DiabSoule

Well as the title sujests My 7 is dead has been now for about 3 weeks. So i guess this is were i start typing in whats going on hopefully i dont get hit by those Spell Check Guys again. LMAO.. This is all i can deduce from being out there in this cold chicago weather. The Engine Rotates at what seems to be an aceptable RPM i have charged my battery and even tried starting the care with the 75 amp boost. to no avail. I have checked spark on the no.1 side leading and trailing are there. I have a fuel cut switch When i turn it on i can smell fuel when i try to start it. So I have Rotation, I have Spark, And i have Fuel. I have also tried various positions of holding the AFM Open. Im not sure but I have had quite abit of problems out of this car of late. I Have not done a compression test as of yet other than the old pull the plug and listen for the Pssst..Pssst...Pssst. I know i atleat get the first Two Psst.. LOL. Any help any guidance would be Awesome. I have all day tomorrow to work on it. Any Quick E.C.U. checks that i could perform would be great also. Thanks again.

Im ganna try for new sparky's tomorrow just to be sure that im getting good spark other than that im kinda lost

Rx-7Doctor

iTrader: (13)

Need to know alittle more. What type of symptons if any did you have before it stopped running? Did you check to see if the plugs were gas fouled? Did you check the main egi fuseable link? Also this cut off fuel switch is for theft deterent purposes. When you turn the key to the on position, not start if you hear the fuel pump running then the afm is malfunctioing. there should only be fuel as you start to crank. Let me have somemore details and i will get you back on the road. Also
need to knowif you recently did any repairs or maintenance recently? rx7doctor

DiabSoule

That was quick let me try to answer these. before it died lets see. I was haveing high Idle Probs. eventualli removed and cleaned the Throttle Body To no Avail. Car would still start at this point but still right a 1k rpm. tried to adjust the throttle stop screw and that seemed to work re-tuned everything up and had a nice smooth idle. came back out the next day to fire it up and nothing happened. Checked and cleaned plug rotated the motor afew time to get excess fuel out. Put them plugs back in and fired it up. Then it just stalled no matter how much gas i gave it and was a crappy idle at that. Proped the AFM open with a big screw Driver and started it up seemed to run but would not idle. Ran as long as i kept it at around 3k but still eventually died. As far as the Fuel cut switch this is something the previous owner had put in and apears to be a straight hard wire Job. As soon as i flip that switch i hear the pump whinning. Were is the main EGI fuseable link? Hope that helps alittle more

Rx-7Doctor

iTrader: (13)

The main egi fuse is located right near the battery one wire from the posistive side of the battery goes to this fuseable link connection. Well the fuel cutoff switch seems to be a mystery why it is in there, its part of a problem, you do not want fuel to start entering the system until you start cranking the motor. On carbs it's totally opposite. Could there be a loose connection at the air intake hose going to the t/body. There are 3 different places that can cause a major vacuum leak. The clamps can sometimes come loose where the hoses join together, also the hose that comes out of the air intake hose that attaches to the plenum. if this comes off their is a major vacuum leak. It does not sound like you have any type of ignition related problem, but either a vacuum leak, defective afm. If it ran for a period of time then died, you can check for spark immediately afterwards to verify if their is a problem in that area, but i dont think so. At that point of dying see if there is fuel still being delivered by pulling off the the inlet hose at the piping in the engine,
and turn the key to the on position and turn your fuel cutoff switch on. REmember you have to have correct fuel pressure and volume in order to keep the vehicle running. If after it dies there is no evidence of fuel then the pump is probably shot.
Keep me informed. rx7doctor

DiabSoule

I ahve never had a problem with this cutoff switch though. I just turn it on prior to cranking the motor and ensure that it was off before i leave the car. I will check for that fusable link i remember seeing a black wire right at the positive termanal next to the coil but i dont think it was comeing from the positive termanal. If that wire is not there were do i check for voltage on the E.C.U. For all i know all the wire could be hosed up. Yea i have had that air intake tubing off abit i will recheck it. It's a PITA to get that middle connection just right. maybe i will use some duct tap for trouble shooting purposes. LOL. I cant get it to start at all now. So im sure there is a problem somewere. i will get back with you tomorrow morning and let you know what i can come up with. Thanks again

Rx-7Doctor

iTrader: (13)

Their should be a wire from the positive battery terminal to the fusable link panel
their should be 3 fusable links there. Don't worry about the ecu at this time, lets check all the basics first. rx7doctor

DiabSoule

Well i found that fuse panel and i have 12v all the way down on both sides. So i guess that those are good. i also checked the AFM as per the Service manual. Everything check out except the Temp. Sensor it thinks its like 90 degrees. I made sure that i have spark on all 4 plugs and i do. What do you say there doctor

Rx-7Doctor

iTrader: (13)

If the coolant temp sensor is out of specs, it will tell the ecu to dump fuel. yhis usually fails at the point where it tells the ecu that the coolant temp is way below zero therfore trying to compensate for fuel. My motto always has been if a known part is out of specs as long as the connection is good and no breaks in the wiring, replace it.Then proceed with the next step if it does not start. If the plugs are getting that fouled then you will have to go thru the purge process again. Sometimes if you cut off the fuel to the system and put a booster charger on her for better cranking and keep your foot all the way down on the throttle you can
get her to start and just let it die to purge the fuel. let me know what you find.
rx7doctor

DiabSoule

Is not thet sensor I tested the air intake temp. sensor apart of the AFM im not sure how i could replace that specificly. I guess i should try the coolant temp sensor as well it can give this problem. What are the posibilities of going to a side draft Carb if i cant get this thing to run. Can i ByPass the Ecu and all or is it more of a PITA than what its worth.

DiabSoule

Do you have any other thoughts there Doctor. Is there a way to put the throttle body back into factory specs. I had that thing off awhile ago.