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Old 03/14/2012, 11:09 AM   #1
91prelude515
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Default 1991 Honda Prelude Si won't start.

What could be causin this? New fuel pump in. I heard sumthin about main relay. I know the pump isn't gettin any power. And know w here I can get a driver side front fender?

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Old 03/14/2012, 11:20 AM   #2
ialuder
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Default Re: 1991 Honda Prelude Si won't start.

well if you turn the key over and you the fuel pump doesnt prime, id would check the connection to the pump. you did say you just replaced it. did the car start just fine before the swapped pumped?

fender go to wrench n go. that year prelude is popular there. if not check preludepower.com its a huge 3rd gen prelude site. im sure some one is parting one out on there.


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Old 03/14/2012, 03:27 PM   #3
H22APWRD94
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Default Re: 1991 Honda Prelude Si won't start.

If you are not getting power to the pump, the main relay is a possibility, as well as chassis grounds, or possibly an ECU issue. Main relay would be the first thing I check.

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Old 03/15/2012, 08:27 AM   #4
91prelude515
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Default Re: 1991 Honda Prelude Si won't start.

Ok. Is there a way a to check ECU and I see sum connectors or fuses of sum sort on both back sides of the of the tank. I'm not sure if sumthin goes there. Tryin to post pic.

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Old 03/15/2012, 12:10 PM   #5
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Default Re: 1991 Honda Prelude Si won't start.

TDC POSITION (TDC SENSOR)?

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Old 03/20/2012, 04:11 PM   #6
Dj Technick
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Default Re: 1991 Honda Prelude Si won't start.

Have you checked votage at the pump with a volt meter to make sure it's getting power? Have you checked all the other wires at the pump? If you're not getting power at the pump check that the relay is clicking over, if it isn't check to see if you're getting power at the relay. Start there. Your fuel pump should always prime.


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Old 03/24/2012, 09:33 AM   #7
91prelude515
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Default Re: 1991 Honda Prelude Si won't start.

Ok. Here is the problem. I'm not gettin anythin from the ecu on the right side. I opened it up and saw like sumthin was filled inside. So I'm guessin its bad. Ok my question is. Is it suppose to flash as well as the left side does? I'm just go into replace

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Old 03/30/2012, 02:35 PM   #8
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Default Re: 1991 Honda Prelude Si won't start.

So I think its bad. So my question is. 37820-PK3-A10, 531-307803. does the A10 means anythin. I'm lookin to place it. But I was told from a Honda Dealership that I need the same exact one. Is this true?

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Old 04/10/2012, 10:06 AM   #9
semnhondaguy
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Default Re: 1991 Honda Prelude Si won't start.

for a ecu? not true you do need one for a 90-91 prelude i believe that has the b20a or b21a1
whichever motor your car has and get the ecu from the same car so yes in the sense they were right yes it has to be a new or used version of your ecu

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Old 04/14/2012, 05:54 AM   #10
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Default Re: 1991 Honda Prelude Si won't start.

I can't help with the not starting thing, but I ran into a friend of a guy who is parting out a 4th gen with front end damage, but I'm not sure which side. I'm going to call him today and see what's I can grab and whether he still has that fender..and can post back here.

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