 1975 1.8 on twin carbs running poorly |
|
|
|
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. |
|
|
| dt4 |
 Oct 4 2020, 09:24 AM
Post
#1
|
|
Senior Member  Group: Members Posts: 503 Joined: 26-May 19 From: England Member No.: 23,161 Region Association: England 
 |
My car is now registered over in the UK so I can enjoy it at long last, I took it out today for the first time other than the short drive to the MOT centre last month
It drove OK to a point but I noticed it was very slow to respond once in 4th gear, it felt very flat and not at all keen to pick up speed If I shifted from 3rd to 4th at around 30mph / 3500rpm it was sluggish and a just over 30mph in 4th it felt like it was in the wrong gear and needed to down shift back to 3rd on the hills it soon ran out of grunt and I was having to down shift from 4th to 3rd and even 2nd to get it to rev again and build speed Setting off on a hill I had to really increase revs in 1st before shifting into 2nd otherwise it would bog down and feel like it was stalling thoughts: fuel? timing? other? thank you David |
   |
 
|
  |
Replies
| Tdskip |
Oct 5 2020, 08:59 AM
Post
#2
|
|
Advanced Member Group: Members Posts: 3,736 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None
|
You need to be very careful about not changing multiple things at the same time, but one easy test to rule out vacuum leaks given the condition of those gaskets is to carefully spray carb cleaner or starting fluid at the base of the carburetors while the car is idling.
That is probably the easiest test to do, perhaps do that before changing anything else. I will bet a pint on it being electrical but a bad vacuum leak could present similar issues |
|
|
|
Posts in this topic
dt4 1975 1.8 on twin carbs running poorly Oct 4 2020, 09:24 AM
Bleyseng So many possibilities but, lube the dizzy advance ... Oct 4 2020, 09:58 AM
dt4
So many possibilities but, lube the dizzy advance... Oct 4 2020, 10:45 AM Ansbacher Are the carbs jetted correctly? Possibly your mai... Oct 4 2020, 10:41 AM dt4
Are the carbs jetted correctly? Possibly your ma... Oct 4 2020, 10:43 AM Tdskip I know it drove OK for Dylan when it was here, but... Oct 4 2020, 10:46 AM rhodyguy IDF carbs? Size? The interior of that distr is pre... Oct 4 2020, 04:10 PM dt4
IDF carbs? Size? The interior of that distr is pr... Oct 5 2020, 12:29 AM dt4 ps
No idea on the carb type / size etc...
I'll... Oct 5 2020, 12:30 AM Tdskip Carbs will have a stamping, which can be hard to s... Oct 5 2020, 06:14 AM dt4 Pictures on the carbs Oct 5 2020, 08:15 AM rhodyguy That helps. Judging by that intake to carb gasket,... Oct 5 2020, 08:44 AM dt4
That helps. Judging by that intake to carb gasket... Oct 6 2020, 09:49 AM 914Toy
[quote name='rhodyguy' post='2856780' date='Oct 5... Oct 6 2020, 04:32 PM dt4
[quote name='rhodyguy' post='2856780' date='Oct ... Oct 7 2020, 12:37 AM ndfrigi
[quote name='914Toy' post='2857114' date='Oct 6 2... Oct 7 2020, 02:10 AM rhodyguy NOT ether. Spraying them down will compound the me... Oct 5 2020, 09:17 AM Tdskip
NOT ether. Spraying them down will compound the m... Oct 5 2020, 09:20 AM Rob-O
IDF carbs? Size? The interior of that distr is p... Oct 5 2020, 10:58 AM dt4 thanks for the input and suggestions chaps, I... Oct 5 2020, 01:29 PM porschetub
thanks for the input and suggestions chaps, I... Oct 5 2020, 03:53 PM ejm
If I shifted from 3rd to 4th at around 30mph / 35... Oct 5 2020, 04:43 PM Gint Sounds retarded (timing) to me. That's easy t... Oct 6 2020, 04:11 PM porschetub
Sounds retarded (timing) to me. That's easy ... Oct 6 2020, 09:36 PM Gint No, that's right if I'm not mistaken. 143... Oct 6 2020, 04:34 PM 914Toy
No, that's right if I'm not mistaken. 14... Oct 6 2020, 07:22 PM Gint I didn't catch that it was electronic. I have... Oct 6 2020, 10:05 PM dt4 I haven't disturbed anything since the car arr... Oct 7 2020, 05:57 AM Gint Your firing order is correct based on the picture ... Oct 7 2020, 06:32 AM dt4
Your firing order is correct based on the picture... Oct 7 2020, 06:54 AM Gint I corrected by statement about #1 position in my l... Oct 7 2020, 07:11 AM ndfrigi Have you tried cleaning your dizzy like what other... Oct 7 2020, 07:16 AM dt4 thanks @Gint and [b]@[url=http://www.914world.c... Oct 7 2020, 07:41 AM rhodyguy What does the inside of the distr cap look like? T... Oct 7 2020, 08:03 AM dt4
What does the inside of the distr cap look like? ... Oct 7 2020, 10:58 AM ndfrigi
What does the inside of the distr cap look like?... Oct 7 2020, 11:36 AM ndfrigi check this video also so It can help you if you wi... Oct 7 2020, 02:55 PM dt4 As the weather has been reasonable (dry) this week... Oct 11 2020, 07:10 AM Gint Carbs without a choke are always going to be a lit... Oct 11 2020, 07:52 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2025 - 07:36 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.