 Injector flow test FAIL ?, Troubleshooting lean condition |
|
|
|
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. |
|
|
| jim-c |
 Jan 9 2022, 07:32 PM
Post
#1
|
|
Newbie  Group: Members Posts: 20 Joined: 21-November 21 From: Fort Lauderdale Member No.: 26,090 Region Association: South East States  |
Im working on my recent 914 purchase. 2.0L engine. D-Jet ECU . Intially the engine would fire right up and idle smooth at 1000 rpm. Unfortunately it didn’t want to rev above idle. I could quick pump the throttle and get it to rev but it was undrivable.
I have an AFR gauge and it shows dead lean when i try to rev. I did a flow test on two injectors ( all 4 are new ) . I have 28lbs of FP . Full throttle and crank for 15 seconds yields 2cc per injector. Supposed to be 7 ish. Any ideas ? Nice new harness, MPS holds vacuum and has correct impedance readings. The balance of sensors check out okay with test procedure. Fuel pump holds 28 lbs steady and pumped a quart of gas within 30 seconds . |
   |
 
|
  |
Replies
| JeffBowlsby |
Jan 9 2022, 09:37 PM
Post
#2
|
|
914 Wiring Harnesses & Beekeeper Group: Members Posts: 8,907 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
|
Do you mean resistance, or inductance? Has the MPS been previously opened or adjusted?
|
|
|
|
| jim-c |
Jan 9 2022, 09:52 PM
Post
#3
|
|
Newbie Group: Members Posts: 20 Joined: 21-November 21 From: Fort Lauderdale Member No.: 26,090 Region Association: South East States |
QUOTE(JeffBowlsby @ Jan 9 2022, 10:37 PM)  Do you mean resistance, or inductance? Has the MPS been previously opened or adjusted? I used an ohm meter so resistance I guess . The MPS was factory sealed . Nice and shinny . I removed the cap screw yesterday. I marked both screw locations. I turned the inner screw and it affected the ARF but the engine still won’t rev up . I have a new 123 dist. Installed . The MPS held vacuum . |
|
|
|
Posts in this topic
jim-c Injector flow test FAIL ? Jan 9 2022, 07:32 PM
JeffBowlsby Too many variables here now. An adjusted MPS, new... Jan 9 2022, 11:45 PM emerygt350 Since you have a 123 and the MPS really can be out... Jan 10 2022, 05:56 AM
jim-c
Since you have a 123 and the MPS really can be ou... Jan 10 2022, 10:51 AM rjames
Since you have a 123 and the MPS really can be o... Jan 10 2022, 11:39 AM jim-c Thanks for the replies.
I flow tested all 4 inje... Jan 10 2022, 09:21 AM emerygt350 It's a super easy rebuild. I think I got mine... Jan 10 2022, 12:00 PM emerygt350
It's a super easy rebuild. I think I got min... Jan 10 2022, 12:03 PM JeffBowlsby I am struggling to understand the low fuel flow an... Jan 10 2022, 12:07 PM jim-c
I am struggling to understand the low fuel flow a... Jan 10 2022, 12:36 PM rhodyguy The fuel sock lives in the bottom of the tank. If ... Jan 10 2022, 12:45 PM rjames
The fuel sock lives in the bottom of the tank. If... Jan 10 2022, 12:54 PM jim-c
The fuel sock lives in the bottom of the tank. If... Jan 11 2022, 10:55 AM 914Mels
Im working on my recent 914 purchase. 2.0L engine... Jan 10 2022, 01:31 PM jim-c Is the manifold pressure sensor hose clear? Are yo... Jan 11 2022, 10:57 AM jim-c Progress update .
Tank sock filter was vertical. ... Jan 14 2022, 11:42 AM emerygt350
Progress update .
Tank sock filter was vertical.... Jan 14 2022, 01:35 PM 914sgofast2 Low idle vacuum is likely a timing problem or undi... Jan 14 2022, 08:03 PM emerygt350
Low idle vacuum is likely a timing problem or und... Jan 14 2022, 08:42 PM jim-c Here’s an update /solution for my problem. I pul... Jan 16 2022, 05:54 PM StarBear
Here’s an update /solution for my problem. I pu... Jan 16 2022, 06:01 PM emerygt350 That is great. Post the link for the tester! Jan 16 2022, 06:22 PM |
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 11th May 2025 - 09:21 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.