I'm posting this up for a friend of mine who has just dropped a JDM H22 into his CB7. He's running a Stock P13 and F22 wire harness. Vtec is not wired up yet and there is no O2 sensor or EGR. When starting the vehicle, it' cranks, fires for a split second and then dies. We're assuming the injectors aren't operating correctly seeing as how the system is pressurized.

Has anyone run into this problem, let's say... when dropping the same engine into their S model or another prelude/honda in general? Any suggestions you have would be greatly appreciated. Thanx.

 

Bump.

 

probably something with the dizzy if anything take the fuel rail off and put it so it fires into a plastic bag or something for when you crank it to see if it spits fuel.

 

It doesn't when the injectors are installed. When it's just the rail, yes... fuel. And there is spark.

 

Going by a wiring digram the only thing that pulses the injectors is the computer. So. . . why is the computer not sending the signal. Is the computer bad. Check your ground wires on the engine just to eliminate a bad ground. Double check your conectors on the pass side fender well. Is your cel on? if so what codes.

 

We've tried 3 known good ECM's. We've checked all grounds and all are good. The injector resistor is getting power and there are no broken connections between the resistor and the injectors. The voltmeter on every injector reads 0.00. We've tried another set of injectors and still nothing. The engine hasn't run long enough to throw a check engine light.

 

correct me if im wrong but isnt resistance measured by ohms? and shouldnt the resistor box be reading somewhere around 7-10 ohms...thats what my tuner told me but my car blew up so that doesnt say much bout him...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Unidentified &raquo;</TD></TR><TR><TD CLASS="quote">We've tried 3 known good ECM's. We've checked all grounds and all are good. The injector resistor is getting power and there are no broken connections between the resistor and the injectors. The voltmeter on every injector reads 0.00. We've tried another set of injectors and still nothing. The engine hasn't run long enough to throw a check engine light. </TD></TR></TABLE>

The injectors get an AC voltage waveform, it won't register anything on a DC tester.

Your problem is most likely spark, pull a plug and ground it to be absolutely sure you have spark.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Unidentified &raquo;</TD></TR><TR><TD CLASS="quote">I'm posting this up for a friend of mine who has just dropped a JDM H22 into his CB7. He's running a Stock P13 and F22 wire harness. Vtec is not wired up yet and there is no O2 sensor or EGR. When starting the vehicle, it' cranks, fires for a split second and then dies. We're assuming the injectors aren't operating correctly seeing as how the system is pressurized.

Has anyone run into this problem, let's say... when dropping the same engine into their S model or another prelude/honda in general? Any suggestions you have would be greatly appreciated. Thanx.</TD></TR></TABLE>
Does it run for a sec or just more like a back fire POP. Let me know.
Make sure you have gas LOL
check ur grounds TOO!
and if all fails swap out injectors and see if she runs...any honda injectors will start and run it, just don't jump on it to hard.

 

the car is mine guys i appreciate all the help... i tested everything i am just not being able to get the injectors to fire... i was told of a injector relay under the dash by a honda tech and he said they go out on cb7s all the time can anyone confirm this? from my understanding the resistor is what controls the pulse along with the ecu....


id love some help as i am trying to make the nashville h-t meet

thanks in advance

 

yeah so ive pretty much decided it is a wiring issue.... the injector resistor box is original equipment on the cb7 and i just plugged the harness in... spark is good and compression is perfect as well as timing... swapped ecu's and still no fire....it runs when u pour fuel into the intake manifold roughly of course but u get the idea... fuel is definately the issue... im kinda lost on how to go from here... if someone knows something i dont id love to hear all replies good or bad... and yeah it has gas in it LOL!

 

either main relay or fuel pump. hear if fuel pump primes
if it does then check injector wiring,

 

got fuel at the rail.... ill check the main relay

 

did the car run before the swap? if so then i doubt its the main relay. Are you sure the fuel return line is hooked up ok and the fpr and all is in order?

thats an odd *** problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">did the car run before the swap? if so then i doubt its the main relay. Are you sure the fuel return line is hooked up ok and the fpr and all is in order?

thats an odd *** problem.</TD></TR></TABLE>

yeah thats what i was thinking... it ran before without ever an issue with the main relay... i believe everything is good to go.... yeah it is an odd *** problem the fact that the car sat for a year and i didnt look at it for close to that long everything was unfamiliar

 

change your spark plugs.

 

done.


the injectors dont fire.

 

I currently seem to have the very same problem. I have an eg that I had a h22a which is obd1 in which ran but needed to be swapped due to bad rings. I had an extra h22a4 that I just swapped in and the only thing I changed was the wiring for the the injectors because I figured it would be best to go with the injectors that came with the engine. Well now it doenst seem that the injectors are firing. The questions I have are:
1. Does anyone know if a obd1 ecu can run the injectors from an obd2 engine?
2. if I removed the injector box(pain in the ***) does anyone think this would take car of the problem?
3. Has the OP solved the problem yet?

 

still nothing...

main relay is good.
all fuses are good.
injectors are good.
resistor box is good.
igniter is good.
ecu is good.
fuel pump is good.

im getting spark and fuel pressure....

im getting power to the injectors just no pulse..... im lost!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J-specCb4 &raquo;</TD></TR><TR><TD CLASS="quote">still nothing...

main relay is good.
all fuses are good.
injectors are good.
resistor box is good.
igniter is good.
ecu is good.
fuel pump is good.

im getting spark and fuel pressure....

im getting power to the injectors just no pulse..... im lost!
</TD></TR></TABLE>
That sucks. I will be working on mine again tomorrow. I will let you know if I figure anything out.

 

hmm, check the dead plug on the harness... on my lude its on the passenger side harness (looks like a blank plug). if thats missing, you'll get everything but the injectors won't open. Other than that, double check the grounds (t-stat, tranny), and then main relays. hth.

-l8r

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AmauryR &raquo;</TD></TR><TR><TD CLASS="quote">hmm, check the dead plug on the harness... on my lude its on the passenger side harness (looks like a blank plug). if thats missing, you'll get everything but the injectors won't open. Other than that, double check the grounds (t-stat, tranny), and then main relays. hth.

-l8r</TD></TR></TABLE>

ahhh the ol dead plug

I forgot about that, I can almost guarantee that's the problem. There have been threads like this in the past and thats what it was. Hellz yeah.

 

thanks for all the help guys i got it running tonight... one of the wires pulled out of the injector resistor box harness.... soooo stupid... at least i know ecverything is electrically within spec.

 

ok, I figured out my problem. Since the engine h22 I replaced in my eg was obd1 and I replaced it with an obd2 engine. I had to remove the resistor box and just reuse the obd1 distributor because of the crank position sensor. The car now idles like a champ.

 

same issue. 94 gsr in a 94 del slow. vtec, /w a rigged dizzy from a non vtech. Was working just fine & stopped working.

where is the injector resistor box?
Damn what a waste of time!

background:
new plugs, coil (tried 3), igniter, cap/rotor, timing's okay, 60 psi fuel, new battery, turns, no fire, seems to run with the injectors off! but not on, checked therm ground, 3 main relays (does it matter if it's the del sol or gsr relay?).

Thanks!