Tech / Misc Tech topics that don't seem to go elsewhere.
Sponsored by:
Sponsored by:

dpfi to mpfi won't start

Thread Tools
 
Search this Thread
 
Old Aug 1, 2004 | 12:37 PM
  #1  
Gcar's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Oct 2002
Posts: 65
Likes: 0
From: Houston, Texas, U.S.A.
Default dpfi to mpfi won't start

i checked everything all my wiring has been checked over and over....somthing is wrong...my injectors are not working....
89 dx swapped to a 94 vx head,94 intake,b18a tb,b18a injectors,91 dizzy,89 pm6 ecu
help
Reply
Old Aug 1, 2004 | 01:34 PM
  #2  
nuc79's Avatar
Honda-Tech Member
20 Year Member
 
Joined: Jan 2003
Posts: 672
Likes: 1
From: CID, IA
Default Re: dpfi to mpfi won't start (Gcar)

using the resistor box, right? or not?

not really needed w/obd1 injectors but put it there anyway.
Also, recheck mpfi conversion wiring at the ecu, and under the hood. esp ckp sensor wires.
Reply
Old Aug 1, 2004 | 06:02 PM
  #3  
Gcar's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Oct 2002
Posts: 65
Likes: 0
From: Houston, Texas, U.S.A.
Default Re: dpfi to mpfi won't start (nuc79)

yes i am using the resistor box...if i use the resistor box dont i need to use obd0 injectors...i have checked all my wires...everthing seems to be in order....i think i have a bad dizz...
Reply
Old Aug 1, 2004 | 08:01 PM
  #4  
nuc79's Avatar
Honda-Tech Member
20 Year Member
 
Joined: Jan 2003
Posts: 672
Likes: 1
From: CID, IA
Default Re: dpfi to mpfi won't start (Gcar)

it sounds like a bad dizzy then. pull a plug and wire, and check for spark.

if you're not getting any, check for resistance values on the ckp, cyl, and tdc pickups. should be about 376ohms each.

then test the ignitor(aka ICM), and the coil
Reply
Old Aug 2, 2004 | 06:57 AM
  #5  
92hatchattack's Avatar
Honda-Tech Member
 
Joined: Jan 2003
Posts: 665
Likes: 0
From: usa
Default Re: dpfi to mpfi won't start (nuc79)

how do you know its your injectors that arent working???? maybe your spark???

if your using obd1 injectors arent u supposed to just tie all the yellow / back wires together???


if your getting no spark try switching the white wires on the dizzy.
Reply
Old Aug 2, 2004 | 09:04 AM
  #6  
tgreaves's Avatar
Member
 
Joined: Aug 2001
Posts: 5,084
Likes: 0
From: Baltimore, maryland, usa
Default Re: dpfi to mpfi won't start (92hatchattack)

92hatchattack is right.. Try switching the white wires on the dizzy if your not getting any light.. Also to make sure your injectors are firing you can either buy a noid test light or get a low wattage 12volt light bulb and see if it flashes..
Reply
Old Aug 2, 2004 | 12:38 PM
  #7  
92hatchattack's Avatar
Honda-Tech Member
 
Joined: Jan 2003
Posts: 665
Likes: 0
From: usa
Default Re: dpfi to mpfi won't start (tgreaves)

what is this noid test light??????? im intrested....
Reply
Old Aug 2, 2004 | 12:38 PM
  #8  
Gcar's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Oct 2002
Posts: 65
Likes: 0
From: Houston, Texas, U.S.A.
Default Re: dpfi to mpfi won't start (tgreaves)

ok fellas... im getting spark...also my injectors are firing but very weak on #2,3,4 cyl not firing on #1....
Reply
Old Aug 2, 2004 | 12:45 PM
  #9  
92hatchattack's Avatar
Honda-Tech Member
 
Joined: Jan 2003
Posts: 665
Likes: 0
From: usa
Default Re: dpfi to mpfi won't start (Gcar)

use a multimeter from your injector to the ecu to make sure there is continuity.... maybe one of your connections came loose....
Reply
Old Aug 2, 2004 | 12:48 PM
  #10  
Gcar's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Oct 2002
Posts: 65
Likes: 0
From: Houston, Texas, U.S.A.
Default Re: dpfi to mpfi won't start (92hatchattack)

i'll try that i did that with the the dizzy everything seems ok but i'll try the injectors....
Reply
Old Aug 2, 2004 | 12:49 PM
  #11  
tgreaves's Avatar
Member
 
Joined: Aug 2001
Posts: 5,084
Likes: 0
From: Baltimore, maryland, usa
Default Re: dpfi to mpfi won't start (92hatchattack)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92hatchattack &raquo;</TD></TR><TR><TD CLASS="quote">what is this noid test light??????? im intrested....</TD></TR></TABLE>

Its a little light that you plug into your injector plug on the ecu side and you crank your car over.. The light will flash if the ecu is firing that injector.. Basically it just checks your wiring and ecu.. If you have a cylinder that isnt getting fuel you can use this to check to see if your wiring/ecu is bad or the injector is bad..

Heres a link to the snap-on set of them..
http://buy1.snapon.com/catalog...talog
Reply
Old Aug 2, 2004 | 12:52 PM
  #12  
92hatchattack's Avatar
Honda-Tech Member
 
Joined: Jan 2003
Posts: 665
Likes: 0
From: usa
Default Re: dpfi to mpfi won't start (tgreaves)

cool, so you do this when the car is not running??? or run the car running on 3 cylinders while checking the forth????

where can i find one of these and around how much do they cost&gt;?
Reply
Old Aug 2, 2004 | 12:54 PM
  #13  
92hatchattack's Avatar
Honda-Tech Member
 
Joined: Jan 2003
Posts: 665
Likes: 0
From: usa
Default Re: dpfi to mpfi won't start (92hatchattack)

oh just found the snap-on link didnt see it b4 lol
Reply
Old Aug 2, 2004 | 12:56 PM
  #14  
tgreaves's Avatar
Member
 
Joined: Aug 2001
Posts: 5,084
Likes: 0
From: Baltimore, maryland, usa
Default Re: dpfi to mpfi won't start (92hatchattack)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92hatchattack &raquo;</TD></TR><TR><TD CLASS="quote">cool, so you do this when the car is not running??? or run the car running on 3 cylinders while checking the forth????

where can i find one of these and around how much do they cost&gt;?</TD></TR></TABLE>

You can make them cheaper then snap-on sells them for.. Just get a low wattage bulb from radio shack and plug the wires into the harness.. I did this and it worked great..
Reply
Old Aug 2, 2004 | 12:58 PM
  #15  
92hatchattack's Avatar
Honda-Tech Member
 
Joined: Jan 2003
Posts: 665
Likes: 0
From: usa
Default Re: dpfi to mpfi won't start (tgreaves)

cool, thanks ... now again ... do you do the test while the car is running???
Reply
Old Aug 2, 2004 | 01:09 PM
  #16  
tgreaves's Avatar
Member
 
Joined: Aug 2001
Posts: 5,084
Likes: 0
From: Baltimore, maryland, usa
Default Re: dpfi to mpfi won't start (92hatchattack)

You can do that or you can unplug all the injectors and put the light on the harness to test and crank the motor..
Reply
Old Aug 2, 2004 | 01:33 PM
  #17  
92hatchattack's Avatar
Honda-Tech Member
 
Joined: Jan 2003
Posts: 665
Likes: 0
From: usa
Default Re: dpfi to mpfi won't start (tgreaves)

cool, thanks for the info ....
Reply
Old Aug 2, 2004 | 01:44 PM
  #18  
Gcar's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Oct 2002
Posts: 65
Likes: 0
From: Houston, Texas, U.S.A.
Default Re: dpfi to mpfi won't start (92hatchattack)

yea i bought a noid light from auto zone paid like 7 bucks for hondas get the bosch one....they have like 3 or 4 diff kinds.....
Reply
Old Aug 2, 2004 | 01:58 PM
  #19  
92hatchattack's Avatar
Honda-Tech Member
 
Joined: Jan 2003
Posts: 665
Likes: 0
From: usa
Default Re: dpfi to mpfi won't start (Gcar)

are the injectors your using obd0 or obd1???

if your b18a injectors are obd1 you shouldnt be using a resistor box with them if im correct..... anyone else wanna chime in?????
Reply
Old Aug 3, 2004 | 05:44 AM
  #20  
tgreaves's Avatar
Member
 
Joined: Aug 2001
Posts: 5,084
Likes: 0
From: Baltimore, maryland, usa
Default Re: dpfi to mpfi won't start (92hatchattack)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92hatchattack &raquo;</TD></TR><TR><TD CLASS="quote">are the injectors your using obd0 or obd1???

if your b18a injectors are obd1 you shouldnt be using a resistor box with them if im correct..... anyone else wanna chime in?????</TD></TR></TABLE>

Best way would be to put a dvom on them and check the resistance.. I have seen people that say they have one type of injector but it was actually another..
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Efmysedan
Honda CRX / EF Civic (1988 - 1991)
11
Apr 25, 2019 03:24 PM
96accordsir
Honda CRX / EF Civic (1988 - 1991)
5
Nov 21, 2008 02:05 PM
2poor2tune
Honda CRX / EF Civic (1988 - 1991)
3
Aug 28, 2008 01:32 AM
menappi
Honda CRX / EF Civic (1988 - 1991)
21
Nov 1, 2005 04:03 AM
ZCcivicBOI
Honda CRX / EF Civic (1988 - 1991)
1
Sep 9, 2005 10:57 AM




All times are GMT -8. The time now is 02:38 PM.