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tabs914 |
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#1
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Advertise Your Drive... ![]() ![]() Group: Members Posts: 105 Joined: 17-January 05 From: Gresham, Oregon Member No.: 3,456 Region Association: None ![]() |
Hello all... I have been trying to trouble shoot my non-starting 914(just cranks). I figured I would start on the fuel injection system, making sure the ECU is getting the proper signals. Here is what I have checked:
MPS Vacuum: Holds 5 Min. + Main Coil: 56 ohms SPEC: 90 Secondary Coil: 348 ohms SPEC: 350 Injectors: SPEC 3 ohms for all injectors Inj 1: 3 ohms Inj 2: 3 ohms Inj 3: 2 ohms Inj 4: 2 ohms Throttle Position Switch Idle Contact: Spec .5 ohms .68 ohms Head Temp Sensor: SPEC 2k ohms Also it is new... 3k ohms I cleaned the trigger points (I don't know if it was a fluke, but this sparked a stummble for one second, only once) New cap/rotor/points Checked Spark from coil wire (Good) Checked Spark from cap (good) Checked Spark at plug (good) Fuel Pump Primes when key is turned Checked the injectors for pulse (when cranking) Good. New fuel filter and lines (the pump is installed correctly I have checked several times (IMG:style_emoticons/default/smile.gif) The AAR warms up if connected to 12 volt. warm closes and opens when cooled down. (not sure if it should do this if I just turn the ignition on? - doesnt seem to warm up if I do.) New vacuum lines backed up with clamps on all connections I can't check fuel pressure - I don't have a guage nor for compression either. Anyone in Portland, Oregon or Vancouver, Washington I can borrow from? (IMG:style_emoticons/default/smile.gif) Maybe someone in the area that can help me out, would be very cool. I am learning alot, but this has me stumped. I haven't had her on the road yet, but I had this baby running pretty well. I was messing around with the head temp sensor when it died. I thought maybe the wire lead became damaged within the sensor casing? Bought a new sensor with no effect. I have three ECU's and I know two work (no effect) The triggers seemed to sparked a stumble, they look ok... any way to test them? Thank you for your help. (IMG:style_emoticons/default/biggrin.gif) Tab |
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tabs914 |
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#2
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Advertise Your Drive... ![]() ![]() Group: Members Posts: 105 Joined: 17-January 05 From: Gresham, Oregon Member No.: 3,456 Region Association: None ![]() |
Thank you all for your suggestions... I really appreciate it. (IMG:style_emoticons/default/biggrin.gif) Well going to the store and buying some more testing equipment has narrowed my search for the culprit...
I tested the compression. I could only do this on a cold motor of course, but here are the results: 1: 145 2: 148 3: 148 4: 145 ...looks like fuel. I hooked the fuel pressure gauge to the test port... turned the key and heard the pump prime then continued to crank the motor for 8 seconds or so... zero on the gauge. Second attempt same thing. I pulled the gauge and it was dry. It doesn't look like there is a valve on the port so it appears that there is a supply issue... and yes I have a 1/4 tank of fuel. (IMG:style_emoticons/default/lol-2.gif) more things I can try? |
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