dagold Posted August 7, 2010 Share Posted August 7, 2010 Ok I need some help as I am losing hair quickly on this basically stock 77. I may leave something out, as I have done allot, but will try to include as much detail as possible. Car was running fine 8 hours earlier, came out starts just fine until I touch the gas and it stalled out. since then I have done the following. 1. Checked timing 2. Checked vacuum 3. Tested TPS (found dirty connectors but are now clean and reporting correct per FSM page ef-22 4. Easy from zcar suggested the AFM finger test and found that if I controll the weight from AFM car runs also is I slowly and throttle car will rev all the way up 5. Fuel pressure test is good 6. Working through stalling steps on FSM page ef-21 only thing I really found odd is at pin one only showing 8.1 volts I am not sure what else to do at this point. Going to get a coil in the morning to see. Quote Link to comment Share on other sites More sharing options...
JSM Posted August 17, 2010 Share Posted August 17, 2010 Fuel pressure is a consitant 36 PSI? I installed a permenant gauge in my 78 fuel line after the fuel filter. Mine did the same thing as your describing. I still haven't got it fixed yet but I know that is one problem. Also check the plug for the tempature sensor. The 78 has the two prong. Not sure what the 77 is. Mine was bad as well. I would work through the harness test outlined in the FSM. It is very easy and informative. So this is a cold start symptom only or just when you first start it? How is it once warmed up? Quote Link to comment Share on other sites More sharing options...
sticky280zx Posted August 17, 2010 Share Posted August 17, 2010 you check the chts (cylinder head temp sensor) on the thermo, they are notorious to going stupid and making us pull out our hair Quote Link to comment Share on other sites More sharing options...
JayBee280 Posted September 7, 2010 Share Posted September 7, 2010 Ok I need some help as I am losing hair quickly on this basically stock 77. I may leave something out, as I have done allot, but will try to include as much detail as possible. Car was running fine 8 hours earlier, came out starts just fine until I touch the gas and it stalled out. since then I have done the following. 1. Checked timing 2. Checked vacuum 3. Tested TPS (found dirty connectors but are now clean and reporting correct per FSM page ef-22 4. Easy from zcar suggested the AFM finger test and found that if I controll the weight from AFM car runs also is I slowly and throttle car will rev all the way up 5. Fuel pressure test is good 6. Working through stalling steps on FSM page ef-21 only thing I really found odd is at pin one only showing 8.1 volts I am not sure what else to do at this point. Going to get a coil in the morning to see. The coil in 280's were not 12v they only work from 6-8v through the stock ecu. Get some Mass air flow sesor cleaner from your autoparts store. Spray the inside of the maf, let dry for 2-3 min start it see how it runs Quote Link to comment Share on other sites More sharing options...
sticky280zx Posted September 7, 2010 Share Posted September 7, 2010 there is no MAF in our cars, just the AFM....not untill the 300zx did z's get a Mass Air Flow they only had Air Flow Meters Quote Link to comment Share on other sites More sharing options...
JSM Posted September 8, 2010 Share Posted September 8, 2010 Check #2 That is what sends the signal to the ECU. Quote Link to comment Share on other sites More sharing options...
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