*UPDATE* She cranks but doesnt start! NOT at all!!! - Page 2 - Honda Prelude Forum

iidieiv619 · 11-02-2009, 10:30 PM

How about the Ignition Switch???
The Num. 4 Back Up fuse 10a busts as soon as I turn the ignition to ON.
Also a part of the Ignition Switch wire was partly split. Copper wire was visible.

G_Loc · 11-03-2009, 06:43 AM

As soon as the switch hits the 'ON' position, the pump will cycle to pressurize the system

G_Loc · 11-03-2009, 06:44 AM

Do you have a Helms?

iidieiv619 · 11-03-2009, 08:56 AM

Yes I have a Helms manual. I got it online from that tuner website.

iidieiv619 · 11-22-2009, 10:35 PM

After months of trial and error...

It came out to be the ECU
(Most likely resulted from jumping the car, when my alternator was bad and battery was dead...the jump fried the ECU!)
It caused fuses to blow. No spark from plugs. No fuel.

I bought another one from a junkyard, plugged it in and it fired up just right!!! Oh do I miss my car!!!

-I lost a lot of money trying to solve this problem...but...hey... I got NEW parts!

I HOPE THIS THREAD HAS HELPED OTHERS

jsmooney · 11-23-2009, 07:10 AM

wow - good job

I would have never guessed it was the ecu based on the original post, but apparently they do go bad (moreso on the newer cars than these older ones...)

Thurmont · 11-23-2009, 12:45 PM

I've been following this thread cause I have the exact same car/engine and am currently dealing with exactly the same problem. The difference being that I never jump started it. Fuel pump is fine. I pulled the ignitor (ie: Ignition module) and took it to Autozone. Their tester showed it as bad. Bought a new one for $50 and it still won't start. I'm going to take the ignitor back and have them test it also just to make sure I didn't get a DOA. Ignition coil was very close to spec according to the Helm's manual so I think it's ok. I'm out of ideas and about to drag the car to a shop.

Question: What did you pay for the ECU from the junkyard? What do they typically cost for new vs refurb vs junkyard ones?

Also: The ignitor was bad... could it's failure have caused another part to fail? Or could another part have caused the ignitor to fail?

jsmooney · 11-23-2009, 12:48 PM

you can get h23a1 Si ecu's for $20 easily...

davebrock · 11-26-2009, 11:10 AM

I got a 5th gen prelude.
Same problem...no spark.. i've changed icm, igniton coil etc and i'm now left thinking it's the ecu.
my ecu code is: 37820-p5m-g11 (if that means anything to ayone)
i so far cannot find the same ecu to replace mine with. does anyone know if any other ecus will work?