9BASE3

Correct. Only get fuel when I tie the grounds together.



Yup. Modified the harness. I double checked it to be sure I cut the right wires..



Weird, I know..

SPOautos

What are you phisically doing when you tie the grounds together? Tell us exactly how your putting them together. Are you just jumping the grounds from one inj plug to another? Did you splice them somehow?



Could it be that one of the ground wires from teh PFC to the injectors is bad? Maybe the pfc is seeing that one injector isnt grounded right and not firing so it shuts down the other injectors as well. Then when you tie them together and they all get ground it runs them fine???

9BASE3

I'm just jumping one ground to the other, as if I were using one signal to fire both injectors.. Like you said.



It does seem like signal is being lost somewhere between the ECU and the injector.. However, I've checked the harness THOROUGHLY and do not believe that is the problem.. My guess is *YET AGAIN* I got fucked over on a RX7 forum buying parts. Would come as no suprise to me, actually and would put me over the 5 THOUSAND dollar mark of bad business.



I can't believe that the injectors are at fault. Both seem to open no problem when they share a signal source, but don't do **** any other way.. UNLESS the CAS ties in there somewhere and is for some reason only working half the damn harness, my guess is I'm another 1300.00 poorer (PFC)



I'm doing all I can to keep my sanity right now... over a year of meticulous detail, attention, hard earned time and money still land me with a dead car.. Maybe I should trade the FD for 5 or 6 DSMs.. Hell one of them would surely run!

SPOautos

When you jump those ground does your car actually run ok or did you just jump the grounds and run the power straight off of 12v to see if they would "click"



STEPHEN

9BASE3

I appreciate your offer very much! I'll keep you posted on the results. I'm more than happy to feed you and pay your way if you do come.

9BASE3

When I jumped the ground, the car fired right up as if it was a factory mod. Unfortunately, I can't really tell you much else as the PFC hasn't learned the car yet and goes all crazy like 5-10 seconds after I start it (enters learn mode)..



I did click the injectors w/a 9V to make sure they both open..



^^That is how I initially decided that the injectors weren't even opening when I crank the car.. I didn't see, or smell gas so I decided to jump them (in case they were stuck or something..?). Both of them clicked. After that I tried to start the car.. Fired right up on the little drop of gas that got in there when I jumped them.. I then moved to the troubleshooting of why they weren't opening..



Does anyone have an ECU pinout with what color wires go where on the ECU/Harness? I remember being 99% positive about the cutting wire description on the PFC install.. but not quite 100%. I dunno... Maybe I did **** it up, but very doubtful. I'll have to double (Again) check. Maybe if I cut the wrong wire, by some stroke of strangeness it's causing this.. Thanks!!



Justin

9BASE3

Another longshot... Ground issue? Although I've triple checked that too... Is that a possibility?



Dammit... My brain hurts!

twinturborx7pete

i think that the PINOUTS that come with the PFC telling you to cut are backwards.. though i'm not sure. I think that i could somehow get a correct pinout for you.



The CAS DOES have control over injection and spark. I know this because if there is any interference by the CAS your car will act all sorts of nutty. Make sure your Dial and everything is not obstructed. Make sure the CAS is plugged in and getting voltage. They are electro-magnetic.



Grounds play an important issue. There should be one on the firewall, 2 under the UIM. One on the second harness (the one that has the battery and guages). There is also one on the coil harness, if you do not have the updated harness. I think that is it for grounds. I may be leaving one out.



I will have a harness for sale here soon probably. I plan on selling it separate from the engine. Its already modified for non seq and PFC. What color wires did you cut on the harness? I can always go out and double check to make sure you did the right ones.



Do you have constant fuel pressure?

9BASE3

Thanks for the information! I can't remember the colors.. But I can check when I get home.. I almost want to say I was confused about one of them, but it was a long time ago..



I'll check the CAS. I didn't do that due to the car running with the work around in place... But I'll do it anyway.



I have all the grounds on there, but will go over them again to ensure they are all making good contact.



Thanks for the info. I may be interested in that harness as well.. Let me know when it's time to go and I'll tell you if I need it or not. Thanks much for the help!



Oh... I do have good fuel pressure too.

93 R1

Make sure the 2 CAS connectors are plugged into the right plugs. I *think* the white plug is closer to the top. They are interchangable, but will **** up the idle.



**** pinout diagrams man. Put a stock ECU in the **********er and see if it starts. If it does then you have a bad PFC. If not then you have a bad harness or electrical problem like a bad ground or short.