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-   -   90 hatch, dpfi, solid cel, details inside (https://www.homemadeturbo.com/engine-management-10/90-hatch-dpfi-solid-cel-details-inside-46149/)

45psi 09-15-2005 03:50 AM
90 hatch, dpfi, solid cel, details inside
 
i have a 90 hatch with dpfi

the fuel pump is hot wired to a switch, the cel comes on right when i turn the key (power on before the starter switch)

i tried to bump start it by towing it for 2 blocks in first gear but it just wouldnt go on its own.

my buddies 91 dpfi hatch was there so i swapped ecu's to check it and his lit up with a solid cel in my car, but both ecu's worked fine on his car.

any ideas would help me greatly. thanks guys.

Chris Harris 09-15-2005 03:43 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
Weird...both ECUs light up solid in your car but are fine in his.

I'm not sure what to tell you... :-\

Ravage70 09-15-2005 05:01 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
grounds?

45psi 09-15-2005 06:03 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
checked them all. i have the dash pulled now and am hunting with the manual and multimeter.

tranceminister 09-15-2005 07:36 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
Let the fun begin :D Good luck man. Hunting down problems like that is alway's an adventure.

45psi 09-15-2005 07:52 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
ok, i fixed the solid cel. the negative battery terminal was missing the smaller chassis ground. i ghetto'd one up real fast and no more solid cel. no codes at all, but my ---- still wont start. gonna try towing it in first again

Ravage70 09-15-2005 08:27 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
do i get free knuckles now? :P

45psi 09-17-2005 12:54 AM
Re: 90 hatch, dpfi, solid cel, details inside
 
im still getting a solid cel when the fuel pump is off, but i get no codes when the fuel pump is on, so i tried to bump start it again with no codes, fuel pump on and i still have a car that doesnt run. i'm about to just sell this as a shell... ----. *any ideas guys? im out of them atm. thanks.

Ravage70 09-17-2005 01:54 AM
Re: 90 hatch, dpfi, solid cel, details inside
 
if the car doesnt crank check ur main relay

45psi 09-18-2005 06:04 AM
Re: 90 hatch, dpfi, solid cel, details inside
 
who ever had the car before me pretended to be a wireing master. already had the dash pulled so i pulled the heater core all air ducts and sound deadening material i found like 3 wires worn and just twisted together. i soldered them all up and i resoldered everything in 3 of the main relays that i have. im still stranded... ill keep y'all updated though

mycrx 09-18-2005 09:16 AM
Re: 90 hatch, dpfi, solid cel, details inside
 
good luck with it colton, sounds like what mine was kind of doing when i was telling u about it, first thing i did check for fuel,spark,compression if those are all good then its basic guess and check til you get it right, so let me get this right bro when u have the fuel pump on its throughs a solid cel when its off it wont right?

45psi 09-18-2005 06:30 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
with the ignition on:

fuel pump on = no cel

fuel pump off = solid cel

45psi 09-18-2005 11:16 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
ok, i got the main relay clicking, everythings good, but now im thowing a code 16. i changed injectors and the fpr and no starting... anyone in WA want a ef hatch shell?

Chris Harris 09-20-2005 02:15 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
Check and make sure all of your injectors are firing

ZC4ME 09-20-2005 06:35 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
Originally Posted by 45psi
ok, i got the main relay clicking, everythings good, but now im thowing a code 16. i changed injectors and the fpr and no starting... anyone in WA want a ef hatch shell?
Hey, there is a fuse in the underdash box that supplies power to the fuel pump, main relay, ecu and a couple of other things. When this fuse is blown, the car will crank but will not start, but you will also get no check engine light cause the ecu is not working. What I am thinking, is that somehow, when you turn on the "fuel pump switch" it is backfeeding some of the other circuits and allowing you to get cel, but still not working right. Hope your following me here. So, with you saying that there were some wires that were shorted, I am thinking the ELD has gone bad. The ELD is located in the underhood fuse box, open that box and sniff it (lol, I said sniff the box). If it smells burnt or has an "electrical smell" to it, it is most likely bad. If you have one you can swap it with, swap it out and make sure the fuse that I mentioned is still good and give it a try. If you have any questions or if nothing I said made sense, you can shoot me an email or PM (if they are working).

cloud 09-21-2005 02:56 AM
Re: 90 hatch, dpfi, solid cel, details inside
 
Originally Posted by 45psi
ok, i got the main relay clicking, everythings good, but now im thowing a code 16. i changed injectors and the fpr and no starting... anyone in WA want a ef hatch shell?
Just shell?

ZC4ME 09-22-2005 10:34 AM
Re: 90 hatch, dpfi, solid cel, details inside
 
So what is going on with this? Did you figure it out?

cloud 09-22-2005 06:21 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
Originally Posted by ZC4ME
Originally Posted by 45psi
ok, i got the main relay clicking, everythings good, but now im thowing a code 16. i changed injectors and the fpr and no starting... anyone in WA want a ef hatch shell?
Hey, there is a fuse in the underdash box that supplies power to the fuel pump, main relay, ecu and a couple of other things. When this fuse is blown, the car will crank but will not start, but you will also get no check engine light cause the ecu is not working. What I am thinking, is that somehow, when you turn on the "fuel pump switch" it is backfeeding some of the other circuits and allowing you to get cel, but still not working right. Hope your following me here. So, with you saying that there were some wires that were shorted, I am thinking the ELD has gone bad. The ELD is located in the underhood fuse box, open that box and sniff it (lol, I said sniff the box). If it smells burnt or has an "electrical smell" to it, it is most likely bad. If you have one you can swap it with, swap it out and make sure the fuse that I mentioned is still good and give it a try. If you have any questions or if nothing I said made sense, you can shoot me an email or PM (if they are working).
?? My 89 dx doesn't have a fuel pump fuse. All the wiring diagrams I've seen for 88-91 civic's show the fuel pump connecting directly to the main relay.


45psi 09-29-2005 10:48 PM
Re: 90 hatch, dpfi, solid cel, details inside
 
yup, i resoldered my main relay and every thing runs good now. just put a new headgasket on too.


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