No Spark
09-11-2011, 07:34 PM
#1
No Spark
Well Just bought the car not getting any spark... iam getting fuel i changed both crank sensors and cam sensor, added extra grounds, tried starting fluid, changed the ignition switch new starter and battery, car does crank
the coil packs are getting voltage and so are the injectors
Security light flashes but turns off while cranking
Cel is on when in the ON position
Car specs
98 GXE or GLE
De-k Swaped ( car did run with this motor already)
Auto
etc
the coil packs are getting voltage and so are the injectors
Security light flashes but turns off while cranking
Cel is on when in the ON position
Car specs
98 GXE or GLE
De-k Swaped ( car did run with this motor already)
Auto
etc
Last edited by 93altima; 09-11-2011 at 07:41 PM.
09-11-2011, 09:53 PM
#4
Try testing each coil pack to a metal source to see if they are sparking? Just because the coil are receiving voltage doesn't necessarily mean that they are working or working optimally. Also have you checked the spark plugs themselves for corrosion on the terminals and the main part too?
IDK what to say, just giving my $.02 to try and help
IDK what to say, just giving my $.02 to try and help
09-11-2011, 10:42 PM
#7
Injectors I believe. But none the less check all grounds. Also check for continuity on the crank and cam sensor circuits, The sensors may be good but not relaying the information back to the ECU. 4th gens sometimes have issues with the harness breaking where it turns to go into the firewall. Especially with it being a DEK swap means that the harness has been moved around soo.
09-12-2011, 05:23 AM
#9
Try testing each coil pack to a metal source to see if they are sparking? Just because the coil are receiving voltage doesn't necessarily mean that they are working or working optimally. Also have you checked the spark plugs themselves for corrosion on the terminals and the main part too?
IDK what to say, just giving my $.02 to try and help
IDK what to say, just giving my $.02 to try and help
09-12-2011, 05:27 AM
#11
Injectors I believe. But none the less check all grounds. Also check for continuity on the crank and cam sensor circuits, The sensors may be good but not relaying the information back to the ECU. 4th gens sometimes have issues with the harness breaking where it turns to go into the firewall. Especially with it being a DEK swap means that the harness has been moved around soo.
09-13-2011, 07:37 AM
#14
Senior Member
Join Date: Sep 2009
Location: Worcester, MA
Posts: 4,011
Have verified that each coil is gettin sufficient voltage. If its cranking then that means the starting circuit is good.
A Bad MAF would still let the car start. Unless u shorted a bunch of wires for the coils or CPS or CKPS, im stumped
09-14-2011, 11:50 AM
#16
WTF
09-15-2011, 04:48 PM
#23
09-15-2011, 05:11 PM
#24
Finally, someone else that has the same idea as I did.
09-15-2011, 05:58 PM
#25
09-17-2011, 04:25 PM
#27
Subscribed to this thread. My 95 with normal vq has the same symptoms and Ive done just about all that he has done except harness swap and ECU change over. Its boggling because the car only has 133k miles.
09-17-2011, 04:45 PM
#28
100% chingon
Join Date: Oct 2005
Posts: 1,003
The one absolutely certain way to see what's happening is to either get hold of someone with an oscilloscope or tow it to a garage that has a computer tune-up system, the type that has a scope that shows the ignition traces.
If you put the scope input on the hot side of each coil pack in turn, you should see a spike waveform when the motor is cranked. If not, then either the ECU power output stage is fried, or the wiring harness, or both.
I was looking to buy a Sentra SE-R VI that had the same fault, it turned out the ECU was bad, the guy put a replacement in and it must have had a bad harness because it blew the second ECU as well. He was well pissed off.
As a quick test you MIGHT - I have never tried it - put a neon tester on the hot side of the coil and see if it pulses.
If you put the scope input on the hot side of each coil pack in turn, you should see a spike waveform when the motor is cranked. If not, then either the ECU power output stage is fried, or the wiring harness, or both.
I was looking to buy a Sentra SE-R VI that had the same fault, it turned out the ECU was bad, the guy put a replacement in and it must have had a bad harness because it blew the second ECU as well. He was well pissed off.
As a quick test you MIGHT - I have never tried it - put a neon tester on the hot side of the coil and see if it pulses.
09-19-2011, 11:49 AM
#29
Junior Member
Join Date: Oct 2010
Location: Phx, Arizona
Posts: 20
any update on this?? ive had my maxima sitting for a very long time onthis same issue. my car was running just fine. and all of a sudden one day going to work sputtered and turned off on me. i would try turning it back on and it did at first and i drove it for another few blocks and turned off again and wouldnt turn on any more. took it home and no spark. didnt really get to much help last time i asked. so its been sitting. im going to start working on it again with the thing mentioned above but if you find a solution let us all know what it was plz
Thx
Thx
09-21-2011, 08:41 PM
#31
ok ive changed the full engine harness and a new ecu pulled from a running parts car and still nothing changed all relays and checked every fuse still nothing, next is im switching out the lightweight crank pully for a stock one, then compression check, then body harness if nothing after that a brick thru the front windshield
this is my 3rd 4th gen and ive never been through any bull**** like this before
this is my 3rd 4th gen and ive never been through any bull**** like this before
09-21-2011, 09:27 PM
#32
09-22-2011, 08:07 AM
#34
To verify spark I would hook up a coil pack with a spark plug and have some one crank it to visibly see the spark. If the plugs are old they could be shot. If you get spark, verify the injectors are spraying/fuel pump fuse is in and pump working. If there is an afpr make sure it is adjusted to the proper pressure. If there is no spark check the 2 crank sensors. If none of this works send me the 00vi .
.
10-01-2011, 10:29 AM
#37
i already done removed the whole alarm system, i just put in a new motor so ill see if it starts today
10-02-2011, 08:15 PM
#39
