Some help me got a 1979 mazda rx7
06-14-16, 10:24 AM
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Some help me got a 1979 mazda rx7
Got a 1979 mazda rx7 it doesn't crank I've had the starter look at it and it's good I'm not going to lie I'm not a car person I wanted to check the solenoid but I don't know where it's located on the engine the engine will turn over but it just won't crank I'm thinking it's got electric problems somebody please help me thank you for your time
06-18-16, 10:39 AM
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I interpret this to mean that you can spin the engine by hand, but it will not crank with the starter.
You will find the starter on the left side of the engine at the bottom rear, mounted to the transmission bellhousing. It will look like a cylinder, with another cylinder sticking out of it. That smaller cylinder is the solenoid.
Quite often all they need are a few taps from a mallet to unstick them. Give it a few whacks, try to crank the car, repeat.
If that doesn't do it, it could be mechanical or electrical.
Use a meter to check for 12V at the big connection with thick cable. That's the feed from the battery. If good, then check the small connection on the solenoid with the spade connector (white connector, black wire). Should have 12V when the key is set to "start". If so, then the starter is the problem.
If not, then it's electrical. Could be the key switch. Can test by jumpering the lead.
The Factory Service Manuals for all years of RX-7 (and many other rotary cars) can be downloaded for free here: Foxed.ca - Mazda RX-7 Manuals . They contain all common service information and more, and are an essential tool for any sort of service work that needs to be performed on these cars.
Additionally, the Haynes service manual for the RX-7 can be purchased at most auto parts stores or online. It is only about $25 and is a great quick reference for things like this. Not only does it contain most of the information in the FSM condensed into an easy to read format, but it includes full wiring diagrams as well.
These manuals will answer 99% of service related questions for the car and if you intend to do your own repair work, you will need at least one of them. Preferably both, since the FSM is a free download. The Haynes is a good quick reference covering 99% of questions, while the FSMs show complete and detailed procedures.
You will find the starter on the left side of the engine at the bottom rear, mounted to the transmission bellhousing. It will look like a cylinder, with another cylinder sticking out of it. That smaller cylinder is the solenoid.
Quite often all they need are a few taps from a mallet to unstick them. Give it a few whacks, try to crank the car, repeat.
If that doesn't do it, it could be mechanical or electrical.
Use a meter to check for 12V at the big connection with thick cable. That's the feed from the battery. If good, then check the small connection on the solenoid with the spade connector (white connector, black wire). Should have 12V when the key is set to "start". If so, then the starter is the problem.
If not, then it's electrical. Could be the key switch. Can test by jumpering the lead.
The Factory Service Manuals for all years of RX-7 (and many other rotary cars) can be downloaded for free here: Foxed.ca - Mazda RX-7 Manuals . They contain all common service information and more, and are an essential tool for any sort of service work that needs to be performed on these cars.
Additionally, the Haynes service manual for the RX-7 can be purchased at most auto parts stores or online. It is only about $25 and is a great quick reference for things like this. Not only does it contain most of the information in the FSM condensed into an easy to read format, but it includes full wiring diagrams as well.
These manuals will answer 99% of service related questions for the car and if you intend to do your own repair work, you will need at least one of them. Preferably both, since the FSM is a free download. The Haynes is a good quick reference covering 99% of questions, while the FSMs show complete and detailed procedures.
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Christopher Jimenez (05-30-18)
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