Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

> Ideas please......, '74 2.0 running/starting issue
theman352001
post May 25 2006, 07:59 PM
Post #1


Newbie
*

Group: Members
Posts: 16
Joined: 21-March 06
From: Wisconsin
Member No.: 5,750



Hey guys & gals, sorry for the length, would like to be thorough.

Past Status: '74 2.0 was running great 2 years ago. Took it to a gas station to fill up a gas can (no gas was put into the car's tank) and as I was leaving the car died. I tried to start it a couple of times and was able to get it to run but as soon as I would try to give it some gas (not in gear) the car would die. The only thing I noticed differently was that the fuel pump didn't sound right.

Back then I tested the fuel pump for flow and pressure (without car running) and both seemed good. The car would start periodically and idle fine but I could not touch the accelerator without it dying. The pump still didn't sound right however.

Current status: Pulled the '74 pump and rigged up a '75 pump that tested good for flow. '74 pump seems a bit weak on flow. Car will not start at all. I am not even getting any firing.

Plugs are working fine with nice fat sparks. Also, the 2 driver's side injectors are firing a good spray of fuel. (I did not check the passenger side - assuming they are fine)

Next on my list of things to check:
  • Make sure timing hasn't somehow jumped position
  • double check Crane HI-6 ignition system
  • temperature sensor
I am interested in any other thoughts or past experiences from the group. What else should I be checking? Have you had a similar problem and what was the solution?

Thanks in advance.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
Reply to this topicStart new topic
Replies
theman352001
post May 30 2006, 08:11 AM
Post #2


Newbie
*

Group: Members
Posts: 16
Joined: 21-March 06
From: Wisconsin
Member No.: 5,750



Ok guys, here is what I found out......

1: I tried to start the car right off the bat and it did fire and try to run. I had it running on it's own but as soon as I applied the gas she died. I did not get it started again after that.

2: Dbl checked timing and it was on.

3: Checked fuel pressure w/ the new pump and it was about 33 PSI so I adjusted it back down to between 28 and 29 PSI.

4: Checked the MPS. I got good values on the two coils 91.9 and 349.8 ohms with no indication that they are touching each other or the MPS housing. I sucked on the hose and it held vacuum.

5: Checked the Intake Air Temperature Sensor and it was in spec.

OK, here are the areas I checked that didn't "check" out.......

6: Checked the Thermo switch that operates the cold start valve and got an open circuit from the lead to any ground point.

7: Checked the Cylinder Head Temperature Sensor and received a value of 5.1 ohms from the lead to any ground point. This value is about double what I have seen it should be.

8: Noticed that I had standing fuel in the intake manifold. Checked the cold start valve and it was not firing or leaking. I decided to disconnect it anyway since I don't run the car in the cold. (both fuel and electrical)

My thoughts at this time......

I think I am experiencing a rich running condition and the car is flooding out. This is supported by the Cylinder Head Temerature Sensor value and the fuel in the intake.

I would like to hear what you guys think. Also, is there any other way for gas to get into the intake besides the cold start injector?

Thanks for your input.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 10th June 2024 - 05:09 AM