 I'm stumped with a no start problem, Fuel injection strikes again |
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| brant |
 Aug 23 2004, 10:04 AM
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#1
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914 Wizard  Group: Members Posts: 12,005 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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Hi everyone,
sorry for basically posting the same problem I've been chasing for 3months... 1972 1.7 with Djet I've Done nearly everything... honestly.. tested and re-tested... This weekend I even changed the FI harness completely..... So I guess I'm going to start over from scratch and give it one more go around. The good news is that my problem has gotten worse and now its to the point of not starting, so it should be easier to find than when it was intermittent. The symptoms. when the car is cold (or sits for 30 minutes) it will start and then run for 30-60 seconds. During this running time it is smooth, hitting on all cylinders, and sounds good.... However, after 30 seconds it dies and will not restart until it has sat for 30 minutes. During the "dying" it shows spark at the timing light and Fuel Pressure on a guage... During its no start period, it continues to have spark at each plug wire, and continues to have 29.6psi of fuel pressure at the guage... So I've got to think its FI related. I swear, I've tested everything except for the cold start sensor, and TPS.... but I guess I had better start over... Is there something with this type of symptom I should check first? I thought FI points, but have tried 3 sets yesterday to no avail. I also ohm tested the 25 pins on the ECU and they were all fine. Is there something in the regulator board that would cause this problem, other than the power to the Fuel pump (since I have pressure still). thanks everyone. brant |
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| porschefool |
Aug 23 2004, 10:48 AM
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#2
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Member Group: Members Posts: 82 Joined: 1-May 04 From: Monroe, WA Member No.: 2,010 |
Don't rule out the relay board. Mine drove me crazy, thinking it was the FI system,. After going through everything twice, I was pushing on a relay when it started to die and that made it recover. (fuel pump was dying when relay got warm-but I thought it was getting too rich) Stripped/resoldered board, and away I went. Ran better, too, after checking/recalibrating stuff! (new CHT didn't hurt, I'm sure)
Hang in there... (IMG:style_emoticons/default/ar15.gif) Eric '72 D-Jet |
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Posts in this topic
brant I'm stumped with a no start problem Aug 23 2004, 10:04 AM
McMark Sounds like CHT. Or... does it start when cold an... Aug 23 2004, 10:22 AM Brad Roberts Throw another brain in it.. Dont subscribe to the ... Aug 23 2004, 10:26 AM Bleyseng Is it not starting because its a really rich fuel ... Aug 23 2004, 10:34 AM SpecialK :agree: with the CHT problem
A quote from Brad A... Aug 23 2004, 10:37 AM Brad Roberts He is correct. I run my hand under the relay board... Aug 23 2004, 10:53 AM Bleyseng The asumption is that the other parts/systems of t... Aug 23 2004, 10:54 AM brant I promised myself I wouldn't say..."already tr... Aug 23 2004, 11:24 AM brant Marc,
yep.. electrical to cold start injector ha... Aug 23 2004, 01:00 PM john rogers If it were me I'd put a pressure gauge on the ... Aug 23 2004, 03:49 PM brant John or anyone,
one thing I haven't tested y... Aug 23 2004, 04:13 PM Brad Roberts The car will start and run without the TPS hooked ... Aug 23 2004, 06:06 PM brant Brad,
first let me thank you for your time...
I... Aug 23 2004, 09:06 PM Brad Roberts I didnt know this car ran in the past.. so the fue... Aug 23 2004, 09:53 PM brant Brad,
Yeah.. I think I tested every single thing... Aug 24 2004, 02:45 PM
Brad Roberts OK.. I have seen 3 cars this year with trigger poi... Aug 24 2004, 02:50 PM |
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