited by AristoJ; 07-20-17 at 07:08 PM. Reason: Wrong year
#2
So I've been trying to iron out the problems since I installed the motor a couple weeks ago. Now I'm stuck with two check engine codes. 21 & 31 I'm in limp mode.
i can buy a new o2 sensor but I'm stumped on this maf problem. I'm getting power to the maf plug, 5 volts with it unplugged. I don't see how the parts all worked before me installing this thing.
i can drive the car just fine but I smell gas if I leave it in park. Shift lock works. Won't rev over 3k. Help!
could it be another sensor causing this ?
thanks
i can buy a new o2 sensor but I'm stumped on this maf problem. I'm getting power to the maf plug, 5 volts with it unplugged. I don't see how the parts all worked before me installing this thing.
i can drive the car just fine but I smell gas if I leave it in park. Shift lock works. Won't rev over 3k. Help!
could it be another sensor causing this ?
thanks
how did you retrieve codes ?
#5
#7
Aristo swap
Did you replace the complete engine, with throttle body , is the tps the same part #. Same amount of wires means its the same , the internal adjustment maybe different. I never did the swap but if everything was good before something is notsending the right data. Connect a fuel pressure guage and monitor it while accelerating at 4000 rpm.
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#8
Did you replace the complete engine, with throttle body , is the tps the same part #. Same amount of wires means its the same , the internal adjustment maybe different. I never did the swap but if everything was good before something is notsending the right data. Connect a fuel pressure guage and monitor it while accelerating at 4000 rpm.
#9
thanks
#10
So I ran 12 volts to the maf sensor close to the plug. It works now. No more cel codes and no more rev to only 3000. I'm grounding out somewhere. So I fixed it. But have to find where I'm grounding out because I'm getting 12 volts when I test right at the ecu.
#11
You answer the question to your problem . dont just add power to the maf check your ecm connection at the connector. power goes to the maf and the o2 sensors from the ecm. dont jump anything make sure your power from the ecm is getting to the required sensors. Also check your ground for the efi system . do you have a wiring diagram ,if so check all your power and ground source before you start the vehicle again. Just be patient check power and ground and you should come up with something positive. good luck. Let me know what you find.
#12
You answer the question to your problem . dont just add power to the maf check your ecm connection at the connector. power goes to the maf and the o2 sensors from the ecm. dont jump anything make sure your power from the ecm is getting to the required sensors. Also check your ground for the efi system . do you have a wiring diagram ,if so check all your power and ground source before you start the vehicle again. Just be patient check power and ground and you should come up with something positive. good luck. Let me know what you find.
#13
I would want to find where im losing the voltage. Disconnect the battery ,unplug the ecm connectors and start tracing the wire with an ohm meter. that same wire send power to the O2 sensors, so pwering up the wire could be dangerous if its grounding out. It not broken if not you will get 0volts. Its probably pinched .You need to get that circuit perfect or you could short out your ecm..
#14
I would want to find where im losing the voltage. Disconnect the battery ,unplug the ecm connectors and start tracing the wire with an ohm meter. that same wire send power to the O2 sensors, so pwering up the wire could be dangerous if its grounding out. It not broken if not you will get 0volts. Its probably pinched .You need to get that circuit perfect or you could short out your ecm..