SRT-4 60mm TB installation how to guide

Written by Nivo and SRTgurl from www.srtgurl.com

LFS 60mm Throttle Body Installation

Thank you for purchasing the LFS Throttle Body for your Dodge SRT4. This Throttle body is easy to install and will give you years of reliability and performance.

To Install:

1. Start off by removing the negative battery terminal (10mm).

2. Remove Intake air box and/or aftermarket intake.

3. Pull off the vacuum line on the stock adapter plate (If you purchased the 60mm Adapter plate from us)

4. Disconnect the TPS connector (off white color)

5. Disconnect the IAC connector (black color)

6. Disconnect the Inlet Air Temperature (IAT) sensor connector on the cold side intercooler pipe.

7. Pull off the red hard plastic line going to the cold side intercooler pipe.

8. If you have the stock cold side pipe from the intercooler to the throttle body there will be (2) standard worm screw type clamps, they are 8mm or you can use a flat head screw driver to undo them. T-Bolt clamps are usually 7/16” for those using them for aftermarket pipes.

9. At this point you may want to disconnect your vacuum line to your Blow Off Valve that is on your aftermarket pipe if so equipped.

10. Now we are ready to remove the cold side intercooler pipe, remove now.

11. The throttle body is attached by (2) 10mm bolts that go through both, the throttle body and the adapter sandwiched between the throttle body and intake manifold. Remove the bolts now.

12. Remove the (2) 10mm bolts holding the throttle cable to the throttle body.

13. Remove the throttle cable off the throttle linkage, you may need to open the throttle plate up to get enough slack. Align the cable with the slot and pull up on the cable to get the barrel out.

14. Now you should be able to pull out your whole Throttle body.

15. Now you should be able to pull off your stock adapter plate (If you purchased the 60mm Adapter plate from us)

16. You will need the following from the stock Throttle Body:

· TPS (Throttle Position Sensor)

· O-ring from stock TPS

· IAC (Idle Air Control)

17. Notice that the TPS and the IAC have torx screws. (1) on the IAC and (2) on the TPS. I used a 1/8” Allen wrench to take those off if you do not have the correct torx bit.

18. IAC - Use a bit of WD-40 on the IAC O-ring so it slides into its new home on the LFS Throttle Body. Use the new screw supplied (3mm allen wrench)

19. TPS – Insert the TPS O-ring into position, place the TPS onto the LFS throttle body connector side facing out towards the opening. Use the screws (2) and washers supplied to mount the TPS onto the throttle body. Use a 3mm allen wrench to tighten down.

20. Attach the throttle cable bracket onto the LFS throttle body using the stock (2) 10mm bolts

21. If you purchased the Optional LFS 60mm adapter plate then you will also need the large O-ring found on the stock adapter plate, remove it from the stock adapter and install it on the LFS 60mm unit. Install the LFS adapter plate if purchased. Use a bit of WD-40 to aid in installation onto the intake manifold.

22. Install stock adapter plate if no purchase of the LFS 60mm adapter plate was made.

23. Install throttle body and insert the long allen head bolts through both the LFS throttle body and the adapter plate. Tighten the (2) bolts using a 6mm allen wrench. Use a modified stock gasket or use some gasket silicone sealant that can resist oil.

23. Install Throttle cable on throttle linkage..

24. Reinstall cold side intercooler pipe. Sometimes this can be tricky depending on what pipe you are using. Stock and aftermarket ones will fit but they do take a bit of extra effort installing. If you are having trouble I found it a bit easier to disconnect the bottom of the pipe where it attaches to the intercooler. Installing it as much as you can on the lower side of the TB then you can use a small screw driver and insert it between the TB and the pipe and lightly pry so it lifts the pressure pipe up and over the TB lip. If you are using the stock one remove the staple that holds the stock clamp in place as the back side of the staple will mar and cause installing the pressure pipe difficult. Also if you have 2.5 inch T-bolt clamps you might find it difficult to get the bolts started. I know on the Exhaust Depot hardpipes I couldn't get it started but I was able to use it with the stock pressure pipe and my ATP pressure pipe. I completely removed the nut wraped it around the pipe and then squeezed the clamp enough just to barely get the nut threaded on and then tightened it up.

WARNING!!!!!!!! DO NOT PLACE ANY PART OF THE ACTUAL CLAMP ON THE SIDE OF THE THROTTLE LINKAGE THIS CAN CAUSE THE LINKAGE TO GET STUCK ON THE CLAMP CAUSING THE THROTTLE TO BE HELD WIDE OPEN. MAKE SURE THAT THE CLAMP PART IS ON THE FRONT SIDE OF THE HOSE WHICH IS CLOSE TO THE RADIATOR.

26. Reconnect the sensors: TPS, IAC, IAT

27. Reconnect your vacuum lines and intake/air box.

28. Make sure everything is nice and snug, plug battery back up and make sure the car starts and runs fine. Check if idle is 750-850 rpm’s while warm at idle.

29. ALL CURRENT ORDERS HAVE LOCTITE ON THE SET SCREW you no longer need to do this part when installing the TB. But if you want to adjust the throttle for any reason read below.

To adjust the idle if you need to just open the throttle manually using the throttle attachment part or have a friend step on the gas it will be easier this way. Then just adjust it with the 1/8 allen wrench higher or lower if needed 99 percent of the cars won't have to do anything. Just becareful if you go too low the throttle might stick a little bit so do not adjust the screw much just ever so slightly till it's perfect. Once it's perfect loctite it in place.

Have fun and enjoy your new found performance

-Lorenzo's Fuel Systems-