Problem with fuel injectors!

btwilson86 · 07-30-2008, 05:03 AM

Power/ground to ECU could be the problem... The injectors are controlled by it. One test you can do (if it's dark out) is to get a 3V LED from Radio Shack or somewhere similar. Pull each injector plug off (one at a time to avoid confusion), and stick the contacts for the LED into the harness plug. Have someone try to start the engine. If the LED flickers (it'll flicker very rapidly if it does), then you're getting power to the injectors and it's not likely an electrical issue. Be sure to do this at night, as the LED will be on/off so quick it doesn't get much of a chance to illuminate.

Trust me, this works. I did the same thing on my 7MGE when I swapped it into my 87 N/A. It wouldn't start due to the distributor being 180 out, but I was checking all the possible reasons for it not to start.

Let us know if this helps, and also be sure to check at the ECU for Power and Ground.

07-30-2008, 05:03 AM	#4
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Power/ground to ECU could be the problem... The injectors are controlled by it. One test you can do (if it's dark out) is to get a 3V LED from Radio Shack or somewhere similar. Pull each injector plug off (one at a time to avoid confusion), and stick the contacts for the LED into the harness plug. Have someone try to start the engine. If the LED flickers (it'll flicker very rapidly if it does), then you're getting power to the injectors and it's not likely an electrical issue. Be sure to do this at night, as the LED will be on/off so quick it doesn't get much of a chance to illuminate. Trust me, this works. I did the same thing on my 7MGE when I swapped it into my 87 N/A. It wouldn't start due to the distributor being 180 out, but I was checking all the possible reasons for it not to start. Let us know if this helps, and also be sure to check at the ECU for Power and Ground. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

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