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Showing results for tags 'hard starting'.
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1977 280z w/ MSII, rough idle, sneezes, and wont accelerate
ZDrummerGuy posted a topic in Electrical
Hello, my baby is having trouble idling and accelerating. I just recently installed MS2 in her so I could surpass the issues I was having with the electrics. However, the problems I was having before are almost the same as the problems now. A very rough idle and no acceleration in the rpm. I have replaced the coil, distributor, plugs, plug wires, fuel filter, ECU (to MS2), and the fuel regulator. I hooked the distributor up to my laptop and the board and spun it around with a drill and got rpm on the screen, so I think that works. The coil is working too because cranking it over unhooked give plenty of spark. I did a check on the fuel pressure after the fuel filter and got 37psi with the ignition on (the pump wont shut off when the car is on on, not start.. Maybe some feedback with this too please? I know it needs to be linked to the MSII board) while cranking it over I received 34-35psi so I ruled fuel pressure out... I know the plugs get spark because after the initial cranking the car will run for 30 seconds perfectly (from the CSV) then start to idle rough then die. That is, IF the car starts. Sometimes it just cranks over and doesn't start.. instead what happens is a big sneeze and puff of white smoke pours from the intake, along with some oil from the PCV system. Another thing that isn't up to shape is the tach, which doesn't work anymore... which I think should be hooked up to the negative side of the coil but has decided that it doesn't like the new coil or the new EFI system... I have many issues... Maybe an enthusiast who knows their way around these systems can lend a helpful hand! Thanks!- 5 replies
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- 280z
- hard starting
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I've got a strange one. My 73 is pretty stock. It does have an aftermarket crane ignition, but I can't see how this would cause the following problem. When it hasn't been started for a few hours, and the engine is cooled to the ambient 90 degree air temp, the first two or so times you turn the key, the starter behaves as if it isn't getting enough power. It sounds like the battery is almost dead, and simply cranks slowly. On the third try, the starter cranks normally, and the engine starts fine. If the engine is hot, this problem won't happen. I've read up on cleaning the electrical connections between the battery and the starter, done that, no change. I'd really hate to buy a new starter and still have this problem, but that seems to be the next thing to try. Any thoughts?
- 5 replies
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- hard starting
- slow cranking
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