I have a 1996 Nissan Cefiro A32 and it wont start. It has a v6 engine. I have changed all the Serviceables like the spark plugs, filters, and also checked fuses. Could the Ecu be a problem. The engine does turnover but does not start. The car was running a day earlier and then it wont start.
Anonymous
Favorite Answer
what about a crank position censor
kathleen
Please don't remove the battery cable when the engine is running. That test was used in the 1960s and early 1970s, back when there were no electronics to destroy if the alternator had bad diodes. Now it can do thousands of dollars damage in an instant if the alternator has bad diodes. It is also an ineffective test - it won't tell you if the diodes are bad (except by the destruction of the various computers and control modules in the vehicle) and won't tell you if the alternator is overcharging, which it appears yours is. It's time to have a professional mechanic look at it. It sounds like the alternator voltage regulator is bad but that doesn't explain why the engine won't start.
Allan C
You need to find out what your missing (spark or fuel pressure). You'll have a better idea of where to start looking after you have determined which one of these are missing. I would go to the local auto parts store and purchase a repair manual ( Haynes or Mitchell are good). They will walk you through a step by step diagnostic sequence to help you narrow down your options. GOOD LUCK!!!
Mr. KnowItAll
"Won't start" is pretty vague. It could be hundreds of posibilities.
Dead battery, Low battery, bad ground wire to engine, bad power wire to starter, bad power wire to battery, bad connection at battery post or terminals, blown fuse, bad key switch, bad starter, bad fuel pump, bad injectors, out of gas, neutral safety switch, seized engine, broken connecting rod, no compression, no spark, bad oil pressure switch, broken timing belt, plugged fuel filter, bad starter solenoid, broken rotor, cracked distributor cap, Anti-theft device, water in/on engine, vacuum leak, bad ignition coil, blown computer, faulty cam or crank sensor ...
When you turn the key to START it what happens?
1) Nothing happens? (dead battery?, loose battery cables, or it's not in "park" all the way.)
2) You hear a "click", but nothing else? (loose battery cables, bad starter, bad starter solenoid, or broken engine)
3) You hear the starter turning, but the engine doesn't turn? (low battery voltage, bad starter or bad ring gear on flywheel/flex plate)
4) The starter turns the engine, but the engine won't start up? (out of gas, bad fuel pump, plugged fuel filter, broken timing belt, no spark)
5) The engine turns over, but very slowly. (weak battery, worn starter, out of engine oil)
6) the engine turns, but there's an awful banging noise? (something is broken inside the engine)
Ironball
The timing belt might have slipped or broke.