This is posted on yotatech but I am getting very little response there so I figured I would post it here and see what help I may get.
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I know that this topic has been beaten up but I feel that my situation may be a bit unique.
Here's the deal, it's an 1988 4runner with the 22re motor. The motor is more or less brand new and has been rebuilt by myself. The motor has a 268 cam, engnbldr RV head, LCE headers and has been bored .03 over. None of this should take into affect on how the motor actually idles or runs with the exception of the cam. The motor also has new spark plugs, cables, cap, rotor, fuel filter, throttle position sensor, afm, o2 sensor, knock sensor, air filter, coolant temp sensor, and every sensor on the motor that can be tested via the FSM has been tested and checks out okay.
A little history that may be important: The original motor in this 4runner was a 22re motor. The p/o did a rte swap, after it spun a rod bearing I rebuilt a 22re motor and put the drive train back to stock (the reason for all the new sensors).
I have about 3300 miles on this motor and it has run great except for horrible gas mileage. I chaulked that up to the fact that I was still using the 22rte ecu. I was still using the 22rte ecu because I didn't have a new knock sensor for the 22re ecu. When using the 22rte ecu the motor ran good except it felt like I was getting fuel cut at 4000 RPM's. Now I have the 22re knock sensor and plugged in the 22re ecu (yes, it's the proper year and transmission ecu), and it runs like garbage!
I'm not getting any CEL with either ECU plugged in. I would just keep running the RTE ecu but I don't like that my motor bogs down at 4k rpm.
The throttle body has been adjusted per the FSM, the timing is dead nuts on at 5* with the diag port jumpered, good oil pressure, engine comes up to temp fine. Adjusting the idle doesn't seem to have any real affect on how it runs.
Here is where the experts chime in... I have built the motor by the FSM and tested EVERY sensor as per the FSM. To my knowledge, the elec and efi circuits/wiring are perfectly good and operating within range.
Forgot to mention:
I have new ground wires throughout the motor, the EGR has been deleted along with ALL vacuum lines with the exception of the fuel pressure regulator, charcoal canister and the brake booster. All other vacuum ports have been capped off and I do not have any known vacuum leaks.
I guess I should explain more than "it runs like garbage"!
When using the RE ecu, the motor idles VERY rough at about 500-700 RPM, the idle adjustment screw on the throttle body has no affect at all. When I give it gas it will stumble and hesitate to raise RPM's and when it does it will bog down at anywhere between 2500-3000 RPM. When it does bog down I hear like a weird hollow sound coming from the AFM. I'm assuming that is because the door in the AFM is suddenly closing and I'm hearing a vacuum coming from the AFM... maybe?
****
I know that this topic has been beaten up but I feel that my situation may be a bit unique.
Here's the deal, it's an 1988 4runner with the 22re motor. The motor is more or less brand new and has been rebuilt by myself. The motor has a 268 cam, engnbldr RV head, LCE headers and has been bored .03 over. None of this should take into affect on how the motor actually idles or runs with the exception of the cam. The motor also has new spark plugs, cables, cap, rotor, fuel filter, throttle position sensor, afm, o2 sensor, knock sensor, air filter, coolant temp sensor, and every sensor on the motor that can be tested via the FSM has been tested and checks out okay.
A little history that may be important: The original motor in this 4runner was a 22re motor. The p/o did a rte swap, after it spun a rod bearing I rebuilt a 22re motor and put the drive train back to stock (the reason for all the new sensors).
I have about 3300 miles on this motor and it has run great except for horrible gas mileage. I chaulked that up to the fact that I was still using the 22rte ecu. I was still using the 22rte ecu because I didn't have a new knock sensor for the 22re ecu. When using the 22rte ecu the motor ran good except it felt like I was getting fuel cut at 4000 RPM's. Now I have the 22re knock sensor and plugged in the 22re ecu (yes, it's the proper year and transmission ecu), and it runs like garbage!
I'm not getting any CEL with either ECU plugged in. I would just keep running the RTE ecu but I don't like that my motor bogs down at 4k rpm.
The throttle body has been adjusted per the FSM, the timing is dead nuts on at 5* with the diag port jumpered, good oil pressure, engine comes up to temp fine. Adjusting the idle doesn't seem to have any real affect on how it runs.
Here is where the experts chime in... I have built the motor by the FSM and tested EVERY sensor as per the FSM. To my knowledge, the elec and efi circuits/wiring are perfectly good and operating within range.
Forgot to mention:
I have new ground wires throughout the motor, the EGR has been deleted along with ALL vacuum lines with the exception of the fuel pressure regulator, charcoal canister and the brake booster. All other vacuum ports have been capped off and I do not have any known vacuum leaks.
I guess I should explain more than "it runs like garbage"!
When using the RE ecu, the motor idles VERY rough at about 500-700 RPM, the idle adjustment screw on the throttle body has no affect at all. When I give it gas it will stumble and hesitate to raise RPM's and when it does it will bog down at anywhere between 2500-3000 RPM. When it does bog down I hear like a weird hollow sound coming from the AFM. I'm assuming that is because the door in the AFM is suddenly closing and I'm hearing a vacuum coming from the AFM... maybe?
