|
I have developed a strange high idle problem with my b230ft engine.
I was going through a base idle set as per FAQs and numerous archive postings, I did timing check(set from 10deg to 12deg), air leak check(all ok) and when I got to grounding the AIC motor test point (red/white wire in pigtail) to set base rpms It had no effect.
Keep in mind I had no previous problems with this component of my engine before this operation and had installed a new AIC only two years ago. The rpms will not level out to 800-900 or so where it lived before but stay at 1600.
Tapping on the body of the AIC would lower the idle speed(gradually) so I doubted the condition of the internal motor may be sticking in a worn ring groove.
Disassembly showed no wear and clean as a whistle. Reassembly, the motor worked with jumper wires in both open and closed positions easily, resistance between terminals was within spec. OK
At the AIC electrical connector I have voltage of 12-13V(system voltage) on both side terminals so I know it's not a bad wiring situation. But neither signal will vary or oscilate under any circumstances both equal. ECU problem I don't know.
I should note I have no A/C belt connected(AC no longer works) so that extra engine load is not a factor. I turned on every electrical load, high beams, defrost, blower at high, radio etc. and car seemed to keep up fine with demand.
Am I correct to assume that the AIC is really there to even out A/C loads?
I am considering just running with the AIC still in the airstream circuit but unplugged electrically.
Could I pull this off, dammage my ECU, be in danger of AIC moving to fully open from vibration =2000+rpm!! at idle.
I'm really unsure where to go from here and don't have the kind of cash to buy things like ECUs. Any and all help will be benficial and appreciated.
1986 740 B230FT 352k kms
|
