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Rough idle to... will not stay started
I was driving home when she started to sputter, then when I pressed the gas it dropped and I was hard pressed to get 15 mph out of her. I finally got to a safe place where I could stop. I let her rest a bit and I was able to re-start. She was fine again for a little bit, when the symptoms came back. I was barely able to get her home. Now she will not stay started. She turns over and acts normal for a second and then shuts off.
My first thought was the fuel relay DME. Got a new one and replaced, no change. Next I pulled the fuel filter and found it was the original dated 4/14/1989. I've decided to go ahead and replace the pump as well while I have everything apart. Any other suggestions? What else should I go ahead and change while I'm at it? Thanks in advance, Chris
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Chris from NC ------------------- 86 944 covid19 Project 90 944 S2 Cab - triple black 66 mustang |
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08-27-2016, 01:47 AM
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might want to check the vac lines, and maybe the injectors for being gunked up.
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08-27-2016, 04:00 AM
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944 addict
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Also verify the connectors on the TPS and AFM are connected and check for tach bounce. More often than not, the DME relay causes weird problems like this as well. I'd buy another one but avoid the URO brand, they're junk and in may cases are bad right out of the box.
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3 944's, 2 Boxsters and one Caman S, and now one 951 turbo. Really miss the Cayman. Some people try to turn back their "odometers." Not me. I want people to know 'why' I look this way. I've traveled a long way and some of the roads weren't paved. |
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08-27-2016, 05:08 AM
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Sounds like a vacuum leak for sure. Check the vacuum lines as mentioned above but also the J-Boot from the AFM to the Throttle Body. Check underneath as the top may look fine and the bottom will be shredded in the bellows area.
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87 944N/A since 1992 87 944S - Near Future Engine Project Car 88 944S - Current Project 84 928S - Restoration Project Last edited by dgcantrell; 08-27-2016 at 02:07 PM.. |
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08-27-2016, 05:14 AM
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thanks guys.. I will check those things as well.
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Chris from NC ------------------- 86 944 covid19 Project 90 944 S2 Cab - triple black 66 mustang |
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08-27-2016, 06:36 AM
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The AFM and TB and J-Boot were all cleaned and inspected, no issues there.
I'm thinking of just replacing the vac lines with silicone ones... I have two DME's (not URO), so not the issue there.
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Chris from NC ------------------- 86 944 covid19 Project 90 944 S2 Cab - triple black 66 mustang |
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08-30-2016, 06:41 AM
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Well, Monday I completed the install of the new fuel pump and she can back to life. I then went ahead and changed to new silicone vacuum lines. I also added a new solid state DME relay.
She runs and sounds better than ever. Hopefully no more fuel issues! Thanks for all the help and suggestions!
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Chris from NC ------------------- 86 944 covid19 Project 90 944 S2 Cab - triple black 66 mustang |
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09-06-2016, 05:02 AM
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congrats man glad you got it started!
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09-06-2016, 12:34 PM
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COVID19 Project
1985 Porsche 944
1987 Porsche 951
Porsche 944 NA
1986 Porsche 951
The Red Car
New Project
The Panzer
The Red Audi
