H22SHtec

whats up, have an LS/V set up that ive been putting together. didnt have spark a week or so back, bought a brand new dizzy and have a **** ton of spark, but now, after the car ran.....i have no fuel. its in my 91 rex si. any 1 ever had this problem? or any ideas on how to fix?

thanks

fcm

Can you hear the fuel pump prime the fuel system when you turn ign. key to run, [not start]? 94

H22SHtec

yea, the pump primes and sends fuel while cranking, pulled the line to the rail to make sure.

fcm

Is there power, [12V+] at the injectors, [wire that is the same color on all 4 injectors]?

If not, check the PGM-FI Main Relay, [injector relays output].

If there is power at the injectors then they are not getting a ground pulse from the ECU/ECM, check to make sure both IGP1 and IGP2 have power, [12V+] on them when ign. switch is in run and start. 94

H22SHtec

no power out of the dizzy to the harness that plugs into the injector harness. what puzzles me is that it ran with the new dizzy in my friends car and mine and now it doesnt run. puzzled and getting mad chasin all these new problems around. main rly worked in his car as well.

fcm

The distributor has nothing to do with the injectors, the injectors get their power from the injector relay in the PGM-FI Main Relay, from the injector relay, [through the injector resistor, if your 91 CRX uses one] then to the injectors.

If there is no power at the injector plugs, then the problem is between the PGM-FI Main Relay and the injector plugs.94

H22SHtec

no resistor on the rex, does the pulse come from the ECU?

fcm

Yes, the ground pulse for the injectors comes from the ECU/ECM.

You have yet to confirm if you have power at the injector plugs, test for power at each injector plug, [wire that is the same color on all 4 injectors] with ign. switch in both the run and start position. 94

Fafsa Racing

I have the same problem.... Did you ever find out what the problem was?

H22SHtec

Yea car was obd0 and had to be switched to obd1 because of the degrees of timing.

Preludeadam97

I am having this problem on my 97 prelude SH, I get power to the wires on the injector plugs but the car will not run (I'm guessing no pulse?), I have replaced fuel pump, filters, main relay, and the ECU, only for the car to still not run. If anyone could please help me out it would be great. I'm ready to set the car ablaze and roll it down a hill....

fcm

Dead tread. 94

pogeeboy27

iTrader: (3)

What brand injectors? Try using stock ones or another known working set to see if the injectors are the issue.

fcm

[QUOTE=pogeeboy27;50872542]What brand injectors? Try using stock ones or another known working set to see if the injectors are the issue.[/QUO




Default Re: No Injector Pulse


Dead tread. 94

Vinny Boom-Botz

I am having a similar issue: Car will run on ether and I have plenty of pressure at the rail, not sure where to go next?

muellersfan

Car and engine?

popem2525

i know this is a super old thread but i am completely lost at trying to get my crx to run right now, i was driving and the car just died out similar symptoms to this guy fuel pump primes fuel at the rail the injectors are getting 12 volts with the key on from the main relay IGP1 and IGP2 are getting 12 volts with the key on. Any help is appreciated if you even see this thanks

JRCivic1

Do you have spark ? A coil or ICM failure is not uncommon... I have even seen a rotor button fail and separate from the shaft, which means it no longer makes the connection between the coil and each spark plug wire to deliver proper spark to each cylinder.