 Strange MPS issue, Lew's car |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| 914itis |
 Apr 15 2014, 04:22 PM
Post
#1
|
|
Advanced Member  Group: Members Posts: 2,892 Joined: 9-October 10 From: New York City Member No.: 12,256 Region Association: North East States  |
I am helping Brian with Lew's car. As most of you may know, it is a 2056 with djet.
The car was running fine, he drive it to CT one day and when he came back he noticed that the MPS was hanging. The car starts to run on 3 cylinders with #4 not firing. We checked for spark and injectors they are all fine, but if you remove spark wire #4, it had no effect. The strange thing is if you elevate the mps about 6 inches up, it's all fine, even that 4th cyl works. All the electrical wires on the unit are fine (IMG:style_emoticons/default/confused24.gif) ? Dies the 2056 uses 1.7 or 2.0 MPS? He would like to make it to Hershey. |
   |
 
|
  |
Replies
| TheCabinetmaker |
Apr 28 2014, 06:58 PM
Post
#2
|
|
I drive my car everyday Group: Members Posts: 8,318 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
"Either the wiring of the #4 injector to the MPS, or the #4 injector itself."
Please explain which wire goes from the injector to the mps? Do you mean the ecu? |
|
|
|
| achman_73_2.0 |
Apr 29 2014, 09:16 AM
Post
#3
|
|
Newbie Group: Members Posts: 40 Joined: 28-October 13 From: NYC Member No.: 16,577 Region Association: Upper MidWest |
QUOTE(The Cabinetmaker @ Apr 28 2014, 08:58 PM)  "Either the wiring of the #4 injector to the MPS, or the #4 injector itself." Please explain which wire goes from the injector to the mps? Do you mean the ecu? Sorry, I mean one of the four wires which is plugged into the MPS through the connector. I really don't know where it leads...I'm not really electrically savvy. |
|
|
|
| worn |
Apr 29 2014, 09:49 AM
Post
#4
|
|
can't remember Group: Members Posts: 3,324 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest 
|
QUOTE(achman_73_2.0 @ Apr 29 2014, 07:16 AM) QUOTE(The Cabinetmaker @ Apr 28 2014, 08:58 PM) "Either the wiring of the #4 injector to the MPS, or the #4 injector itself." Please explain which wire goes from the injector to the mps? Do you mean the ecu? Sorry, I mean one of the four wires which is plugged into the MPS through the connector. I really don't know where it leads...I'm not really electrically savvy. The wires go to two coils, one inside the other. So there are 4 ends. All 4 wires go to the ECU aka brain to be used to set the length of injector pulse. It is one really cool analog system for measuring engine load. Incidentally, the plug to the MPS works in either orientation. |
 |
|
| achman_73_2.0 |
Apr 29 2014, 02:32 PM
Post
#5
|
|
Newbie Group: Members Posts: 40 Joined: 28-October 13 From: NYC Member No.: 16,577 Region Association: Upper MidWest |
QUOTE(worn @ Apr 29 2014, 11:49 AM) QUOTE(achman_73_2.0 @ Apr 29 2014, 07:16 AM) QUOTE(The Cabinetmaker @ Apr 28 2014, 08:58 PM) "Either the wiring of the #4 injector to the MPS, or the #4 injector itself." Please explain which wire goes from the injector to the mps? Do you mean the ecu? Sorry, I mean one of the four wires which is plugged into the MPS through the connector. I really don't know where it leads...I'm not really electrically savvy. The wires go to two coils, one inside the other. So there are 4 ends. All 4 wires go to the ECU aka brain to be used to set the length of injector pulse. It is one really cool analog system for measuring engine load. Incidentally, the plug to the MPS works in either orientation. Thanks for explaining. Odd, as when I unplugged MPS and flipped it over and plugged it back in, the car died and wouldn't run. |
|
|
|
Posts in this topic
914itis Strange MPS issue Apr 15 2014, 04:22 PM
r_towle If he lifts up the MPS it runs fine?
Is there oil ... Apr 15 2014, 04:47 PM Jeff Bowlsby a 2.0L MPS is necessary for the 2056 recalibration... Apr 15 2014, 05:01 PM
Mblizzard
a 2.0L MPS is necessary for the 2056 recalibratio... Apr 15 2014, 07:31 PM 914itis I wouldn't say intermittent, it only runs righ... Apr 15 2014, 07:12 PM achman_73_2.0
I wouldn't say intermittent, it only runs rig... Apr 15 2014, 08:54 PM achman_73_2.0
I wouldn't say intermittent, it only runs ri... Apr 15 2014, 08:57 PM 914_teener I have always thought the two MPS bodies of the 1.... Apr 15 2014, 09:25 PM 914itis
I have always thought the two MPS bodies of the 1... Apr 15 2014, 09:40 PM r_towle
I have always thought the two MPS bodies of the ... Apr 28 2014, 10:25 AM achman_73_2.0
[quote name='914itis' post='2025345' date='Apr 15... Apr 28 2014, 02:41 PM 914itis
[quote name='914itis' post='2025345' date='Apr 1... Apr 28 2014, 02:52 PM 76-914 EMF. It's sensitive to spark plug wires. Rerou... Apr 15 2014, 09:33 PM Jeff Bowlsby Those exposed wires in the harness concern me. Br... Apr 15 2014, 10:03 PM Bleyseng
Those exposed wires in the harness concern me. B... Apr 16 2014, 04:01 AM Dave_Darling One curious thing that I found--the MPS can be sen... Apr 16 2014, 08:35 AM achman_73_2.0
One curious thing that I found--the MPS can be se... Apr 16 2014, 10:07 AM Dave_Darling
This all started when I came home from a drive to... Apr 16 2014, 05:08 PM 914itis
This all started when I came home from a drive t... Apr 16 2014, 05:32 PM achman_73_2.0
[quote name='Dave_Darling' post='2025699' date='A... Apr 16 2014, 08:08 PM worn
Pretty bummed, but looks like I may be taking t... Apr 28 2014, 12:06 PM SLITS You need a vacuum pump and volt/ohm meter ........... Apr 16 2014, 11:17 AM 914_teener I would talk to Jeff Bowlsby....
Try and have him... Apr 16 2014, 09:26 PM 914_teener Did you test it as Slit's suggested? Apr 16 2014, 09:31 PM r_towle You are not looking for water in the plenum, you a... Apr 16 2014, 09:48 PM achman_73_2.0 FIXED!
So I was finally able to go to the gar... Apr 28 2014, 07:23 AM r_towle
FIXED!
So I was finally able to go to the ga... Apr 28 2014, 08:23 AM 914itis I read your email late last night. That's grea... Apr 28 2014, 07:28 AM Big Len Glad to hear it !! Apr 28 2014, 07:39 AM Mblizzard Also make sure you are connecting the vacuum corre... Apr 28 2014, 10:18 AM worn
Also make sure you are connecting the vacuum corr... Apr 28 2014, 08:51 PM achman_73_2.0
Also make sure you are connecting the vacuum cor... Apr 29 2014, 09:18 AM 914_teener "I did a lot of inductance graphing and I sus... Apr 28 2014, 02:13 PM 76-914 set your valves 1st, then time it. good job! ... Apr 28 2014, 03:14 PM r_towle Mps has no impact on pinging or detonation. Apr 28 2014, 06:10 PM 914_teener When I read the post and suggestions......there ar... Apr 29 2014, 09:41 AM achman_73_2.0
When I read the post and suggestions......there a... Apr 29 2014, 02:33 PM 914_teener
When I read the post and suggestions......there ... Apr 29 2014, 03:02 PM achman_73_2.0
[quote name='achman_73_2.0' post='2030977' date='... Apr 30 2014, 11:18 AM Dave_Darling The MPS can affect detonation. An overly-lean mix... Apr 29 2014, 12:48 PM achman_73_2.0
The MPS can affect detonation. An overly-lean mi... Apr 29 2014, 02:35 PM r_towle Detonation, or pre-ignition, is typically cause by... Apr 29 2014, 06:02 PM The Cabinetmaker You've had several very knowledgeable people t... Apr 29 2014, 06:15 PM achman_73_2.0
You've had several very knowledgeable people ... Apr 30 2014, 11:22 AM worn
You've had several very knowledgeable people... Apr 30 2014, 11:35 AM achman_73_2.0
[quote name='achman_73_2.0' post='2031371' date='... Apr 30 2014, 05:12 PM |
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 31st October 2024 - 07:26 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.