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Old 02-06-2019, 09:02 PM   #1
JonValdez
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1993 Ex Speed Manuel, occasional power to injectors.

I bought a '93 accord ex from my uncle that has been sitting in the shop without starting for over 3 years and first thing i did was give it a new battery and me and my pops replaced the distributor. After that we replaced the Fuel pump Main Relay. Finally after messing with it for a few days it started and died a little bit after . Turning it again my pops realized that the alternator was bad so i replaced it with a new one from Auto-zone. Expecting it to turn it only cranked but never turned. So we went ahed and checked out a few things and realized that the fuel injectors weren't getting power half the time. Don't know why, any help please.
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Old 02-08-2019, 01:01 PM   #2
ukemike
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Electrical issues are no fun. My first thought was, "I wonder if this was a flood car?" I wonder if the computer is at fault. It might be worth pulling back the carpet and taking a look at it. If you see rust, scale, or other deterioration replace it with the same model from a local junkyard.

After that I'd try tracing the injector wires back and checking continuity, and looking for loose connections. Actually if you could hook up a voltmeter to the plug for one of the injectors, leave the key in the on position, and then wigggle the wire harness and all the relevant connectors while someone watches the dial, you may find the culprit that way. There are wiring diagrams to be found somewhere on this site those could help or add confusion.

http://www.cb7tuner.com/vbb/showthread.php?t=184559

I'd also look at the relevant fuses and relays.

Another good idea might be to ignore everything I say and listen to any of the wiser folks on this forum that might respond. That could save you a lot of time.
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Last edited by ukemike; 02-08-2019 at 01:06 PM. Reason: add link
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Old 02-22-2019, 12:21 PM   #3
JonValdez
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Quote:
Originally Posted by ukemike View Post
Electrical issues are no fun. My first thought was, "I wonder if this was a flood car?" I wonder if the computer is at fault. It might be worth pulling back the carpet and taking a look at it. If you see rust, scale, or other deterioration replace it with the same model from a local junkyard.

After that I'd try tracing the injector wires back and checking continuity, and looking for loose connections. Actually if you could hook up a voltmeter to the plug for one of the injectors, leave the key in the on position, and then wigggle the wire harness and all the relevant connectors while someone watches the dial, you may find the culprit that way. There are wiring diagrams to be found somewhere on this site those could help or add confusion.

http://www.cb7tuner.com/vbb/showthread.php?t=184559

I'd also look at the relevant fuses and relays.

Another good idea might be to ignore everything I say and listen to any of the wiser folks on this forum that might respond. That could save you a lot of time.

So we havent got back to check all the wires and all that. as far as parts go, i've replaced the alternator, the external coil for the distributor, and we're debating on picking up a computer from a local pick n pull .
Also replaced the ignition switch and it turned a few times but kept dying.
Still dont know why its loosing power man, will be tracing wires back soon.

also we've checked all fuses, all seem good.
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Old 02-22-2019, 12:24 PM   #4
JonValdez
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oh, and we did replace the Main relay because it had gone bad.
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Old 02-22-2019, 05:19 PM   #5
4CYLPOWER92
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I've heard of the resister going bad. Might wanna check that.
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Old 02-25-2019, 07:35 PM   #6
aventari
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What exactly do you mean by "fuel injectors weren't getting power half the time."?

How did you check for injector power?
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Old 02-26-2019, 06:52 PM   #7
JonValdez
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Originally Posted by 4CYLPOWER92 View Post
I've heard of the resister going bad. Might wanna check that.
Will go get new one and replace .
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Old 02-26-2019, 07:50 PM   #8
aventari
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Don't just throw parts at it, you need to figure out what's wrong first...
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Old 02-26-2019, 07:55 PM   #9
JonValdez
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Originally Posted by aventari View Post
What exactly do you mean by "fuel injectors weren't getting power half the time."?

How did you check for injector power?
Apologize, what i mean is thereís no spark when it comes to holding the spark plug from the coil to a ground , it sparks occasionally .
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Old 02-27-2019, 02:00 PM   #10
aventari
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Then your problem has nothing to do with fueling or injectors.

Your problem is ignition.

To be honest I'm actually worried about your ability to check spark even lol. Are you sure you didn't just move the coil wire too far away from ground and the spark stopped because it couldn't jump the gap?

I would recommend you put an old spark plug into the coil wire and hold the electrode against a metal part of the motor and crank it and make sure the spark is consistent.

https://www.youtube.com/watch?v=mUOmsGiirTU
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Old 02-28-2019, 02:34 PM   #11
JonValdez
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Quote:
Originally Posted by aventari View Post
Then your problem has nothing to do with fueling or injectors.

Your problem is ignition.

To be honest I'm actually worried about your ability to check spark even lol. Are you sure you didn't just move the coil wire too far away from ground and the spark stopped because it couldn't jump the gap?

I would recommend you put an old spark plug into the coil wire and hold the electrode against a metal part of the motor and crank it and make sure the spark is consistent.

https://www.youtube.com/watch?v=mUOmsGiirTU
Said injectors because the fuel injectors wasnt shooting sometimes, we had rented testers from o rieleys that showed a small light when the power was there while cranking and sometimes it wouldn't light. that is why i said injectors. i apologize if that's inaccurate.

lol i understand, personally im not too educated on these things but im picking from what i learn from my pops and translate it here, but no im sure its not because we moved the coil wire too far because we're holding it in the same spot and its sometime sparks sometimes doesn't.

and will try that and let you know what happens.
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Old 03-05-2019, 01:30 AM   #12
FragginDale
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If itís been sitting in a shop or somewhere I would check the wiring for mice damage to the wiring. Iíve had that happen on my other project. Also like aventari said check and make sure your getting spark. Tackle that and get it fixed then focus on the fuel and injector situation
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Old 03-08-2019, 12:57 AM   #13
JonValdez
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Quote:
Originally Posted by FragginDale View Post
If itís been sitting in a shop or somewhere I would check the wiring for mice damage to the wiring. Iíve had that happen on my other project. Also like aventari said check and make sure your getting spark. Tackle that and get it fixed then focus on the fuel and injector situation
Ok, appreciate that.
We actually did find some cut up wires, car started up and a friend of ours said the catalytic converter was no good anymore,
this cars been sitting way too long. really pumped to get it running.
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Old 03-18-2019, 02:34 AM   #14
FragginDale
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Any updates on how itís running?
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Old 03-25-2019, 11:53 PM   #15
JonValdez
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Originally Posted by FragginDale View Post
Any updates on how itís running?


No, unfortunately i havent had much time to put some work on it recently, i apologize.
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Old 03-28-2019, 05:48 AM   #16
FragginDale
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No worries man! Just wanted to check and see 🤙🏾 Iím picking up my car this weekend and itching to get started on it.
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Old 04-25-2019, 02:15 AM   #17
JonValdez
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Took her to someone that actually could get down and knew what they were doing. They got her going and up, found out it was a bunch of loose wiring and some bad grounds . Appreciate all the help and you guys were right about the wiring !

and best of luck to you man on your new car, hope all goes well.
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