 Misc D-Jet Questions |
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| saigon71 |
 Nov 24 2009, 03:17 PM
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#1
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Senior Member  Group: Members Posts: 1,999 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region 
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If I understand correctly, the knob on the ECU adjusts mixture. Which direction do you turn the knob to make it run richer or leaner?
I have read that the you should hear 20 clicks from the TPS from closed throttle to open throttle. I hear none - is my TPS faulty? Thanks. Bob |
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| SirAndy |
Nov 24 2009, 03:40 PM
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#2
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Resident German Group: Admin Posts: 41,641 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(saigon71 @ Nov 24 2009, 01:17 PM)  If I understand correctly, the knob on the ECU adjusts mixture. Which direction do you turn the knob to make it run richer or leaner? I have read that the you should hear 20 clicks from the TPS from closed throttle to open throttle. I hear none - is my TPS faulty? The TPS only has a few contacts, can't remember how many, but much less than 20. More like 5 clicks, if you can even hear them. http://www.pelicanparts.com/techarticles/9...alibrate_20.jpg http://members.rennlist.com/pbanders/djetparts.htm The ECU knob is only for the IDLE mixture ... (IMG:style_emoticons/default/bye1.gif) Andy |
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| SirAndy |
Nov 24 2009, 03:44 PM
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#3
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Resident German Group: Admin Posts: 41,641 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
I guess i was wrong. If you count the on/off individually, you may get 20 "clicks".
I still don't think you can hear those clicking unless you have the TPS open and next to your ear. (IMG:style_emoticons/default/popcorn[1].gif) Andy Attached image(s) 
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| Spoke |
Nov 24 2009, 03:52 PM
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#4
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Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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Yes you should hear clicks. The clicks are the fuel injectors opening and closing as the throttle is opened. It's the FI's way of doing an acceleration pump like carbs. Do this with the engine off obviously.
If you don't hear the clicks, something is wrong. Not necessarily the TPS but it is a good place to start. You can test the TPS with an ohm meter. |
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| SirAndy |
Nov 24 2009, 04:01 PM
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#5
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Resident German Group: Admin Posts: 41,641 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Spoke @ Nov 24 2009, 01:52 PM) Yes you should hear clicks. The clicks are the fuel injectors opening and closing as the throttle is opened. It's the FI's way of doing an acceleration pump like carbs. Do this with the engine off obviously. If you don't hear the clicks, something is wrong. Not necessarily the TPS but it is a good place to start. You can test the TPS with an ohm meter. Aha, so you hear the injectors clicking, not the TPS ... (IMG:style_emoticons/default/idea.gif) |
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| tod914 |
Nov 24 2009, 04:56 PM
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#6
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Advanced Member Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170 |
The 20 clicks you hear will be from the injectors. Key on, slowly depress the pedal with steady pressure and you should hear them. You should also be able to set it up the TPS visually. Most by now will have a wear mark in the intial possition.
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| tod914 |
Nov 24 2009, 04:58 PM
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#7
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Advanced Member Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170 |
lol Andy, you replied quicker than I could respond.
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| McMark |
Nov 24 2009, 05:04 PM
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#8
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
The knob only adjusts idle mixture. If your foot is on the throttle, that knob doesn't change anything. That being said, anti-clockwise is lean, clockwise is rich.
And, as mentioned, you'll only hear clicks if the key is in the on position and the engine is not running. |
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| saigon71 |
Nov 24 2009, 05:08 PM
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#9
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Senior Member Group: Members Posts: 1,999 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region
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QUOTE(SirAndy @ Nov 24 2009, 04:44 PM) I guess i was wrong. If you count the on/off individually, you may get 20 "clicks". I still don't think you can hear those clicking unless you have the TPS open and next to your ear. (IMG:style_emoticons/default/popcorn[1].gif) Andy Thanks for the clarification. I just pulled the cover off and checked. Looks good. Bob |
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| saigon71 |
Nov 24 2009, 05:13 PM
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#10
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Senior Member Group: Members Posts: 1,999 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region
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QUOTE(McMark @ Nov 24 2009, 06:04 PM) The knob only adjusts idle mixture. If your foot is on the throttle, that knob doesn't change anything. That being said, anti-clockwise is lean, clockwise is rich. And, as mentioned, you'll only hear clicks if the key is in the on position and the engine is not running. Thanks McMark - appreciate the info. Bob |
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