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help with 91 rx7 naturally aspirated plz.

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Old 05-29-09, 04:02 PM
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help with 91 rx7 naturally aspirated plz.

i have a 91 mazda rx7 n/a experiencing issues with gas mileage and loss of power.
we have already replaced fuel and air filters the 02 sensor spark plugs coils and cdi box.
Old 05-30-09, 10:08 AM
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Test the CLT sensor as per the FSM. If it checks out, have the injectors professionally cleaned.
Old 05-30-09, 09:02 PM
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Originally Posted by Aaron Cake
Test the CLT sensor as per the FSM. If it checks out, have the injectors professionally cleaned.
what are these ???/ plz any help is appreciated thx
Old 05-30-09, 09:12 PM
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Originally Posted by 91spitfire
what are these ???/ plz any help is appreciated thx
FSM = factory shop manuals- You can find them in the archive in the 2nd gen forum
Old 05-31-09, 09:59 AM
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The Factory Service Manual can be found in the FAQ For FC thread. It contains all this information and more, and is an essential tool for any sort of service work that needs to be performed on these cars.

Additionally, the Haynes service manual for the 1986 thru 1991 RX-7 (both turbo and NA) can be found at most local auto parts stores or purchased from any good bookstore (ISBN number 1 56392 007 7). 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.

CLT = Coolant Temp Sensor.
Old 05-31-09, 04:57 PM
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Originally Posted by Aaron Cake
The Factory Service Manual can be found in the FAQ For FC thread. It contains all this information and more, and is an essential tool for any sort of service work that needs to be performed on these cars.

Additionally, the Haynes service manual for the 1986 thru 1991 RX-7 (both turbo and NA) can be found at most local auto parts stores or purchased from any good bookstore (ISBN number 1 56392 007 7). 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.

CLT = Coolant Temp Sensor.
thx but i dont understand how the coolant temperature sensor would help regain all the power lost and get gas mileage back ??????? thx
Old 06-01-09, 09:12 AM
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You don't need to understand. Just do as I say.

Seriously, the CLT tells the ECU the temperature of the engine so it can decide how much to enrich the fuel mixture. If the CLT is reading cold, then the ECU will run the car very rich.

It may not be the cause, but it is something that needs to be checked before more expensive checks are made.
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