351 EFI air pump...
#1
#2
Join Date: Jun 2006
Location: Ottawa, Ontario
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No but I'll play along.
Are you installing the motor with the EFI system? If so you can remove the pump and associated plumbing, but you have to plug the holes in the heads and leave the TAB and TAD solenoids on the motor and electrically connected but with the vacuum lines capped. These are the parts on the bracket next to the coil. There is ZERO performance gain from removing this system, but it will tidy the engine bay. You'll want to keep the EGR, it helps milage.
Are you installing the motor with the EFI system? If so you can remove the pump and associated plumbing, but you have to plug the holes in the heads and leave the TAB and TAD solenoids on the motor and electrically connected but with the vacuum lines capped. These are the parts on the bracket next to the coil. There is ZERO performance gain from removing this system, but it will tidy the engine bay. You'll want to keep the EGR, it helps milage.
#3
#4
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 30,953
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On a cold start the computer is running in open loop and ignores the O2 sensor, the thermactor system is designed so it only injects air into the heads before the engine warms up. Once the motor reaches operating temperature the computer goes closed loop and starts taking readings from the O2 sensor, and it then switches the air injection to go either directly into the cat or to atmosphere.
#5
Conanski
Need your input, I'm running a 1990 EFI in my '50 F1 on which I removed the EGR, by welding the return line closed. I also recently removed the air pump, solenoids and all. Today I started the engine, and it idles high, and seems to miss slightly. I have plugged the vacumn lines where the air pump fed ; do I have to re-instal the solenoids to even out the idle, or can the engine be tuned to adjust the idle?
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