 D-jet idle - one issue thats not been solved, low idle on start up for a few minutes hot or cold...... |
|
|
|
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. |
|
|
| DRPHIL914 |
 Apr 6 2021, 06:04 AM
Post
#1
|
|
Dr. Phil  Group: Members Posts: 5,756 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States 
 |
here is my set up, - its a '75 2.0 d-jet with very fresh and new in past 2 years everything,
,tested proper functioning AAr, CHT is the new 914rubberone, but same issue with my NOS one, no vac leaks , rebuilt throttle body MPS(ive tested 2 others one rebuilt by Jeff B same issue), etc etc , 123 distributor, anywayhere is what i have going on- i think i am around 1000 for a good steady idle, if its lower than that warmed up, then i cant get it to idle decent when cold for the first 2-3 minutes, even with AAr open, same with a hot start after running for a while, then shut off and turned back on after sitting foor a few minutes, heat sink on the CHT maybe, i have a feeling the resistance of the CHT is not correct, it is a NOS correct CHT but i am thinking about adding that resistor to the cht line- any thoughts? i have to feather or hold the pedal down just a bit for a minute or 2 then it comes up. like i said perfect idle around 950-1000 once on for a while or even stopped at light after running for a long time idle is perfect EXCEPT after turned off for a bit then back on-- Phil |
   |
 
|
  |
Replies
| BeatNavy |
Apr 6 2021, 07:23 AM
Post
#2
|
|
Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region
|
Going over 300 is not an issue especially with hard driving. I understand north of 350 regularly may be cause for attention. Pushing or exceeding 400 not good.
On my 2056 I was D-Jet. On my 2270 I'm Microsquirt with an idle air control valve. On both I have the Raby cam, and, as mentioned, first start of the day requires a few blips of the throttle. I think I've heard others say the same thing. I hadn't heard about PMB's FI solution. I need to check that out. |
|
|
|
| GregAmy |
Apr 6 2021, 07:31 AM
Post
#3
|
|
Advanced Member Group: Members Posts: 2,264 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States
|
|
|
|
|
Posts in this topic
DRPHIL914 D-jet idle - one issue thats not been solved Apr 6 2021, 06:04 AM
BeatNavy Phil, what are the specs on your engine? Is it bo... Apr 6 2021, 06:27 AM
DRPHIL914
Phil, what are the specs on your engine? Is it b... Apr 6 2021, 06:36 AM
DRPHIL914
Phil, what are the specs on your engine? Is it b... Apr 6 2021, 06:39 AM DRPHIL914
Here's my go-to info for CHTs:
http://www.91... Apr 6 2021, 08:28 AM ClayPerrine
On both I have the Raby cam, and, as mentioned, f... Apr 6 2021, 07:56 AM BeatNavy
On both I have the Raby cam, and, as mentioned, ... Apr 6 2021, 08:04 AM Olympic 914 My engine regularly gets head temps into the 300... Apr 6 2021, 12:00 PM ClayPerrine
BTW i believe you should not be using Synthetic 2... Apr 6 2021, 02:21 PM DRPHIL914
BTW i believe you should not be using Synthetic ... Apr 7 2021, 05:54 AM ClayPerrine
i may have misspoken about synthetic, i currentl... Apr 7 2021, 06:25 AM DRPHIL914
i may have misspoken about synthetic, i current... Apr 7 2021, 06:34 AM ClayPerrine
[quote name='ClayPerrine' post='2906212' date='Ap... Apr 7 2021, 06:50 AM wonkipop down here, climate maybe like texas, i'm using... Apr 7 2021, 10:20 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 18th April 2024 - 12:48 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.