This a post of the instructions that Pepe sent me. I thought that you guys might want to keep in your computers a copy of the step-by-step instructions for the throttle body (TB) installation.

ProFlowDesigns will send you instructions but these will be more accurate.


Tools needed:

-Philips screwdriver
-Pick
-Digital Voltmeter (to measure DC V)
-12mm long or short with extension with ratchet wrench
-pliers.


1. Wait until the car is cool. Start by removing the air filter and rubber hose that connects it to the TB.

2. Before disconnecting any hose or plug you will need to measure the voltage at the stock TB TPS sensor. For this you will need a digital voltmeter that can measure DC volts.

The TPS sensor is the one on the side that has a three-cable plug. Slide the voltmeter probes through the rubber seal at the plug top and middle cable so you can get a reading with the keys at the ON position but engine not running. Do not disconnect the plug.

The voltage should be around 4.75V DC. If you open the throttle to WOT it should go down to around .5V DC.

Write down the voltage reading with the throttle completely closed. If you had problems getting a reading by sliding the probes through the seals use a pick to pull the seals out and you will have better access to where the cable meet the terminals.

3. Remove the two coolant lines at the bottom on the TB. Use the pliers to rotate the line if they are freeze. I found that they are better to remove at the tubes that are not on the TB.

4.Disconnect the TPS sensor and the MAP sensor (one on top of the TB) plugs.

5. To disconnect the throttle cable open the throttle completely so you create slack on the cable then slide it out.

6. Remove the four 12mm bolts and nuts fixing the TB to the intake manifold.

7. The TB should be now free. Be careful when pulling it out. You have to reuse the stock gasket.

8. With the stock TB out remove the MAP sensor plastic thing on top with two Philips screws and re-install on new TB. Be careful not to loose the o-ring on the bottom of the MAP sensor. It could be attached to the MAP or left on the stock TB.

9. Re-install on new TB coolant lines under the TB (coolant bypass). Unless you left these attach to the other tubes.

10 install new TB and torque 12mm nuts and bolts in a cross pattern. You don't need a torque wrench for this. Hand tight.

12. Connect coolant hoses under the TB.

13. Connect MAP sensor plug to the sensor

14. Connect TPS sensor plug to the sensor

15. Re-attach throttle cable by doing the same procedure for taking it out.

16. Connect the filter and rubber hose to the TB.

17. Measure voltage in the same two cables and check that it's the same or very close. You will be able to adjust the TPS sensor with an Allen wrench (standard size). Loose the two Allen bolts and rotate TPS to achieve correct voltage. After adjusting TPS voltage, If you pulled the seals at the plug push them in again.

18. Open the 12mm bleed bolt for the cooling system and add coolant or water to the radiator. Once you see coolant running steady out of the bleed bolt close it (hand tight- do not over torque). You need to do this because you will loose some coolant when removing the coolant bypass lines under the TB. Probably will need very little.

19. Start the car. Idle will be a little erratic at first but let it run for a couple of minutes. It should smooth out as the car is re-adjusting the idle for the new increase airflow.

20. Let the car idle until the fans come on. Also check for leaks. Check the temperature gauge. If you see it rising beyond 3 bars stop the engine and check for leaks. If the car idle is not normalize after 3 minutes check that the TB is well seated in the intake manifold.

Once you are sure that there are no coolant leaks and the car idles factory you can test the car.


If you encounter problems please contact ProFlowDesigns and let them know.

 

Thanks for that post which I saved, but some things might have to be clarified. In looking at the S2K TPS, there are no allen bolts and it does not appear that the unit can be rotated. Also, the manual states the tps is not replaceable apart from the tb, and any time voltages or resistances are out of spec, the manual says to replace the whole tb. The hardware mounting the tb look like rivets. Perhaps these are instructions for Honda TBs in general?

 

Now I'm confused, do I or don't I need a meter?
JohnA

 

[QUOTE]Originally posted by Prolene:
[B] Thanks for that post which I saved, but some things might have to be clarified.

 

I have both mods on my car. The manifold improves also the throttle response across the whole range. Just don't expect massive gains.

But there is a catch. It's very, VERY, difficult to remove the stock one and re-install the modify manifold. If you don't have a good set of tools forget about doing it.

If you need more info on the results e-mail me at pepe@casiano.com.

 

Prolene, the TPS to TB connection is originally done with threaded fasteners as well, weird tamper-proof looking ones (Torque-Rite). I know of others who have simply cut slots in the heads of the stock screws and reused them. Apparently Proflow replaces them with Socket Button Head Cap Screws, nice touch

 

[QUOTE]Originally posted by RT:
[B]Apparently Proflow replaces them with Socket Button Head Cap Screws, nice touch

 

For those who have had their throttle body bored; have any of you had any idle problems (such as uneven, eratic idling) after making this kind of modification? i personally have no experience with this kind of modification, but have heard that idle problems can result...let me know.

 

For those who have had their throttle body bored; have any of you had any idle problems (such as uneven, eratic idling) after making this kind of modification? i personally have no experience with this kind of modification, but have heard that idle problems can result...let me know.

 

Heff, couple things that could cause idle prob post TB bore are:

TPS set different from original at idle,

New butterfly not sealing the new bore.

I'm sure there are other things too, but these seem the most likely.