I have a problem with my 2000 auto H22 Prelude. It will not start with the OBD1 H22 injectors I put in. It used to be Turbocharged with 450 DSMs w/ a resistor box. Now it is back to all motor, but cannot find the stock OBD2 injectors so I'm using a set of OBD1 H22 with resistor box instead. I am running the OBD2 ecu.

What could be the problem? Do I need to get OBD2 injectors? It will sometimes start in about the fifth or sixth try, but once you give it throttle, it will cut out. It will also cut out once it has idled for about 2 minutes on its own. Are the OBD1's too big in cc?

I'm lost at this point. I have doubled check everything else just for elimination purposes: ignition, timing, wiring, etc.. and everything looks to be fine. Thanks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HaveNoLife &raquo;</TD></TR><TR><TD CLASS="quote">I have a problem with my 2000 auto H22 Prelude. It will not start with the OBD1 H22 injectors I put in. It used to be Turbocharged with 450 DSMs w/ a resistor box. Now it is back to all motor, but cannot find the stock OBD2 injectors so I'm using a set of OBD1 H22 with resistor box instead. I am running the OBD2 ecu.

What could be the problem? Do I need to get OBD2 injectors? It will sometimes start in about the fifth or sixth try, but once you give it throttle, it will cut out. It will also cut out once it has idled for about 2 minutes on its own. Are the OBD1's too big in cc?

I'm lost at this point. I have doubled check everything else just for elimination purposes: ignition, timing, wiring, etc.. and everything looks to be fine. Thanks.</TD></TR></TABLE>

So it was OBDI converted before this? If so you probably have an OBDI dizzy which might be your problem.

Id pull the injectors and check them over.

 

obd2 vtec injectors are smaller than obd1 , its dumping wayy to much fuel,

the obd1 are 345s, and i want to say the obd2 are 290s.. i forget,

but reguarless i know the obd1 are bigger and there for the ecu thinks it has smaller injectors than it really does

edit: to correct fuel injector flwo rate


Modified by prelittlelude at 3:37 PM 8/11/2004

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">obd2 vtec injectors are smaller than obd1 , its dumping wayy to much fuel,

the obd1 are 345s, and i want to say the obd2 are 240s.. i forget,

but reguarless i know the obd1 are bigger and there for the ecu thinks it has smaller injectors than it really does</TD></TR></TABLE>

That could be it. The stock fuel pressure regulator is pumping fuel at the OBDII injector rate which is a bit higher than the OBDI injector rate. OBDII = 47-54 psi at WOT. OBDI is around 8-10 psi less than that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">obd2 vtec injectors are smaller than obd1 , its dumping wayy to much fuel,

the obd1 are 345s, and i want to say the obd2 are 240s.. i forget,

but reguarless i know the obd1 are bigger and there for the ecu thinks it has smaller injectors than it really does </TD></TR></TABLE>

I agree, BTW the obd2's are 290cc.

 

Everything is OBD2, distributor, ecu, etc. except the OBD1 injectors.

So you guys are saying I need to get OBD2 injectors and it should solve the problem? For a minute I thought maybe it was the ECU. Or should I slap on an OBD1 pressure regulator, which I do have an extra off.

I did consider the size difference might flood, but strangely, after trying to start it for a minute or so, I pulled the spark plug out and there was not much fuel evident at all. That's why I thought it might be an ECU issue.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HaveNoLife &raquo;</TD></TR><TR><TD CLASS="quote">Everything is OBD2, distributor, ecu, etc. except the OBD1 injectors.

So you guys are saying I need to get OBD2 injectors and it should solve the problem? For a minute I thought maybe it was the ECU. Or should I slap on an OBD1 pressure regulator, which I do have an extra off.

I did consider the size difference might flood, but strangely, after trying to start it for a minute or so, I pulled the spark plug out and there was not much fuel evident at all. That's why I thought it might be an ECU issue.</TD></TR></TABLE>

IMO, id just buy an aftermarket FPR+gauge and call it a day.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HaveNoLife &raquo;</TD></TR><TR><TD CLASS="quote">Everything is OBD2, distributor, ecu, etc. except the OBD1 injectors.

So you guys are saying I need to get OBD2 injectors and it should solve the problem? For a minute I thought maybe it was the ECU. Or should I slap on an OBD1 pressure regulator, which I do have an extra off.

I did consider the size difference might flood, but strangely, after trying to start it for a minute or so, I pulled the spark plug out and there was not much fuel evident at all. That's why I thought it might be an ECU issue.</TD></TR></TABLE>

even if you swap the obd1 fuel regulator on then your fuel press is right but the ecu still thinks its trying to run the car on 290s, so it will still be dumping way to much fuel

because a fuel injectors thats 290cc runing at 3ms is not going to dump as much fuel as a 345cc injector runing at 3ms,

 

guys honestly even if it is a lot of fuel the car should at least START. The problem has to be something else.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dumbest bastard on the internet &raquo;</TD></TR><TR><TD CLASS="quote">guys honestly even if it is a lot of fuel the car should at least START. The problem has to be something else.</TD></TR></TABLE>

hmm he has a point. still not gonna run right though,

but if its a 5th gen and someone said the run 50psi+ static, plus the injectors being 345s thats a lot of fuel

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">

hmm he has a point. still not gonna run right though,

but if its a 5th gen and someone said the run 50psi+ static, plus the injectors being 345s thats a lot of fuel</TD></TR></TABLE>

nice quote job LOL

 

It'll start about once every 6th or 7th try and it'll idle for about 2 minutes or so and then die. I notice the fuel line from the pressure regulator shakes at idle. Could that mean the fuel pump is going bad and not providing enough fuel or the pressure regulator is bad?

Also, another thought, can I use stock OBD1 Civic EX injectors and if I can, do I need the resistor box?