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d4 light flashing and wont start *sometimes*

 
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Old 01-21-2011, 02:59 AM
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d4 light flashing and wont start *sometimes*

Hello all, first post. Please read and help if you can.

Long time issue. sparatic at best.

1993 Prelude H23a 2.3 Auto
Pushing 190K, owned since 115K. Rebuilt Tranny at 155K.

So my D4 light is blinking and my car wont start on occasion. Never first thing in the morning. Never last thing after work. Only when I have been driving it for a good 20+ minutes, then come to a stop, turn off the engine, come back minutes later and car wont start. Car just cranks and cranks and D4 Light just blinks away. No consistent codes, just a consistent blink.
I pull the key, sit around for a few (3-10) minutes or as long as it takes, reinsert the key and off I go. Happens once in a blue moon or really when it wants to. Sometimes weeks and months will pass and then it happens again.

The car did this when I was a long ways from home once, except it wouldn't start. got it towed back home. Checked for fuel, spark and ignition. Ended up being the distributors death. I replaced it and off I went again.

The car was stolen at one point back in 2007 and in turn the ignition switch was screwed with, initially the key wouldn't turn but I got it working again and have been using it since with no issues? This wasn't always the issue, I think it started happening about a year after my car theft.

I diagnosed the issue before (jumpered the blue connector under the dash) Never really got any answers. Codes were * I believe. 7,8,1,2 if that makes sense.

No alarm is in the car. All stock. Nothing special just a great running car despite this issue.

and I dont know if this could be related but probably.
*My ignition key light turns on, my door chime, my headlight warning signal and overhead lamp functions (like it should) at seldom times, but when all these work my power door locks stop working. This happens as much as my car wont start and blinks D4....

Much thanks for ideas or suggestions. My thoughts are bad TCM, bad ECU, bad ignition switch or maybe tranny? This is my daily driver.

Last edited by mattreed; 01-21-2011 at 03:12 AM.
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Old 01-21-2011, 09:28 AM
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Re: d4 light flashing and wont start *sometimes*

you are a so I will be generous.................... this time.

'PZ' 4th gen resource guide v.2 - closed-

D/L repair guide

Search: "D4"

Results pg 11-44
The MIL and D4 indicator light may light simultaneously when the code blinks 6, 7 and 17.
Check the PGM-FI system according to the PGM-FI system troubleshooting, then recheck the D4 indicator light. lf it lights, see page 14-36.


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Old 01-21-2011, 11:34 AM
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Re: d4 light flashing and wont start *sometimes*

I'm guessing it's a transmission failure thing. When my auto's D4 light turned completely off it started having trans problems, like trans fluid mysteriously disappearing.

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Old 01-21-2011, 03:12 PM
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Re: d4 light flashing and wont start *sometimes*

main fuse relay....
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Old 01-21-2011, 03:55 PM
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Re: d4 light flashing and wont start *sometimes*

The D4 is usually due to the VSS taking a sh*t on you!!!
Since ur a noob....VSS syands for Vehicle Speed Sensor!!!

As far as the car not turning over....that you'd have to get that checked out by a mech!!!
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Old 02-16-2014, 09:06 PM
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Re: d4 light flashing and wont start *sometimes*

hi I was wondering if you ever figured out what was wrong? I'm having the exact same problems. h23 engine as well. if you remember what it was could you let me know.
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Old 02-16-2014, 11:27 PM
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Re: d4 light flashing and wont start *sometimes*

I have a 93 4ws Si H23a1 prelude myself, I had an odd electrical problem like this and had my d4 light yelling at me and my car only started sometimes. I heard about a 100 different things from everyone I talked to! I ended up pulling out the Main Relay to find that it was uber fried lol. After I swapped it, I never had problems starting her up again and that d4 light disappeared. You could always check the solder points on your main relay and re-solder them instead of paying for a new one.

In any case, that might be your problem...but then again...gotta love working on preludes lol
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