ok so i drive a 94 rx7 and it is throwing knock sensor and map sensor codes i was thinking about just replacing them both if so can anyone tell me how to replace them or just give me your thaughts on what i should do ? im trying to save money as wel so if you can help out with where i can get them cheap thatd help aswell...thanks alot

 

map sensor is EASY as hell to replace. 1 hose, 1 bolt, 1 connector. in plain view.

 

the car will run like complete *** if the map sensor is bad?

so, how is she running?

the knick sensor isn't that hard either, plus it's only like $40

 

Start with the connections first and inspect that. The sensors might not even be bad, it just may be that the ECU is not getting signal.

 

my cars idle is fubard... suspecting the map

 

its running ok i guess it drives around just fine but when i get on it it cuts out every now and then and stops reving up for likie 5 seconds and isnt hitting boost consistantly and where did you find a knock sensor for 40?

 

when my idle went wacky it started the random cut outs too. gl

 

anyone at all got any help as of where i can find the parts for cheaper then 200 for the knock and 375 for the map

 

Neither of those go bad all that often. +1 on checking connections first.
But you can try posting a WTB here----> https://www.rx7club.com/3rd-generation-rx-7-1993-2002-parts-99/

 

If I remember correctly, knock sensor was about $170 from Ray at Malloy 888.533.3400

As others have stated, start with the trouble shooting before you start "shotgunning" parts. That gets expensive quick and it still won't solve your problems...

Good luck.

Charlie

 

on my daily driver i got codes for a cam position sensor and a crank position sensor. So i payed 500 to get them both replaced, didnt fix anything and they just handed me my keys and i was in the same spot as before, i put it on a lift and spent about five min looking and found i had a broken wire going to my crank sensor. It was only a couple bucks and a couple minutes and i was back on the road. Lesson here is never just slap parts on, always diagnose. try not to prove what isnt working, prove what does work to help you diagnose. take a voltmeter make sure you have voltage to each sensor, check wiring diagrams maybe the sensors are connected somewhere ( like i had a cam sensor code when the wires to the crank sensor were bad ) make sure that your sensor is grounded properly maybe the bolt rattled loose and that is why it cuts out every once in a while, just go over the whole system to make sure everything else is okay, it will take time but it will save money

 

knock sensor rarely go bad, check your connectors. How many miles on the car? It could be a connectors or a dried up engine harness starting to give you all sorts of electrical sensor problems.