High Altitude Running
10-26-08, 10:07 PM
#1
The One Without
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High Altitude Running
OK so I am wondering how to adjust my RX-7 to run better at higher altitudes since it seems that it is running rich right now. Also can anyone tell me what 4 beeps that repeat themselves mean when you are driving?, I think it has something to do with shifting but I am not sure if anyone knows could you please clue me in?, thanks.
10-26-08, 10:57 PM
#2
Our 7s should compenstate for altitude. There is a barometer under the dash for just such reasons. Are you useing a AFR gauge to check that it is rich, or just smell gas? First guess is that one of the inectors is stuck. Having them cleaned is like $100 with shipping. Might be able to find a local shop near you but i kinda doubt it. Anyway, if its not the injectors, then a sensor probably off. You can check the codes.
http://fc3spro.com/TECH/HOWTO/ERRORC...KI/kerror.html
The beeps are probably power stering related. Check the FAQs at the top of the second gen forum.
So, you can help me with a question i was wondering about. Where do you have to go to get your emmisions tested? I cant beleive that they have one near the lake, or even in Trukee for that matter.
http://fc3spro.com/TECH/HOWTO/ERRORC...KI/kerror.html
The beeps are probably power stering related. Check the FAQs at the top of the second gen forum.
So, you can help me with a question i was wondering about. Where do you have to go to get your emmisions tested? I cant beleive that they have one near the lake, or even in Trukee for that matter.
10-27-08, 06:22 AM
#3
You really shouldn't need to make any special adjustments for altitude.
The RX seems to run "rich" by design but if all the stock settings are correct (timing, TPS, etc.) and all systems are functioning correctly (no stuck injectors or the like), the car will run fine at any altitude.
I live in Denver and just returned from a long trip which took me down to sea level and the car compensated without a hitch. Temps ranged from 85° in Chicago to high 20's (snow in Nebraska!) and fuel octanes changed- our regular in Colorado is 85, whereas everywhere else it was 87- but fuel mileage stayed consistent and performance seemed unchanged.
Fuel injection and computer control are wonderful things.
The RX seems to run "rich" by design but if all the stock settings are correct (timing, TPS, etc.) and all systems are functioning correctly (no stuck injectors or the like), the car will run fine at any altitude.
I live in Denver and just returned from a long trip which took me down to sea level and the car compensated without a hitch. Temps ranged from 85° in Chicago to high 20's (snow in Nebraska!) and fuel octanes changed- our regular in Colorado is 85, whereas everywhere else it was 87- but fuel mileage stayed consistent and performance seemed unchanged.
Fuel injection and computer control are wonderful things.
10-27-08, 07:11 AM
#4
I guess altitude is relitive. Sealevel in chicago is 500 feet 
Hell at low tide i can get below sealevel. Of course its not death valley......
I have gone from about 50 feet to about a mile up in two hours. As clockker said, if its working the way its supposed to then you wont notice a thing.
Take it over Mt rose to reno, that should give you a real good idea on how well it handles changes
Hell at low tide i can get below sealevel. Of course its not death valley......I have gone from about 50 feet to about a mile up in two hours. As clockker said, if its working the way its supposed to then you wont notice a thing.
Take it over Mt rose to reno, that should give you a real good idea on how well it handles changes
10-27-08, 10:11 AM
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On series four you have a ATP sensor mounted in the passengers side. ON series five the ATP is internal to the ECU.
If you have a RTEK 2.1, you can adjust the ATP to anything from sealevel to 8000 ft. And when you do, the fuel mixture is effected thoughout the full range.
Say your idling the car at a 700 ft altitude and have a RTEK and have a wideband . You can use the slider on the RTEK and move the altitude to sealevel, and I guarantee the afr on the wide band will get richer, just like it'll be richer throught the rpms. Or say your idling around at a site at 700 ft and you move the slider of the RTEK to 2000 ft. The afr will get plumb lean and might cause the engine to die.
In other words the ATP in either model works and you don't have to make any adjustments if you go into the mountains from sealevel. Just like the guys above said. Just repeating them.
If you have a RTEK 2.1, you can adjust the ATP to anything from sealevel to 8000 ft. And when you do, the fuel mixture is effected thoughout the full range.
Say your idling the car at a 700 ft altitude and have a RTEK and have a wideband . You can use the slider on the RTEK and move the altitude to sealevel, and I guarantee the afr on the wide band will get richer, just like it'll be richer throught the rpms. Or say your idling around at a site at 700 ft and you move the slider of the RTEK to 2000 ft. The afr will get plumb lean and might cause the engine to die.
In other words the ATP in either model works and you don't have to make any adjustments if you go into the mountains from sealevel. Just like the guys above said. Just repeating them.
10-27-08, 11:15 AM
#6
The One Without
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Ok.....?
Hailers you said on series four you have a ATP sensor mounted in the passengers side. ON series five the ATP is internal to the ECU.
If you have a RTEK 2.1, you can adjust the ATP to anything from Sea Level to 8000 ft. And when you do, the fuel mixture is effected throughout the full range.
OK so I have no idea what series I have all that I know is that it is a 1987 Mazda RX-7 GXL so I really have no idea what the series is. Also as for the ATP Sensor I most likely don't have one because I don't have a dash long story short the guy I bought it from ripped out the dash to get to the heater core and never bothered putting one back in.
As for the RTEK 2.1 is that something related to the ecu of the car?
AUGieDogie thanks for the trouble code links I will skim through those and find out what the problem is. As for a place to take your 7 for the emissions test. I take mine 7 over to Christensen Automotive their address and phone number are 2614 Sussex Ave South Lake Tahoe, CA 96150, (530) 544-9990. They do the smog and emissions tests for South Lake Tahoe I think I know they do smog not to sure about the emissions though. They can even do compression tests on 7's as well.
Thanks clokker I will check my hayne's for reference and then I will check out the fuel injectors.
If you have a RTEK 2.1, you can adjust the ATP to anything from Sea Level to 8000 ft. And when you do, the fuel mixture is effected throughout the full range.
OK so I have no idea what series I have all that I know is that it is a 1987 Mazda RX-7 GXL so I really have no idea what the series is. Also as for the ATP Sensor I most likely don't have one because I don't have a dash long story short the guy I bought it from ripped out the dash to get to the heater core and never bothered putting one back in.
As for the RTEK 2.1 is that something related to the ecu of the car?
AUGieDogie thanks for the trouble code links I will skim through those and find out what the problem is. As for a place to take your 7 for the emissions test. I take mine 7 over to Christensen Automotive their address and phone number are 2614 Sussex Ave South Lake Tahoe, CA 96150, (530) 544-9990. They do the smog and emissions tests for South Lake Tahoe I think I know they do smog not to sure about the emissions though. They can even do compression tests on 7's as well.
Thanks clokker I will check my hayne's for reference and then I will check out the fuel injectors.
Last edited by Dark_Knight; 10-27-08 at 11:25 AM.
10-27-08, 12:52 PM
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Rtek FAQ: https://www.rx7club.com/rtek-forum-168/rtek-faq-read-first-532320/
Read it.
Rtek to an ECU is what a mod chip is to an Xbox. It's an aftermarket modification. When you get it back, it's still a stock ECU, but.. with magical powers.
Not as awesome as a Haltech though. Definitely easier on the wallet though.
Read it.
Rtek to an ECU is what a mod chip is to an Xbox. It's an aftermarket modification. When you get it back, it's still a stock ECU, but.. with magical powers.
Not as awesome as a Haltech though. Definitely easier on the wallet though.
10-28-08, 12:42 AM
#9
The One Without
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OK so some people have commented to me that the RX-7 that I have is not a GXL but an SE. So I don't know if that makes a huge difference. BTW can anyone tell me the what SE stands for?, I am a noob sry.
Also I am not ready for the RTEK 2.1 maybe once I have the car pieced back together then I will get into digital tuning. But until then I have to work on getting it into one piece. Thanks for all of the help so far later.
Also I am not ready for the RTEK 2.1 maybe once I have the car pieced back together then I will get into digital tuning. But until then I have to work on getting it into one piece. Thanks for all of the help so far later.
10-28-08, 04:43 AM
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All series four have a external ATP. If you don't have one, then when you checked for fault codes, it would show up as *a ATP fault*.
Yeah. RTEK is an enhanced ECU made by Digital Tuning and we have a RTEK Forum on this site.
Yeah. RTEK is an enhanced ECU made by Digital Tuning and we have a RTEK Forum on this site.
10-30-08, 10:54 PM
#14
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OK this may just be me but I can't find the section in the FSM that refers to the trailing coil could someone please point it out to me please.
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