 75 2.0 engine ran great yesterday, Today it doesn't. |
|
|
|
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. |
|
|
  |
| Stacks914 |
 Aug 21 2015, 01:22 AM
Post
#1
|
|
Member  Group: Members Posts: 183 Joined: 1-April 15 From: Omaha, ne Member No.: 18,582 Region Association: None  |
Anyway as title states my engine ran great yesterday. Today I spend all day re wiring a few wires on harness and fixing all the electricle bits I had rigged and got car in a suitable condition to drive. Well I get in start car and it runs briefly then dies. Then I restart and it sounds like it is running on one cylinder. I give it a little gas other cylinders do not seem to be firing so I let off gas and car dies. I turn on the starter and its turning fast and sounds like it has no compression. Engine will putter a bit like it wants to start but doesn't. Local engine guy worth a shit is 2 months out. Any ideas?
|
   |
 
|
| JawjaPorsche |
Aug 21 2015, 03:46 AM
Post
#2
|
|
Advanced Member Group: Members Posts: 3,463 Joined: 23-July 11 From: Clayton, Georgia Member No.: 13,351 Region Association: South East States |
Carbs or FI?
|
|
|
|
| Stacks914 |
Aug 21 2015, 04:30 AM
Post
#3
|
|
Member Group: Members Posts: 183 Joined: 1-April 15 From: Omaha, ne Member No.: 18,582 Region Association: None |
F.i.
|
|
|
|
| DavidSweden |
Aug 21 2015, 05:19 AM
Post
#4
|
|
Member Group: Members Posts: 479 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
QUOTE(Stacks914 @ Aug 20 2015, 11:22 PM)  Anyway as title states my engine ran great yesterday. Today I spend all day re wiring a few wires on harness and fixing all the electricle bits I had rigged and got car in a suitable condition to drive. Well I get in start car and it runs briefly then dies. Then I restart and it sounds like it is running on one cylinder. I give it a little gas other cylinders do not seem to be firing so I let off gas and car dies. I turn on the starter and its turning fast and sounds like it has no compression. Engine will putter a bit like it wants to start but doesn't. Local engine guy worth a shit is 2 months out. Any ideas? The same happened to me, ran ok then suddenly would not start. After wasting a lot of time, 2 weeks checking the FI I finally took members advice and did a compression then leakdown test. Discovered no compression on 2 cylinders which turned out to be dropped valve seats. This may not be your problem as you have been playing with the electrics but keep it in mind, a leak down test or compression test will rule out head problems. Good luck |
|
|
|
| JRust |
Aug 21 2015, 11:22 AM
Post
#5
|
|
914 Guru Group: Members Posts: 6,307 Joined: 10-January 03 From: Corvallis Oregon Member No.: 129 Region Association: Pacific Northwest 
|
You check all the simple stuff? All spark plug wires on? How is your cap & rotor. Had the cap pop loose once. Acted the same way. First check your cap & rotor. From there check each wire to see if it is getting spark. Next check your fuel to each injector.
I seriously doubt you dropped a couple valve seats in a day when it ran great yesterday. Without some real obvious noise pointing to that. Checking your compression is always a good idea to though. Go to harbor freight to buy a compression tester if you don't have one. While you won't use it a lot. Well worth the harbor freight price. Once you've ruled out things above. Report back & we'll go from there (IMG:style_emoticons/default/biggrin.gif) |
|
|
|
| Stacks914 |
Aug 21 2015, 12:28 PM
Post
#6
|
|
Member Group: Members Posts: 183 Joined: 1-April 15 From: Omaha, ne Member No.: 18,582 Region Association: None |
Got my marching orders !! Thanks guys I have a compression tester. After 6 weeks of messing with this engine I think I need to check myself into the psych ward. I am worried I am gonna wind up sitting in a padded room mumbling "air cooled, I just had to do it myself" over and over! (IMG:style_emoticons/default/screwy.gif) I'll check it out and report!!!!
|
|
|
|
| Dave_Darling |
Aug 21 2015, 02:14 PM
Post
#7
|
|
914 Idiot Group: Members Posts: 14,985 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
|
I bumped a connector in the engine bay one time without realizing it. Took a bunch of troubleshooting the no-start to figure out that the head temp sensor connector had gotten unplugged.
Check all your electrical connections. Are they actually connected? --DD |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 15th May 2024 - 12:17 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.