Injector not firing - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

KingKong8247 · 02-28-2007, 09:09 PM

89 SOHC

Injectors not firing. Gets fuel to rail, has 12 volts to injector clips and like 3-4 while cranking.

I switched them out for other injectors but the same

Car cranks but wont turn over. Has spark.

Any idea?

drftwerks · 02-28-2007, 11:24 PM

does it start with carb cleaner

Z U L8R · 03-01-2007, 09:33 AM

first make sure there's no corrosion in the injector/injector plug. the ecu is what gives the injectors the grounds, get an ecu pinout and check for continuity from the ground wire on the injector plug to the corresponding pin on the ecu. if you don't have continuity then there's a break in the harness, first make sure the injector plug is in all the way, still no continuity then cut open the harness until you find the break in the wire, another option, although less professional is to run your own new wire from the ecu to the injector plugs but with a little patience you can isolate the problem and do it right. gl =]

KingKong8247 · 03-01-2007, 05:24 PM

Thanks for the replies

It starts with starter fluid

Im checking continuity now.

KingKong8247 · 03-01-2007, 08:23 PM

Yea no continuity between injectors and ecu.

I got pissed and since the injector clips looked pretty crappy I cut the ground wires and just grounded them to the block. Car started for about 2 seconds then died.

I dont get it though according to the FSM each ground wire for the injector goes to a separate pin. How could they all be broken?

02-28-2007, 09:09 PM	#1
KingKong8247 Zilvia Junkie Join Date: Mar 2002 Location: Jersey Age: 40 Posts: 555 Trader Rating: (0) Feedback Score: 0 reviews	Injector not firing 89 SOHC Injectors not firing. Gets fuel to rail, has 12 volts to injector clips and like 3-4 while cranking. I switched them out for other injectors but the same Car cranks but wont turn over. Has spark. Any idea? __________________ 90 240sx Coupe

02-28-2007, 11:24 PM	#2
drftwerks Nissanaholic! Join Date: Mar 2004 Location: california Posts: 2,343 Trader Rating: (1) Feedback Score: 1 reviews	does it start with carb cleaner __________________ giantroboteyes.wordpress.com/

03-01-2007, 05:24 PM	#4
KingKong8247 Zilvia Junkie Join Date: Mar 2002 Location: Jersey Age: 40 Posts: 555 Trader Rating: (0) Feedback Score: 0 reviews	Thanks for the replies It starts with starter fluid Im checking continuity now. __________________ 90 240sx Coupe

03-01-2007, 08:23 PM	#5
KingKong8247 Zilvia Junkie Join Date: Mar 2002 Location: Jersey Age: 40 Posts: 555 Trader Rating: (0) Feedback Score: 0 reviews	Yea no continuity between injectors and ecu. I got pissed and since the injector clips looked pretty crappy I cut the ground wires and just grounded them to the block. Car started for about 2 seconds then died. I dont get it though according to the FSM each ground wire for the injector goes to a separate pin. How could they all be broken? __________________ 90 240sx Coupe

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03-01-2007, 09:33 AM	#3
Z U L8R Zilvia FREAK! Join Date: Jan 2007 Location: Georgia Age: 43 Posts: 1,194 Trader Rating: (0) Feedback Score: 0 reviews	first make sure there's no corrosion in the injector/injector plug. the ecu is what gives the injectors the grounds, get an ecu pinout and check for continuity from the ground wire on the injector plug to the corresponding pin on the ecu. if you don't have continuity then there's a break in the harness, first make sure the injector plug is in all the way, still no continuity then cut open the harness until you find the break in the wire, another option, although less professional is to run your own new wire from the ecu to the injector plugs but with a little patience you can isolate the problem and do it right. gl =]