| View previous topic :: View next topic |
| Author |
Message |
brealytrent
Joined: 28 Dec 2008
Posts: 414
Location: Goldsboro, NC
|
 Posted: Thu Jul 23, 2009 10:46 am Post subject: I need your help again w/my 924!!! |
 |
|
Ok, so the problem is the car will not get any fuel. What I mean by this is it will start, but you cannot give it any gas as it just starts to cough and hack. We talked to the place that fixed the fuel distributor (Jaytan) and they told me it may be the pressure regulator valve. He said the valve will get stuck with small amounts of dirt. So we pulled it out, cleaned, lubed with some 3 in one oil (he recommended) and wallah, the car ran perfect. That is, until thirty miles later it had the same problem. This time we couldn't fix it. So we sent it back (the third time) and got it back today. Put it in, and it ran perfect again. So, we turned off the engine and began working on another project. Later in the day we decided to try and drive it but right from when we started it, it had that same problem. We've replaced the fuel pump, cleaned the fuel tank, new fuel filter and prefilter, etc.. We don't know where to turn any more. Help! This car has been sitting in my garage for two years waiting to run!
P.S. I am starting to believe this car is a Nazi, or is possesed by some evil. |
|
| Back to top |
|
 |
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Thu Jul 23, 2009 11:50 am Post subject: |
|
|
Get a proper CIS pressure tester and make sure that the WUR is functioning correctly. Check the system and control pressures per Haynes. The problem may not be with your fuel dizzy at all...
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
Joes924Racer
Joined: 03 Nov 2002
Posts: 11964
Location: Oregon, Denver Colorado native!
|
| Posted: Thu Jul 23, 2009 12:30 pm Post subject: |
|
|
Ok there 2 fuel pumps the iside the tank pump could be not running all the time as in a loose wire. You cleaned the tank replaced the pump
and the fuel filter had the fuel dizzy rebuilt hmmmm.. you need to check the fuel pressure at fifferent points in the sys. like before the dizzy after the dizzy and at the injectors. The injectors are supposed to deliver a certian amount of fuel in a certian amount of time.. also you can pull the injectors one at a time and with the key on the sys. engerized pull up on the flapper thing that sits in side where the air cleaner goes the air cleaner needs to be removed to do this what your looking for is the spray pattern of the injectors should be a big fan conical shaped spray.. and of course you might replace the wur.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo. |
|
| Back to top |
|
|
brealytrent
Joined: 28 Dec 2008
Posts: 414
Location: Goldsboro, NC
|
| Posted: Thu Jul 23, 2009 12:41 pm Post subject: |
|
|
The WUR is in NO way the problem with the system. For the brief amount of time it is used, I don't know how it could affect the system. What I mean is: it's kind of ironic how the car works after the fuel distributor is fixed, but then craps out again. Wouldn't it be a continuous problem. In addition, there is only one fuel pump in the vehicle. I can get a pressure tester, but I have no idea where to get the attachments as everything for this vehicle is hard (and expensive) to come by. It's a 1977 1/2 924 and it has the fuel system with two accumulators.
We adjusted the fuel mixture so now it revs, but the fuel pump will still make a bunch of noise. If you let the car continue to run for another twenty seconds or so you will hear the pump stop making noise and the car dies.
The only idea I have is there is some plug between the pump and the fuel filter. |
|
| Back to top |
|
|
brealytrent
Joined: 28 Dec 2008
Posts: 414
Location: Goldsboro, NC
|
| Posted: Thu Jul 23, 2009 12:43 pm Post subject: |
|
|
| Or the pump has crapped out from the problems earlier. |
|
| Back to top |
|
|
brealytrent
Joined: 28 Dec 2008
Posts: 414
Location: Goldsboro, NC
|
| Posted: Thu Jul 23, 2009 12:47 pm Post subject: |
|
|
| I also forgot: the injectors are new too. |
|
| Back to top |
|
|
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Thu Jul 23, 2009 7:59 pm Post subject: |
|
|
| brealytrent wrote: | | The WUR is in NO way the problem with the system. |
Well, my friend, there is NO way you can categorically state this unless you perform a proper CIS pressure test. In my experience, messing around with the fuel system can cause stuff to dislodge and the WUR is one of the most critical aspects of the system. If it gets bodged up and isn't providing correct fuel pressure when you step on the throttle the results could be exactly what you describe. At the very least, do the test and eliminate it as a variable. It is a likely suspect at this point until you eliminate it. Troubleshooting 101.
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
brealytrent
Joined: 28 Dec 2008
Posts: 414
Location: Goldsboro, NC
|
| Posted: Fri Jul 24, 2009 1:06 pm Post subject: |
|
|
| Quote: | | If it gets bodged up and isn't providing correct fuel pressure when you step on the throttle the results could be exactly what you describe. |
This isn't the problem anymore: I guess the mixture was messed up, but is now figured out so it revs fine, but the fuel pump still makes a bunch of noise and dies. Is it possible the problem is fixed but from all the previous problems the fuel pump is shot? |
|
| Back to top |
|
|
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Fri Jul 24, 2009 7:59 pm Post subject: |
|
|
Of course it's possible. But your never going to know unless you get the PROPER TOOLS and do a PROPER DIAGNOSIS.
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
D Hook
Joined: 02 Nov 2002
Posts: 3158
Location: Omaha, NE
|
| Posted: Fri Jul 24, 2009 10:57 pm Post subject: |
|
|
| brealytrent wrote: | The WUR is in NO way the problem with the system. For the brief amount of time it is used, I don't know how it could affect the system. What I mean is: it's kind of ironic how the car works after the fuel distributor is fixed, but then craps out again. Wouldn't it be a continuous problem. In addition, there is only one fuel pump in the vehicle. I can get a pressure tester, but I have no idea where to get the attachments as everything for this vehicle is hard (and expensive) to come by. It's a 1977 1/2 924 and it has the fuel system with two accumulators.
We adjusted the fuel mixture so now it revs, but the fuel pump will still make a bunch of noise. If you let the car continue to run for another twenty seconds or so you will hear the pump stop making noise and the car dies.
The only idea I have is there is some plug between the pump and the fuel filter. |
The JC Whitney model comes w/all the attachments.
Did you replace the pump before cleaning the tank or after?
_________________
'80 924 n/a SOLD |
|
| Back to top |
|
|
ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
|
| Posted: Fri Jul 24, 2009 11:43 pm Post subject: |
|
|
Speaking of JCWhitney, they're running a 4-day special, $10-$50 off on orders between $75-$250. Free shipping on anything over $75. Promo code: DEDBGY9
Now would be a great time to pick up that $60 pressure tester, and maybe a few other things for your tool box.
_________________
erstwhile owner of just about every 924 variant ever made |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
924 FAQ (Technical)
