 Stalls out at 4400 RPM, Stumped! |
|
|
|
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. |
|
|
| Mblizzard |
 Feb 23 2014, 08:09 PM
Post
#1
|
|
Advanced Member  Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States  |
Well I am a bit confused on this one. 2056 dual Webers. Electronic ignition. New SVDA dizzy. Rev limiting rotor.
Pulled the tank to install SS lines and had a few problems with crimping the lines when putting the tank back but I think I have that worked out. Compression good at 130 plus on all. Timing set at 30 BTDC. Car runs strong up to exactly 4400 rpm and then it sounds like it hits a wall. Can run it long and hard at rpms below so I am not thinking it is fuel limited. Swapped out the rev limiting rotor with standard one but same thing happens. I am going to pull the tank again to be sure on the lines. Any other thoughts? |
   |
 
|
  |
Replies
| Jake Raby |
Feb 24 2014, 08:18 PM
Post
#2
|
|
Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Yep, a sheet metal screw was eaten. You'll make that mistake once.
|
|
|
|
| Mblizzard |
Feb 24 2014, 08:36 PM
Post
#3
|
|
Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
QUOTE(Jake Raby @ Feb 24 2014, 06:18 PM)  Yep, a sheet metal screw was eaten. You'll make that mistake once. Yes I will never do it again. I was very lucky! You remember the painful lessons! |
|
|
|
| wndsrfr |
Feb 25 2014, 08:33 AM
Post
#4
|
|
Senior Member Group: Members Posts: 1,455 Joined: 30-April 09 From: Rescue, Virginia Member No.: 10,318 Region Association: MidAtlantic Region 
|
To separate fuel from spark issues here's a neat easy way to do it.
Rev it with no load, sitting still in neutral. If it quits at 4400, it is ignition related since very little fuel flow is needed. If it is quitting due to fuel restriction, it'll happen at even lower rpm if you power brake it and go wot in third gear, say. (IMG:style_emoticons/default/popcorn[1].gif) |
|
|
|
Posts in this topic
Mblizzard Stalls out at 4400 RPM Feb 23 2014, 08:09 PM
r_towle Do you have an AFM?
Did it do it before you change... Feb 23 2014, 08:37 PM Jake Raby Sounds like you constricted something with the lin... Feb 23 2014, 11:21 PM Mblizzard Had not thought about a line swap Jake.
Did not ... Feb 24 2014, 05:58 AM stugray
Change back to the non-limiting rotor.... Feb 24 2014, 08:25 AM Mike Bellis I once had a fuel filter with an aluminum burr bal... Feb 24 2014, 09:16 AM rhodyguy Mike, are you using the cb style pump with the met... Feb 24 2014, 10:57 AM
Mblizzard
Mike, are you using the cb style pump with the me... Feb 24 2014, 01:04 PM aircooledtechguy I would pull that new SVDA dizzy out and throw it ... Feb 24 2014, 11:16 AM Mblizzard
I would pull that new SVDA dizzy out and throw it... Feb 24 2014, 01:33 PM r_towle
I would pull that new SVDA dizzy out and throw i... Feb 24 2014, 02:39 PM Eric_Shea
:agree: Feb 24 2014, 03:10 PM r_towle it "should" work either way...but the re... Feb 24 2014, 04:02 PM Racer Chris
I believe the return line is the one closest to t... Feb 24 2014, 04:15 PM r_towle
I believe the return line is the one closest to ... Feb 24 2014, 05:05 PM wndsnd If you are running electronic cd ignition like the... Feb 24 2014, 05:19 PM Mblizzard
If you are running electronic cd ignition like th... Feb 24 2014, 05:25 PM wndsnd :popcorn: Feb 24 2014, 05:32 PM rhodyguy Do you still have your old 009? Feb 24 2014, 06:46 PM Mblizzard
Do you still have your old 009?
I think the 1.8... Feb 24 2014, 06:57 PM r_towle You never said if this was happening before you ch... Feb 24 2014, 07:28 PM Mblizzard
You never said if this was happening before you c... Feb 24 2014, 07:41 PM Jake Raby Nate is spot on, too.. Trace your footsteps back. ... Feb 24 2014, 07:35 PM Jake Raby
Yep, a sheet metal screw was eaten. You'll m... Feb 24 2014, 10:15 PM r_towle Just so many things to go back through and verify ... Feb 24 2014, 08:30 PM Mblizzard
Just so many things to go back through and verify... Feb 24 2014, 08:48 PM r_towle Well it's fuel, air or timing.
Narrow your sea... Feb 24 2014, 08:53 PM ThePaintedMan Mike,
After you have gone back through the basi... Feb 25 2014, 08:17 AM type47 It wouldn't be his 30 degree timing spec would... Feb 25 2014, 04:17 PM Mblizzard
It wouldn't be his 30 degree timing spec woul... Feb 25 2014, 05:46 PM zambezi have you verified float levels? Feb 25 2014, 05:54 PM Mblizzard
have you verified float levels?
I had the set a... Feb 25 2014, 07:20 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 19th July 2025 - 08:12 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.