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Discussion Starter #1
Miss fire codes on cyl 3&4. Also A/F sensor B2S1 code. New plugs & coil packs (Denso). New AF sensor B2S1 (Denso). Same condition. Checked injectors. All ohm at 15 ohms. Compression at 150 on all cyl. Finally checked injector pulse signal and have nothing on cyl 3&4. ECU? Or is ecu not being told to fire those two injectors for some reason? Needing help. TIA
 

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05 camry 07 tacoma
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Erase codes install noid light/ start engine.
You should see a few pulses before ECU inhibits injectors if that is what is happening.
 

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05 camry 07 tacoma
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What i've read is ECU will continue to inhibit injector with current misfire code .
Can't say for sure.
Let us know what you fijnd out.
 

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05 camry 07 tacoma
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You do have bat v to the injectors correct?
If so verify circuit integrity from injectors to ECU.
 

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05 camry 07 tacoma
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2,400 Posts
Ok, need to verify if injector bat v at ECU and if circuit will carry at least a couple of amps.
Maybe could wire up a brake light bulb for testing
BBBind.com has schematics of injector to ECU.
Disconnect ECU/ connect bulb from ECU connector to ground.
Should light bright.
 

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Discussion Starter #9
Finally tracked it down to the ECU! Circuit Board Mechanics sent me a refurb and it's back on the road! Thanks for all your help CJ1!
 
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