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We just put an engine ina 91 Maxima. Engine was run tested ...

Sent to Car Experts August 29, 2006 10:06 a.m.

We just put an engine ina 91 Maxima. Engine was run tested before install. Now the injectors are not firing. We used the injectors and distributor from the original engine. I have fuel to the injectors and have fire. Car runs great on a steady stream of ether. I have a parts yard and we have swapped ECM's and distributors but cannot get the inj to fire. Any help??

Optional Information:
1991 Nissan Maxima 3.0 SOHC

Already Tried:
Different ECM, different distributor

Customer (name blocked for privacy)

Status: Closed Value: $30

Answer
August 29, 2006 10:55 a.m. (48 minutes and 21 seconds later)

REPLIED

The 'trigger' for the injectors comes from the ECU itself, therfore if you have +12v on one terminal of each injector connector, then the ECU must not be receiving proper power and ground to operate. Does the Check Engine Lamp illuminate when the key is turned ON? Also, test the injector pulse with an inexpensive Noid Lamp, which you can purchase at most parts suppliers.

Do you have a volt meter for testing?

-Rip

Edited by RIP180OUT on August 29 2006 at 10:56am

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Reply to RIP
Sent August 29, 2006 10:27 p.m. (11 hours and 31 minutes later)

Hi Rip. Thanks. Not sure if the check engine light is on. The injectors have been checked with a noid light. They are not firing We can manually make them fire by putting juice to them. I wasn't sure if the ECM or the distributor fired the injectors. I will check the ground to the ECM in the AM. I will let you know. Thanks again.

Customer (name blocked for privacy)

Answer
August 29, 2006 10:32 p.m. (5 minutes and 17 seconds later)

REPLIED

If they are not firing with a Noid Lamp, we need to verify if the Check Engine Lamp illuminates when the key is turned ON. If it doesn't this means the power or ground to the computer is interupted.

-Rip

__________________
Please click on "ACCEPT" if I was helpful-or if you still need assistance just reply, before leaving any feedback thanks

RIP -- Lead Technician -- 100% Positive Feedback on 2106 Car Accepts
A.S.E. Master Technician, Advanced Level, Smog - European, Domestic, & Asian -- Car Category Mentor

Reply to RIP
Sent August 30, 2006 10:09 a.m. (11 hours and 37 minutes later)

Hey Rip. The check engine light is on when the key is on. We let the car idle on ether and the light went out. Any other ideas??

Customer (name blocked for privacy)

Answer
August 30, 2006 11:56 a.m. (1 hour and 46 minutes later)

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RIP -- Lead Technician -- 100% Positive Feedback on 2106 Car Accepts
A.S.E. Master Technician, Advanced Level, Smog - European, Domestic, & Asian -- Car Category Mentor

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