canonize-ryda

well i see these 2 plugs in my oil pan. one with what looks like a harness of wires and ones closest to the front off the car only with one wire and it not hooked up. is this bad and should i fix this? thank ahead

mazdaverx713b

iTrader: (91)

first, what year is your 7? TII or N/A? 12A or 13B? there should be two sensors in the oil pan for a non CA spec 7. the front sensor is a one wire sensor and its the oil level sensor. the rear sensor, still on the driver's side is an oil temperature sender used to operate the sub zero starting assist when oil temps are below 32 degrees. the drain plug is on the right side of the pan.

Aaron Cake

iTrader: (1)

The front is an oil temp sensor, used for cold stat purposes.

The rear is the oil level sensor.

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.

canonize-ryda

lost my repair man. sorry and its a 86 na and is that cold start one needed? and could that be why in colder weather my car dies once as soon as its started ,then runs just fine on a restart?

satch

iTrader: (1)

The cold start plug is not needed at all. Why your car initially stalls could be caused by a number of reasons. Perhaps it's because there isn't enough fuel being injected upon starting. Checking the water thermosensor would help to narrow down the problem.

Aaron Cake

iTrader: (1)

The cold start plug is used to actuate the ASV, if I recall correctly. But your car is stalling for another reason. Make sure that both the cold start thermowax/cam is operating, and that the BAC works.

canonize-ryda

easy way to tell if bac is working?

satch

iTrader: (1)

Have the car running at idle and place some load on the car such as headlights on, brakes depressed, fan on and then remove the plug off of the BAC and the idle should drop.

The FAQ in the 2nd generation section has links to the FSM.

canonize-ryda

my idle drops when i turn anything major. i take the bac valve plug off and nothing happens at all. does my bac need replaced? or can i repair it anyway. thanks

satch

iTrader: (1)

You need to have some load on the engine before removing the BAC plug. Have the A/C running and pull the plug and you should notice a difference as the car might stall.

You can also remove the plug and put 12 volts from the battery to the BAC terminal that the B/W wire goes to and a ground on the other terminal and the BAC itself should click and it's best to do this with the engine off. You can do this a few times to check the BAC and to loosen up the innerds if stuck. You must not get the wires providing the voltage and ground confused or especially touch both wires to one terminal of the BAC at the same time. Also, make sure the two wires coming into the plug aren't pulled back thus making a bad connection in the plug.