need help injectors!! 2001 atima

[dcioffi999]

car wont start
checked for fuel by pulling off line from fuel rail ,there is fuel when I turn the key on.
changed distributor with rebuild one, still nothing .
the car will start for a second with starter fluid, still no injector pulse.
fuse's , grounds, and injectors ok. with 10 omhs of rest.
distributor has power
checked the 1 degree and 180 degree,
pulsating but not a 5 volts ?????????????
thanks

[Timothy S]

Have you checked the connections at the Mass Air Flow sensor near the Air filter? If you had the air intake hoses disconnected when using starting fluid, it might make the ecu think the car is not running. A bad vacum leak might do something a little less severe. On some older cars, unplugging the MAF sensor puts the car into limp mode, allowing it to run even with a bad MAF sensor.

[dcioffi999]

I still have no pluse to my injectors , I've changed distrubtors twice ,I have fuel pressure ,car will run on starter fluid. Auto mech. said maybe E.c.m or key problem (possible resistance)

[Timothy S]

[injectors-not-working-t405660.html/url]
Does this sound familliar? No injector pulse was solved by checking the CAS (Cam angle sensor) also known as a camshaft position sensor in the distributor. This was on a 240sx with a similar 4-cylinder engine to our altimas.

[dcioffi999]

I have changed the distributor twice thinking the first one I bought was also bad,they where both surposed to be rebuilt (I don't know how when you cant buy parts for it)

[dcioffi999]

o.k so now im on the hunt for a ecm but from what I hear I need one with the same part number as mine for it to be compatable,can anyone narrow this down as far as part number so I don't have to pull all the ecm's at the salvage yard looking for part numbers.would altimas from 1998 -2001 have the same part numbers or just 2001 like my Altima.

[dcioffi999]

come on guys put your thinking caps on what would you check or change after the distributor /cam timing sensor or c.a.s. is there any way to check for a bad e.c.u, keep in mind this all started when the car kept over heating and then finally blew a head gasket. now only will fire on spray ( WE HAVE NO INJECTOR PLUS )

[Timothy S]

Here is a link to part numbers for the ECM. It looks like they changed part numbers close to once a year. you'd need to find which one of the numbers is on your car (23710-L30011 or 23710-L30012 if a California car; 23710-L30033 if non -CA) [http://www.courtesyparts.com/altima-par ... _3554.html]
So, if this is your first start since replacing the head gasket, could we have a mismatched connection? wrong lead to wrong fuel injector? I've been stumped by mixed up spark plug wires before-could that happen to fuel injectors?
If you were to label them by position and switch them around, I think the worst case scenario is it does not start.
Do you have two connectors plugged into the distributor-one near the top front and the other on the bottom? Maybe some connection is lose or forgotten?

[dcioffi999]

when I seen that white smoke was coming out the tail pipe I knew that the head gasket had finally blew but had to keep on starting it back up when it had cooled down some what so I could get to a safe spot after a couple of stalls and restarts it would crank but not start. after having the head rebuilt an new head gasket it wouldn't start found some bad compression due to piston rings,had the block milled ,installed new pistons and rings,still no start thats when we found that we had no injector pluse then went onto replacing the distrib. now what! well auto tech at local garage wanted to replace the computer.

the first 5 numbers match the first 5 numbers that Nissan gave me threw my v.i.n but does not match any numbers that are on my computer, that I pulled out from in front of the center console. those numbers are
ja56p79-eo2oxo6 or
5ze1wt
now did I pull the wrong part out from console its up almost on the fire wall has a 10mm bolt for wiring harness and 4 philips screws to remove from bracket?

[Timothy S]

The ECM should be in the passenger side of the center console. It sounds like you have the right part. [https://lh6.googleusercontent.com/-Eh7b ... 5B1%5D.JPG]

[dcioffi999]

is there a way to check my ecm before I go buy one what pin gets the signal from the distribor how else I can track down a no pulse issue

[Timothy S]

ChecK the Nissan Factory Service Manual (FSM) here at NICO. [http://www.nicoclub.com/FSM/Altima/2001/ec.pdf] page 259-265 says ecm connector terminal 40 puts out intermittent 2.5v and terminal 41 puts out short 0.5v spikes.
ports 102, 104,107,109 are the fuel injector outputs. pages 451-453 indicate you can test these ports while the engine is running, probably by back probing the wires and you should see intermittent 12v pulses if measuring port to vehicle metal (ground). The left hand side of the ecm connector has two 9-pin square blocks. looks a little like this:
101 102 103 104 105 106
107 108 109 110 111 112
113 114 115 116 117 118

[dcioffi999]

can I still do this test if the car is not running ??

[Timothy S]

The test should still work with engine not running as long as you have someone cranking the engine- when you are trying to start the engine the injectors still need to fire, so the engine can start.
I think you can trust the dealer as far as the ECM part numbers. There's only two types of ECM for the 2001 Altima.

[dcioffi999]

im trying to figure out if my new computer that I put in my car has to be flashed. my car is at Nissan and they said it just had to be programed to my key. is there a difference ???

[Timothy S]

The Engine Control Module does have Firmware (an operating system just like a smart phone) that the dealer can reload. I have read about people modifying this when tuning cars for racing, but don't know if it would have come pre-loaded on the ECU. It sounds like it did not.
I'm still wondering if this will fix the problem, or if there was an underlying issue that fried the original ECU.