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-   -   S5 swap won't rev and has no power (https://www.nopistons.com/2nd-generation-specific-17/s5-swap-wont-rev-has-no-power-75672/)

kindahusky 07-16-2011 10:55 PM

Also does anyone know if there's a way to test/meter a CAS to make sure it's within spec?

RicerJ 07-17-2011 04:25 AM

http://fc3spro.com/TECH/FAQ/ecutype.html for ecu numbers and yes you can test the CAS with a volt meter as far as the specs are i cant tell you off the top of my head id have to look or you might find it in the fsm

RX-7racer 07-18-2011 10:07 AM

try replacing the water temp sensor on the back of the water pump housing. when i first got my car it ran like ****, we replaced the CAS, injectors, MAF, pressure sensor, TPS, re did grounds fixed wiring and it still ran like ****, basically as if the timing was off. aslo it only did it when the car was warmed up. someone told us to replace that sensor and it cleaned up immediately. so it was just a bad sensor. i dont know why that sensor caused it to run like **** but after replacing it the problem was fixed

kindahusky 07-18-2011 02:30 PM


Originally Posted by RX-7racer (Post 849354)
try replacing the water temp sensor on the back of the water pump housing. when i first got my car it ran like ****, we replaced the CAS, injectors, MAF, pressure sensor, TPS, re did grounds fixed wiring and it still ran like ****, basically as if the timing was off. aslo it only did it when the car was warmed up. someone told us to replace that sensor and it cleaned up immediately. so it was just a bad sensor. i dont know why that sensor caused it to run like **** but after replacing it the problem was fixed



thanks for the reply, I had wondered about this as well. I'll try this along with re-timing the car.



Are there any aftermarket gauges that will read from the stock sensor or that are more accurate than the factory or should I just use a aftermarket guage and sensor alongside the oem?

RicerJ 07-18-2011 03:10 PM

just run a aftermarket gauge and remember always run oem t-stats

RX-7racer 07-18-2011 11:12 PM


Originally Posted by kindahusky (Post 849356)
thanks for the reply, I had wondered about this as well. I'll try this along with re-timing the car.



Are there any aftermarket gauges that will read from the stock sensor or that are more accurate than the factory or should I just use a aftermarket guage and sensor alongside the oem?

i dont know of any aftermarket gauges that will work with the stock sensor. there may be some but using an aftermarket gauge with its own sensor would be the simplest route. there are many aftermarket gauges that you can run with their own sending unit, they all will be much more accurate than the stock gauge. all you would need to do is find a place to mount the sending unit (by either drilling and tapping a hole, buying an adapter that requires cutting the water hose, or theres other options) you can run the aftermarket gauge along with the stock one, each using there own respective sending unit.

kindahusky 07-21-2011 08:56 AM

woot reset the timing and did the sensor grounding from aaroncake's site and now the car runs like normal......but my front cover is leaking oil. I'm sick of working on this thing. Classes start in 3 weeks and I need a ride for school that I don't need to sink any more money into. If anybody wants a S5 swapped rx7 in the OKC area shoot me an offer or trade

RicerJ 07-21-2011 05:26 PM

i think the front cover has a seal replace that and you should be fine

mazdaspeed7 07-22-2011 08:21 AM

Lose the walbro! It flows too much for the stock FPR, raising your fuel pressure, and dumping extra fuel on an engine that runs too rich in factory trim. Sell the walbro, drop in a stock n/a fuel pump.



The front cover gasket is an easy fix. Just read the instructions carefully do you dont drop the thrust bearing when you pull the front pulley hub.


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