 Advice/ help please, engine noise |
|
|
|
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. |
|
|
| ILM914 |
 Dec 29 2022, 03:26 PM
Post
#21
|
|
Member  Group: Members Posts: 96 Joined: 3-March 09 From: NC Member No.: 10,126 Region Association: None  |
took my 74 914 out the other day on an errand, I have the orig Diet system on the car. all of the sudden while driving it sounded like an exhaust leak or flapping as the engine went. Also in between shifts and when I let off the gas the exhaust popped or had a small backfire. Small loss of power and a little rough running.
I'm going to do a compression or leak down on it but I wonder if any knowledgable folks know what this might be ? If it's a head gasket what's the best way to change it and should i do all the head gaskets for all the cylinders ? thank you, Joe |
   |
 
|
Posts in this topic
ILM914 Advice/ help please Dec 29 2022, 03:26 PM
Root_Werks Would hope just a cracked exhaust pipe close the h... Dec 29 2022, 03:31 PM Dlee6205 Blown muffler? Loose spark plug? Dec 29 2022, 04:37 PM emerygt350 Spark plug is a good suggestion. Dec 29 2022, 09:03 PM ILM914 thanks guys checked the plugs and exhaust is solid... Dec 30 2022, 12:54 PM brant also if it happens to be an air injection motor...... Dec 30 2022, 01:04 PM
SirAndy
also if it happens to be an air injection motor..... Dec 30 2022, 01:18 PM
ILM914
also if it happens to be an air injection motor..... Dec 31 2022, 01:05 PM brant Only on air injection motors
Mine are capped…. ... Dec 31 2022, 01:32 PM brant And a close up Dec 31 2022, 01:33 PM ILM914 thanks guys my motor doesn't have the air caps... Dec 31 2022, 05:50 PM emerygt350 Do they exist?
You need to start troubleshooting.... Dec 31 2022, 08:10 PM wonkipop
Do they exist?
You need to start troubleshooting... Dec 31 2022, 08:18 PM L-Jet914
[quote name='emerygt350' post='3048529' date='Dec... Dec 31 2022, 08:57 PM wonkipop
[quote name='emerygt350' post='3048529' date='De... Dec 31 2022, 09:24 PM rhodyguy Push a block of 2x4 against the exhaust pipe. A le... Jan 1 2023, 09:05 AM brant I’d guess exhaust also
Maybe a stripped stud?
P... Jan 1 2023, 09:17 AM emerygt350 With that loss of power it sounds like you lost a ... Jan 1 2023, 09:26 AM ILM914 Thanks Guys i still haven't found the problem,... Jan 3 2023, 12:53 PM emerygt350 Was that with all plugs out and throttle wide open... Jan 3 2023, 01:44 PM ILM914 Thanks guys Throttle was not wide open when did co... Jan 9 2023, 02:50 PM 930cabman
Thanks guys Throttle was not wide open when did c... Jan 10 2023, 01:27 PM emerygt350 Did you look at the plugs? Cracked/warped heads/b... Jan 9 2023, 03:21 PM ILM914 Thanks Plugs are a bit black with some carbon but ... Jan 10 2023, 01:17 PM JamesM
took my 74 914 out the other day on an errand, I ... Jan 10 2023, 10:23 PM emerygt350 Did one plug look different from the others?
And ... Jan 11 2023, 06:11 AM ILM914 Thanks Guys how do I stop the engine from turning ... Jan 11 2023, 11:59 AM 930cabman
Thanks Guys how do I stop the engine from turning... Jan 11 2023, 12:24 PM ILM914 Ok guys the motor is still in the car. I tried ag... Jan 16 2023, 04:58 PM emerygt350 Skip the leak down for a bit. Do a real compressi... Jan 16 2023, 08:11 PM ILM914 OK thank you will do, I'm hesitant to put a bl... Jan 16 2023, 10:42 PM rhodyguy You don’t block the exhaust indefinitely. Nor is... Jan 16 2023, 10:59 PM ILM914 ok thank you so I have a ansa exhaust that has 4 t... Jan 17 2023, 06:28 PM emerygt350 you can do bank to bank but what they wanted you t... Jan 19 2023, 10:40 AM ILM914 thanks guys I will do another compression test and... Jan 19 2023, 04:36 PM rhodyguy Skip the board. Gook luck. Jan 19 2023, 06:25 PM ILM914 Ok guys compression readings similar to the ones I... Jan 23 2023, 04:23 PM ILM914 I was unable to seal the exhaust at the tips while... Jan 23 2023, 04:25 PM emerygt350 That first cylinder is a hair low but if the plug ... Jan 23 2023, 05:44 PM ILM914 Ok folks so I pulled all the plug wires one at a t... Jan 30 2023, 10:39 PM r_towle Muffler leaking….be more aggressive holding a bo... Jan 30 2023, 10:52 PM emerygt350 These 4s will idle with a plug off no problem. Yo... Jan 31 2023, 10:24 AM rgalla9146 The car idles ?
Raise the idle to 2000 RPM and... Jan 31 2023, 07:02 PM  |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 27th May 2024 - 11:28 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.