Mototoroto

Recently started having problems with the starter not cranking when turning the key, I would have power to the whole car as usual, turn the key, radio would go dark as usual (it's supposed to happen right?) and I would hear the fuel pump come on line but there would be no crank no click or anything. With a few more turns of the key it would finally come on line and fire up. It has gotten worse in the last few days and started not starting to crank at all when hot, regardless of how many key turns, I had to get a bump start to get me home today and had the same no turn over when hot when I tested it at home after the trip. Once it cools down it will start to crank (still after a few turns). I figured it was a bad starter or bad wiring to the starter and figured I'd get it looked at as soon as I could (it is my daily and I can't put it out of commission) but today on the way home I flipped my turn signal on, the radio died out, and the car started to stutter badly and lurch. This all happened as I was pulling up to my house so I shut it off as soon as I could. I came back out and did my usual key turn test and it sounded as though the fuel pump was stuttering or surging. It still refuses to crank. So the main question I'm asking is where could all of this be stemming from? What would cause my turn signal to kill my radio and fuel pump?

satch

iTrader: (1)

Poor grounding could be your issue. Also, does the car require you to press down on the clutch to start the car? If so, then an interlock switch could be causing that particular issue. It's possible it could be all caused by one single issue or perhaps at least two separate issues. And it is normal for the radio to not operate w/key to start, as the car cuts power to those components unnecessary in starting the car to focus the battery's power to cranking the starter.

welfare

if you don't hear a click from the solenoid, it's more than likely a control side issue, however the starter solenoid can be the culprit. cancel out ign. switch, as the radio dims. leaves clutch interlock, starter relay, starter solenoid. or wiring between them. i usually like to start with a bypass jump to the starter. this eliminates everything from the circuit but the starter, b+, and ground cables. if starter spins over with a bypass jump, next place i check is clutch interlock switch. as they are fairly common. you can test by looping the switch. if it cranks with the switch looped, switch is the culprit. if no go, remove the starter relay, put power and ground to the switched side while checking continuity across the load side

D2380

Hello guys am also having the same issue...changed starter, new battery, and also alternator , cleaned up the bolt and joint that's located under the hood on the chassis ..and nothing ..starts when she wants ..have a trigger so I connected B+ and the other to starter relay and started right up like the champ that she is...going to check on starter relay.. Thanks

welfare

^^if you hooked up a switch to the relay and it functions fine, the relay is fine. check your clutch interlock switch

Mototoroto

I don't think it's my interlock switch since I can hear my fuel pump when the clutch is depressed in but it doesn't when engaged trying to start. I wish I knew more about wiring I might as well be reading another language.

satch

iTrader: (1)

The interlock switch only deals w/the starter and has nothing to do w/the fuel pump.

Locate the starter cut relay. It has one plug w/4 wires. One of these wires is Black/White. Jumper voltage to it from the battery and the starter ought to engage (plug can be removed from the relay). Does yours?

If the starter turns over when doing the above then move on to the next step. Back at the starter relay plug check for voltage at the thicker of the two Black/Green wires in the plug when the clutch is depressed and the key is placed to start. If things were working properly the thick B/G wire would have close to 10 volts. If the wire has the proper voltage then jumper voltage from this thick B/G wire to the B/W wire in the same plug and try to normally start the car to see if the starter engages. If the B/G wire on the other hand does not register voltage w/the clutch depressed and key to start then the interlock switch is faulty or the ignition switch is not doing its job.

To test the interlock you would locate the plug running to it which has a B/G and a B/R wires. The B/R wire must have voltage w/key to start (clutch does not have to be depressed just the key placed to the start position). If it does not then the ignition switch is faulty or the ignition switch is not receiving voltage from the main fuse. If the B/G does have voltage w/key to start then the B/R wire in this switch must have voltage w/key to start and clutch depressed. If the B/R wire does not then the interlock is at fault.

D2380

Hello guys ordered this part ...received it 3 days later..installed it today and zoom zoom ..she has never had a quick crank and full power like this before...recommend this part....Starter Booster RX7 Add To Cart Dose your RX-7 experience occasional hit and miss starting? This is a common problem with RX-7's, caused by accumulated voltage drops on the starter circuit from the clutch/neutral switch and immobilizer relays. To eliminate this annoying behavior we developed our Starter Booster kit, this amazing little unit fires the starter with full battery voltage every try! Our complete kit has detailed instructions, is easily installed in 30 min. or less, and can be used on any vehicle experiencing this problem. Model No. PSB-FD3S-001

D2380

Pettit Racing.com.

clokker

iTrader: (2)

That strikes me kinda like the fuel pump kill switch mod- more of a "fix" than a repair.

Mototoroto

well ive come to learn that my alternator is shot. i jumped it the other day and it hit first turn so i must have been feeding low to the battery and it just killed it over time. very weird considering i never had a hard turn over when it did decide to hit in the past. so new alternator and battery and hopefully this will fix my problem.

welfare

judging by your first post, it's not a charging system issue

Mototoroto

im skeptical as well but it seemed to work when i used a different power source and my alternator WAS shot so if anything im fixing at least one problem. we will see when i get it replaced, if not then i need to tear in and try to figure out what how to do what these guys above have told me to do.

Nick_d_TII

iTrader: (6)

Maybe...
https://www.rx7club.com/2nd-generati...ystery-896013/

Mototoroto

Well the alternator and battery did fix it to where it will start, I've put a hundred or so miles on it. I guess I just drained the battery to the point of it failing from running the fuel pump and ignition(?) but I still have the sticky starter so that will be the next thing to address along with hot start gremlins.

D2380

Look into the Stater Booster ..that helped me with my Starter issue..one of the best investment I have done..don't have to worry if it will start or not..always a 110% start..

smikels

I have just went through a lot of these issues. I did the sticky starter wiring fix. I recently started having issues with the starter not disengaging. So I took the car in after push starting it since it would the car would not try to start or anything that morning. You turn the key and nothing. I had that issue right after i rebuilt the car a couple weeks ago as well and pulled the starter and attached jumper cables to it and tested it and it worked like it was supposed to or so I thought. Then I put it back in the car and it ended up starting the car. So anyways they pull the starter after saying yeah it seems like a starter issue. They open the starter up and everything is all rusted inside. So they replace some items and put it back on the car and it cranks right up. The starter cranks over so fast it is ridiculous and this is off the original wire that it is hooked up and not the bypass that I created trying to send more power to the starter. So all these issues were just the starter failing. I did not need to try and do the sticky starter rewire. Although that did turn the starter over a little faster when I did that modification.