I've purchased an HP EFI system to replace the EEC-IV on my '92 Mustang. I've been searching & reading on the topic of IAC motors, as well as Ford TFI and having a bit of "information overload syndrome". I've read quite a bit on Ford applications. Based off of what Danny Cabral has said about using the TFI for crank/cam sensor & accuracy issues, and how Holley no longer advocates using the Ford TFI setup, I went with the Holley Dual Sync Distributor, which is plug & play. This eliminates the TFI as well as another wiring adapter.
Along that line of thinking, I started to research wiring for the IAC motor. You read some posts how the Ford IAC is "better", and you read that it isn't. It also appears that if you want to run the Ford style, you have to use up one of the manually configured inputs, and on the HP system there aren't very many. What I decided on is to use a later style GM "push-in" IAC along with a Accufab adapter that makes it, so I can mount the GM IAC to my Ford style TB. This will allow me to use the prewired IAC connector on the HP wire harness. Where the confusion comes in, is about the need to reverse the A & C pins in the connector harness. The specific IAC I'm going to use is a FAST 307059, which is described as "GM LSx Style" IAC. I've read posts about the needed switching of these pins, but I'm confused as to why that would be required if I'm using a GM IAC which this connector is supposed to be configured for? Am I perhaps mixing up instructions somewhere? I guess a better way of asking my question would be, if you have to switch the wires in a prewired harness with a dedicated connector on it, what sensor is this harness designed to work with as "plug & play?"
I want to avoid using up manual inputs and have as few "spliced" connections on my install as possible. I figured that using the Holley Dual Sync distributor and a GM LS style IAC go a long way towards meeting this goal, but I also don't want headaches and end up chasing my tail when it comes time to fire up my project, if there's mistakes in the wiring setup. Do I need to re-pin this connector or not? Sorry for the book post guys, I just want to get this right the first time. Thanks in advance for any input.
Along that line of thinking, I started to research wiring for the IAC motor. You read some posts how the Ford IAC is "better", and you read that it isn't. It also appears that if you want to run the Ford style, you have to use up one of the manually configured inputs, and on the HP system there aren't very many. What I decided on is to use a later style GM "push-in" IAC along with a Accufab adapter that makes it, so I can mount the GM IAC to my Ford style TB. This will allow me to use the prewired IAC connector on the HP wire harness. Where the confusion comes in, is about the need to reverse the A & C pins in the connector harness. The specific IAC I'm going to use is a FAST 307059, which is described as "GM LSx Style" IAC. I've read posts about the needed switching of these pins, but I'm confused as to why that would be required if I'm using a GM IAC which this connector is supposed to be configured for? Am I perhaps mixing up instructions somewhere? I guess a better way of asking my question would be, if you have to switch the wires in a prewired harness with a dedicated connector on it, what sensor is this harness designed to work with as "plug & play?"
I want to avoid using up manual inputs and have as few "spliced" connections on my install as possible. I figured that using the Holley Dual Sync distributor and a GM LS style IAC go a long way towards meeting this goal, but I also don't want headaches and end up chasing my tail when it comes time to fire up my project, if there's mistakes in the wiring setup. Do I need to re-pin this connector or not? Sorry for the book post guys, I just want to get this right the first time. Thanks in advance for any input.
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