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I have another 91 Honda Accord lx 2.2. No spark and no fuel. Checked for grounds. Starting today going to check for power to Ecu and main relay. The engine light comes on and stays on. No fuel prime and no spark at plugs. Battery was removed so no codes. Tried to get codes but when I jumped the plug the light did not flash stayed on. All fuses checked good. Can this be a bad Ecu or wiring issue. I have also checked ignition switch has power at all points. Any help would be greatly appreciated.
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It sounds like it’s cranking since he mentioned no spark. Try hooking a scanner up thats capable of live data. See if it responds that way. Will tell you if the ecm is powered and somewhat functional
Been checking things and found no spark at coil. Has power but not producing spark. Ecu grounded. Checked Mai relay. My other accord I noticed that the main relay clicks 3 times. This accord clicks 1 time when key is turned on. Checked ignition switch has power at right time. Checking Ecu noticed that 12 in but not sure what pins to check coming out.wondering if something else in dizzy bad.
[quote=”Rob781″ post=172801]does the enine crank??[/quote]
does the engine crank????
if you dont get it to crank there is no bother to check spark because you will never have any… and the coils will not engage eitherWill try but battery has been disconnected for quite awhile. When I hooked battery to it the comes on and stays on. The relay clicks one time only. When I used jumper to get codes the light never flashed. Stayed on. I am starting to think my no fuel is related to no spark. No spark out of coil. Bought new one and still no spark. Opened Ecu everything looks good. Using test light everything shows coil should be firing but it’s not. Checked fuel pump. Put 12 volts to it it comes on. So from my past experience it was main relay causing no fuel pump. Not sure what to check next. Probably start with no spark as see where it takes me from there. I am always open to any suggestions to help try to fix.
No I have not. The engine light will stay on if it does not get signal from any sensor am I correct? Will check crankshaft sensor. Further testing I found no spark out of coil. Replaced and still no spark.
ya I would check the crank and cam sencor… and let us know…. the crank sensors are comen to go bad causing no spark when you have crank
Test the ECU
Remove it and test for continuity to transistor chips. Find ignition cool pins and test from crankshaft pin
Test pin from end to where the circuit board is then from pin to transistor chipSometimes there’s contact issues where the ECU pins meet the circuit board
The other pin to check is main power to ecu to ecu ground and to transistor chips. Sometimes you have to change the multimeter settings to get lifeOk here is an update on my 91 accord. I have now replaced the distributor with one that come out of my daily. No spark out of coil. I have tried the e m out of daily and no change. I would not want to believe all the sensors are bad. That I am aware of there is not one plug for all sensors. Does anyone know what color wire comes out of Ecu for me to check? I have now realized that this is wiring. Not sure where to begin. Suggestions?
I swapped out Ecu out of daily and no change. No spark , no fuel. Swapped out main relay and still no change. Lost and not sure what to do.
Update on 91 accord. Ran new grounds. Checked ignition switch. Put main relay and Ecuador in my daily and works fine. Tells me wiring issue. I found a Pinout for the ecu and going to start there. What I think is that the ecu is not getting feedback from sensors. No injectors clicking. No spark from coil. Even if I swap dizzy from one car to the other. Any other ideas? Help me please!
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