Help With Fast Throttle Body

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Jul 8, 2022 | 12:38 PM

Smitty454

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Help With Fast Throttle Body

I bought a used FAST 4150 style throttle body a year or so ago and Im just now getting around to installing it on top of the holley split intake.

I noticed the TPS connector is completely different than my 6.0 LQ9 harness.
The connector on the back which is either the MAP or an IAC valve doesnt match up either.

Do they make different connectors for this throttle body so I can adapt it to my harness?

Jul 11, 2022 | 10:10 PM

tsteel1

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From: Dry Ridge Ky

Check Holley EFI wiring connectors on their site. I think those type of TBs uses a Crysler connector

Jul 12, 2022 | 10:45 PM

Smitty454

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Quote:

Originally Posted by tsteel1

Check Holley EFI wiring connectors on their site. I think those type of TBs uses a Crysler connector

Jul 12, 2022 | 11:24 PM

Smitty454

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From: Phoenix, AZ

I also unplugged these connectors to see if the other ends matched up to my harness but they dont..

My IAC connector has 6 pins but the fast connector only has 4.

My TPS connector is more squared while the fast connector is round.

Am I going to have to cut and splice these pigtails into my harness?

Last edited by Smitty454; Jul 13, 2022 at 12:05 AM.

Jul 13, 2022 | 04:37 AM

Jimbo1367

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I’d get on Holley’s website and look for a pigtail. If not Holley, I’d check ICT Billet or another “LS swap” company.

what brand harness? I’d go to their site and look

Jul 13, 2022 | 11:05 AM

Smitty454

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From: Phoenix, AZ

Quote:

Originally Posted by Jimbo1367

I’d get on Holley’s website and look for a pigtail. If not Holley, I’d check ICT Billet or another “LS swap” company.

what brand harness? I’d go to their site and look

I have a PSI harness.

One way or another I think I'm going to have to cut and splice. Im wondering if I can cut those oddball connectors off and splice in my existing connectors to those pigtails?

Jul 15, 2022 | 04:24 PM

Smitty454

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Joined: Mar 2012

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From: Phoenix, AZ

Does anyone running this throttle body have any suggestions for me? Im not seeing a pigtail that will work with my setup.

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Jul 15, 2022 | 08:26 PM

Smitty454

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Launching!

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From: Phoenix, AZ

Well here is the answer.

HOLY MOSES this is an involved process. I'm second guessing this whole swap all together now. Jesus.

https://www.lt1swap.com/cable_conversion.htm