 Still sputter on decel, AAAGGHHHHHH!!!!! |
|
|
|
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. |
|
|
| Nemo914 |
 Sep 24 2003, 03:19 PM
Post
#1
|
|
Member  Group: Members Posts: 76 Joined: 11-July 03 From: Cape Cod, MA Member No.: 902  |
OK, I have posted before on help with a sputter (or light "backfire") on deceleration with my 1972 1.7. It happens at around 2-3k RPM and is worse when loaded on decel. Sounds like "phfft, phfft, phfft".
Most of you suspected an exhaust leak, and in agreement, I replaced the heat exchangers with SS, with new copper seals and the works. The stock muffler is also new. It all seems solid as a rock, and I don't think it could still be leaking. In George Hussey's "tech tips" (I know, everyone's favorite dude) it says, "If your 914 "pops" or backfires when suddenly backing off the throttle, suspect..." 1. Leaking muffler or heat exchanger to head connection 2. Fuel pressure too high 3. Throttle switch bad But, I have had it tuned by a reputable shop, fuel pressure checked, and installed a new throttle switch. Even tried different octane gas. It is a completely stock FI 1.7. It starts, idles and runs perfectly, except for this!! It is embarassing to drive as people admire the car and then laugh as it sputters and coughs on decel (IMG:style_emoticons/default/headbang.gif) Does anyone have any other ideas?? I have driven this car since I was 16 (21 years to date) and it never did this until about a year ago. Any help would be appreciated. Here are a few phots just because we all like pictures: Attached image(s) 
|
   |
 
|
  |
Replies
| joea9146 |
Sep 26 2003, 11:48 AM
Post
#2
|
|
Senior Member Group: Members Posts: 663 Joined: 10-February 03 From: Denver, NC Member No.: 283 Region Association: None |
Have u tried to search for an exhaust leak recently.... Put the car up on Ramps...
make sure it is well secured. Start it up when it is cold get a piece of vaccum hose about 3 feet long.... hold one end to your ear get under the car now search all the joints and connections for an exhuast leak. |
|
|
|
Posts in this topic
Nemo914 Still sputter on decel Sep 24 2003, 03:19 PM
Nemo914 Another: Sep 24 2003, 03:20 PM ArtechnikA is that the model that's supposed to have the ... Sep 24 2003, 03:36 PM robby750 I have no idea what the problem might be, but tha... Sep 24 2003, 04:04 PM Brad Roberts This is the decel valve. It could possibly be bad ... Sep 25 2003, 01:56 AM Nemo914 OK, will ops check the decel valve.
Also, can t... Sep 25 2003, 05:30 PM fiid Not much can be done about the ECU - it's prob... Sep 25 2003, 05:47 PM Bleyseng Hey, I was gonna suggest the Optima battery!
C... Sep 25 2003, 06:39 PM Bleyseng These crack.... Sep 25 2003, 06:48 PM Nemo914 Good idea on the leak. I am pretty sure I put eve... Sep 26 2003, 01:46 PM Brad Roberts I coat the backside of the copper gasket and I fil... Sep 26 2003, 02:05 PM
Nemo914 Where is the best place to get them new and how mu... Sep 27 2003, 06:53 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 10th June 2024 - 07:38 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.