93 Civic Fuel injector issue? - HondaCivicForum.com


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Old 07-25-2013, 10:10 AM
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Default 93 Civic Fuel injector issue?

I have a '93 Civic DX D15B7

It has been a very reliable car but last Tuesday it failed to start after sitting for 3 days. Here is what I have done so far:

Car turns over, all valves are moving
I have spark but no fuel at the cylinders
I have fuel at the fuel rail.

I swapped the ECU (junkyard, not a known good one) with no luck
The car acts the exact same with either ECU or no ECU at all installed.
No CEL or code to go off of
Tried disconnecting the TW switch and it finally gave a CEL.

Basically the Fuel injectors are not operating, it had no symptoms leading up to this to this.

Any ideas would be appreciated, Thanks

Mark
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Old 07-25-2013, 10:46 AM
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Try swapping out the main relay..
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Old 07-25-2013, 11:29 AM
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Well never mind, wouldn't you know it I monkey with it for 2 days to no avail only to figure it out 1 hour after posting here. Turns out it was the TW switch, but I needed a jump start because the battery was low by the time I tried disconnecting the switch.
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Old 04-18-2017, 04:54 PM
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Quote:
Originally Posted by Mark_30ish View Post
Well never mind, wouldn't you know it I monkey with it for 2 days to no avail only to figure it out 1 hour after posting here. Turns out it was the TW switch, but I needed a jump start because the battery was low by the time I tried disconnecting the switch.
did you replace the TW switch or was it just not connected?
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