spfi swap questions to button it up

[scubaroo84]

I just did the spfi swap on my ea81. Got rid of my weber and will be taking the turbo off as I couldn't get enough fuel through the carb under boost. (Possibly see in the future if I can make it work with spfi.

 

Anyways, after ironing things out all day and finding a bad idle switch in the tps was my cause for not starting I got it running and it runs and sounds awesome. Runs way better than the weber did. Only problem is I have code 34 (egr solenoid) I have the purge solenoid and the egr solenoid hooked up near the ecu (pulled the wires out of the harness and spliced them closer to the ecu for less cluttering in the engine bay). Purge valve works fine, I read I can put a 35ohm resistor in place of it to trick the computer. What I need is the resistance of the egr solenoid, what it is actually supposed to be. I pulled almost 9 ohms from it but since the ecu is telling me there's a problem with it (I know the ecu is vague with its code) I would like to know what the resistance is so I can put a resistor in place of it.

 

Another thing, how does this solenoid work? I pulled it apart and found there is a needle kind of like in a carbs needle and seat and am wondering if vacuum has to move that needle to stop the code. If so I'll just hook a vac source to it for now.

 

And one more thing. I have a glowshift afr gauge that has a control module with data logging output. It has a narrowband+ (0-1v), wideband+ (0-5v) and a common - for both. Oreilly's says our o2 is .2-.8v. Does anyone know if I could hook my computer o2 output up to the narrowband + for the computer since I already have a brand new o2 sensor in there for the gauge? Or will I have to get a narrowband o2? I know they're cheap.

 

Thanks for any help!

[TomRhere]

You need 34 Ohm resistors for both the EGR and Purge Solenoids.

 

All the ECU is looking for is the resistance value of the coils, it could care less if any of the systems are actually working.

 

Can't help with the O2 question.

[scubaroo84]

Sweet thanks for the input. If they're both 34 then the egr was bad anways. Now to find a resistor.

[Gloyale]

The EGR code is 34

 

Ohms of the resistior should be 33 ohm.  You likely won't find a 34 Ohm.

[scubaroo84]

I found a 34 ohm resistor on ebay but they're a pack of 100 for $6.75. I don't need 100 of them but I bought it anyways. Maybe I can find another project that will need some reistors. I hooked up the o2 to the data logger output both the narrowband + and the negative since I figured the ecu is probably putting out voltage to the o2 sensor and neither worked, the car bogged a few rpm but the afr gauge didn't change. It idles lean right now 16-17 afr and when trying to drive up my driveway hesitates and goes super rich 11-12afr so I'll just spend the $16 for another o2 and get another bung. Thanks for the help guys.

[Scooner]

Scuba, what car did you get the spfi off of and what car did you put this on? I brought home a basically free 88' GL Wagon that has a FI ea that i thought could go on my ea71 but from what i read, doesn't seem likely. I am thinking of putting an EA81 with the spfi and dual range 5 speed in the Brat now. Do you have any pics of what you've done? Thanks!

[scubaroo84]

I got the spfi off an 88 dl with a black ecu I got a second ecu from a 93 gl with a silver ecu because trouble shooting with the fsm told me the first ecu was bad. After replacing the tps is works fine. I installed the setup on my 84 gl wagon. You can find my build thread in the members rides section. I havent updated it in awhile.

 

The original ea81 has ported/polished heads, new gaskets and valve seals, I built a turbo header with a ihi rhb5 turbo off an 87 wagon. Originally I had a blowthrough weber 32/36 but couldnt get enough fuel through it under boost. (Just needed huge jets). I will try hooking up the turbo and run about 4psi once I get the spfi buttoned up.

 

Here's a pic from this morning. I will be cleaning it up but I was trying to get it running first.