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> New TPS circuit boards $35, Courtesy of Dave Sprinkle
srb7f
post Sep 4 2009, 10:22 PM
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I just want to give a shout out to Dave Sprinkle who is now making brand new TPS circuit boards for the 914 FI system.

This is seriously the best $35 I've spent on the 914 in as long as I can remember. It's a simple installation with the included instructions, and only took me about 30 minutes. After this, all of the jerkiness in the acceleration was gone just like that.

A new TPS is NLA, and cost about $150+ last I checked when they were available. This $30 part restores the switch, so get one while you can.

This will certainly keep me happy with my 2.0 until I have the time and $$ to convert to a 6!
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Dr Evil
post Sep 5 2009, 12:59 AM
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Badass! Way to go Dave (IMG:style_emoticons/default/smile.gif)
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saigon71
post Sep 5 2009, 06:53 AM
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Steve:

This is great news! (IMG:style_emoticons/default/aktion035.gif) What is Dave's "handle" on this forum. I would like to order one.

Thanks,
Bob
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jimkelly
post Sep 5 2009, 07:14 AM
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now THAT is truly stepping up to the plate - wow

http://www.914world.com/bbs2/index.php?showuser=2943
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saigon71
post Sep 5 2009, 07:18 AM
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QUOTE(jimkelly @ Sep 5 2009, 09:14 AM) *

now THAT is truly stepping up to the plate - wow

http://www.914world.com/bbs2/index.php?showuser=2943


Thanks Jim. Just sent email.
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zymurgist
post Sep 5 2009, 09:27 AM
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I got mine yesterday. Thanks Dave! (IMG:style_emoticons/default/smilie_pokal.gif)

Now it's on my "to do" list for this long weekend.
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srb7f
post Sep 5 2009, 10:42 AM
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Amazing, no doubt. I can do just about anything in terms or wrenching on these cars, but generating one of these circuit boards is definitely out of the prowess of an amateur mechanic like myself.
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gothspeed
post Sep 6 2009, 11:22 AM
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I need one of these ....... this will work on the 1.7 D-Jet also right ...... (IMG:style_emoticons/default/smile.gif)??
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jsayre914
post Sep 6 2009, 11:41 AM
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pm sent (IMG:style_emoticons/default/biggrin.gif)
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914four
post Sep 6 2009, 11:51 AM
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QUOTE(srb7f @ Sep 4 2009, 11:22 PM) *


It's a simple installation with the included instructions, and only took me about 30 minutes. After this, all of the jerkiness in the acceleration was gone just like that.


I received my TPS circuit board and plan to install it today. The instructions do not say to remove the TPS. Step one says to remove the cover and step 2 is to drill out the rivet. I'm not sure it is possible to drill out the rivet while the TPS is installed.

My questions are:

1.) Do you completely remove the TPS ?

2.) Do you have to recalibrate the TPS after this procedure?
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davesprinkle
post Sep 6 2009, 09:39 PM
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QUOTE(PH1 @ Sep 6 2009, 10:51 AM) *

QUOTE(srb7f @ Sep 4 2009, 11:22 PM) *


It's a simple installation with the included instructions, and only took me about 30 minutes. After this, all of the jerkiness in the acceleration was gone just like that.


I received my TPS circuit board and plan to install it today. The instructions do not say to remove the TPS. Step one says to remove the cover and step 2 is to drill out the rivet. I'm not sure it is possible to drill out the rivet while the TPS is installed.

My questions are:

1.) Do you completely remove the TPS ?

2.) Do you have to recalibrate the TPS after this procedure?

Kelvin has correctly identified a weakness in the instruction sheet. (Thanks, Kelvin.) Yes, the first step should be: remove the TPS from the throttle body.

Obviously, reinstallation will require that you follow the TPS calibration procedure. (My understanding is that it can be found on the Pelican site.)

Thanks again for pointing this out, Kelvin. I'll update the installation sheets.

-dave
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davesprinkle
post Sep 6 2009, 09:41 PM
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QUOTE(gothspeed @ Sep 6 2009, 10:22 AM) *

I need one of these ....... this will work on the 1.7 D-Jet also right ...... (IMG:style_emoticons/default/smile.gif)??


Sorry, the 2.0 liter and 1.7 liter sensors are different. I am currently setting up to make the late 1.7 liter boards. Should be a month or so.

How can you tell if you've got an early or late board? The early boards had wires soldered to the board. The late boards have spring-loaded contacts.
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srb7f
post Sep 6 2009, 09:52 PM
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Well, I thought they were great instructions, but I didn't even open them until I got the TPS out on the workbench.
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blitZ
post Sep 7 2009, 07:26 AM
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Beer please...
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I've been trying to sort out some poor idle and hesitation and think it may be my TPS. Is there anyway to determine if it is bad? Visually, it looks fine and I have calibrated it.
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davesprinkle
post Sep 7 2009, 09:07 AM
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QUOTE(blitZ @ Sep 7 2009, 06:26 AM) *

I've been trying to sort out some poor idle and hesitation and think it may be my TPS. Is there anyway to determine if it is bad? Visually, it looks fine and I have calibrated it.


The TPS has two functions:
1. Idle indication. The TPS has two contacts that indicate when the throttle is fully closed. The TPS calibration procedure takes care of this function. Your car will idle poorly if the ECU doesn't know that the throttle is closed.
2. Transient throttle detection. The serrated traces on the board act to detect changes in throttle position so that the ECU can add additional fuel. The car will have poor throttle response if this circuit isn't working properly.

If you've performed the TPS calibration procedure and you still have poor idle, you should verify that your sensor wiring is OK. Check the continuity of the leads from the TPS connector to the ECU connector.
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jim_hoyland
post Sep 7 2009, 09:57 AM
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Get that VIN ?
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Nice update and follow through Dave. Tell me: how is the 1.8 L-Jet TPS different ?
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zonedoubt
post Sep 7 2009, 12:30 PM
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QUOTE(jim_hoyland @ Sep 7 2009, 07:57 AM) *

Nice update and follow through Dave. Tell me: how is the 1.8 L-Jet TPS different ?


It's not a wiper style, just a two-position contact switch.

Attached Image

http://manuals.type4.org/ljet/tests/ljet13.htm
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jsayre914
post Sep 7 2009, 01:11 PM
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Speed Up !!!
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the paypal address you gave me is not working. can you please send me the correct address.

joe
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zymurgist
post Sep 7 2009, 03:05 PM
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I installed the circuit board in Babydoll today and WOW, what a difference! No more bucking! This is the most awesome (and necessary) part I've seen in a long time. Thanks Dave! (IMG:style_emoticons/default/smilie_pokal.gif)

In other news, I'm so happy it came with 2 rivets. I promptly lost one in my kitchen and it still hasn't turned up. (IMG:style_emoticons/default/wink.gif)
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roadster fan
post Sep 7 2009, 03:06 PM
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Project Frankenstein !!!!!!!!
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OT but I have to ask. Are you the Dave Sprinkle I saw the other night on TV that is involved with Motoczysz?

I thought I recognized the name when watching "Birth of a racer" but couldn't remember from where. If it is you, what an amazing company!

Jim
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