 flat spot in RPM |
|
|
|
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. |
|
|
  |
| ynotdd |
 Aug 20 2003, 08:24 AM
Post
#1
|
|
Member  Group: Members Posts: 156 Joined: 13-January 03 From: plainview, NY Member No.: 140  |
I have a 73 914 2.0. The engine has less than 1000 miles since rebuilt. I have a problem at about 3600 to 4000 rpm it falls on its face then once passed that to pulls fine. I have replaced the throttle switch, pressure sensor, injectors, points, condenser etc. problem still there all i can think of is temp sensorII or vac lines. please help. Tony:confused: :mad: (IMG:style_emoticons/default/sad.gif)
|
   |
 
|
| Brad Roberts |
Aug 20 2003, 12:24 PM
Post
#2
|
|
914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Did they resuse the stock (probably worn out) distributor ??
I say dump the points... but I need to know if the timing mark shows up nicely when you time it..or if it is bouncing around when your trying to time it. B |
|
|
|
| ynotdd |
Aug 20 2003, 12:27 PM
Post
#3
|
|
Member Group: Members Posts: 156 Joined: 13-January 03 From: plainview, NY Member No.: 140 |
the marks were solid no bouncing (IMG:style_emoticons/default/smash.gif)
|
|
|
|
| Brad Roberts |
Aug 20 2003, 12:29 PM
Post
#4
|
|
914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Where did this "new" pressure sensor come from ??
Dump the points.. not worth keeping them. B |
|
|
|
| nebreitling |
Aug 20 2003, 02:23 PM
Post
#5
|
|
Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
i'm having these same exact symtoms -- my flat spot is at ~4600rpm. pulls great beyond that (although i cant' get it past that spot in 4th or 5th gear). MPS checks out okay, TPS seems clean enough, engine runs great otherwise. all electrical grounds cleaned. as soon as i get some time, i'm going to have a good going through of the distributor. i've been told that slop from a worn distributor shaft can cause this. as long as i'm at it, i'm going to install a crane pointless ignition. $90 on summitracing.com.
let me know if you resolve this, i'll do the same. nathan |
|
|
|
| ynotdd |
Aug 20 2003, 03:57 PM
Post
#6
|
|
Member Group: Members Posts: 156 Joined: 13-January 03 From: plainview, NY Member No.: 140 |
The PS was from dont yell AA
put the old one back no change |
|
|
|
| Brad Roberts |
Aug 20 2003, 06:05 PM
Post
#7
|
|
914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
These issues are tough.. it could be fuel related or ignition related. I tend to believe its ignition related. You could have a bad spark plug wire or somebody could be running the fuel pump off the coil (robbing voltage for both).
B |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 11th May 2024 - 07:40 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.