Rtek Forum Discuss the Rtek 2.0 and other Rtek ECU's

Rtek timing question

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Old 07-19-07, 08:39 PM
  #1  
sideways!!

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timing question

is it ok if the trailing timing is in the negative. im running my timing conservatively and the split is about where its supposed to be.

the reason why i ask is ive been having a fair amount of hesitation under vacuum and very low boost. it feels like im riding a damn horse. it goes away when boost builds. anyone had this.
Old 07-19-07, 10:21 PM
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several of us are having the same problem:

https://www.rx7club.com/rtek-forum-168/looking-advice-668924/
https://www.rx7club.com/rtek-forum-168/2500-rpm-bucking-657502/
https://www.rx7club.com/rtek-forum-168/cant-drive-car-without-going-lean-667042/
Old 07-20-07, 04:40 PM
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sideways!!

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yeah, sounds like the same thing. this really started happening when i first put my rtek in, didnt do it when i had my ecu unchipped. whats happening to fix this? and more importantly what is causing this?

has it done it to anyone when taking off from a stop?
Old 07-20-07, 05:55 PM
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I have been pulling my hair out for months over a similar issue.
Old 07-20-07, 05:56 PM
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Can you post a log of the hesitation area?
Old 07-20-07, 07:20 PM
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wow not another one... im thinking about getting a stock injectors and another 1.7 and selling this 2.0
Old 07-20-07, 07:39 PM
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Originally Posted by boost_its_what_for_dinner
wow not another one... im thinking about getting a stock injectors and another 1.7 and selling this 2.0
I am going back to stock ECU, INj, and a FDC and see what happens.
Old 07-20-07, 07:48 PM
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well i dont have that stuff to fall back on i sold it,so keep me updated
Old 07-21-07, 11:39 AM
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yeah, if these issues dont get fixed, i might just go haltech or something else. makes my car sound like a piece of ****.
Old 07-21-07, 11:41 AM
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Originally Posted by The Wankler
Can you post a log of the hesitation area?
ill do that when i get a chance. it does it from the start to about 3500 rpm. it sounds like it cuts out and my car surges. only at light throttle too.
Old 07-21-07, 02:13 PM
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Originally Posted by mzrx7man
ill do that when i get a chance. it does it from the start to about 3500 rpm. it sounds like it cuts out and my car surges. only at light throttle too.

You have the "Transistion Stumble". Some of us others are experiencing a similar amongst ourselves, but different then yours. We are having a issiue in the 2-3k range.

I went back to stock, no luck guys., Once the car warmed up, smae problem. Tried both, Stock and RTEK. It was fine, UNTIL IT WARMED UP. Like some others are having once warm.

So, what about the "Water Thermo Sensor"? I do remember swaping mine out some time ago.

This seems to be a tempature issue for some.
Old 07-21-07, 05:30 PM
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temp plays a big role in mine too. i have my o2 unplugged and its running way better but when i plug it back in it goes back to being hesitant and stumble like.
Old 07-21-07, 08:28 PM
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well my problem seems to be exact opposite scenarios than you guys.. it gets WORSE with the o2 unplugged, and seems to happen more when COLD, although it happens when warmed up too

and i wouldnt blame rtek right away, as we are driving 20 year old cars.. as soon as i get mine up and running again, im have a new tps to swap on and then im going to try a different AFM
Old 07-21-07, 11:33 PM
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I have tried almost it all. OEM ECU, INJ, Ignition, FCD. I still have the problem.
Old 07-21-07, 11:47 PM
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I was thinking about buying a rtek7 2.0.

Now.... errrr..... I don't know....
Old 07-22-07, 12:55 AM
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Originally Posted by The Wankler
You have the "Transistion Stumble". Some of us others are experiencing a similar amongst ourselves, but different then yours. We are having a issiue in the 2-3k range.

I went back to stock, no luck guys., Once the car warmed up, smae problem. Tried both, Stock and RTEK. It was fine, UNTIL IT WARMED UP. Like some others are having once warm.

So, what about the "Water Thermo Sensor"? I do remember swaping mine out some time ago.

This seems to be a tempature issue for some.
i forgot to mention too that mine hesitates only when hot. it runs perfect when cold. so if you went back to stock and it didnt help it has to be the thermal sensor then? what else would change with temperature? has anyone replaced the thermal sensor? what about the one on the bottom of the radiator? mine is disconnected.
Old 07-22-07, 02:02 AM
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well mines all hooked up but has anyone unplugged the sensor on the back of the water pump housing?? that could be the culprit? as temp is the leading factor for all wether cold or hot
Old 07-22-07, 11:12 AM
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I will work on it today to see what happens. I will also hit the wrecker and pull a few sensors.

Sasser, the RTEK is a nice ECU, I would not let our threads discourage you. Our problem could be other then the RTEK. Heck, wait till the 2.1 comes out for that matter.
Old 07-22-07, 11:14 AM
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Originally Posted by mzrx7man
i forgot to mention too that mine hesitates only when hot. it runs perfect when cold. so if you went back to stock and it didnt help it has to be the thermal sensor then? what else would change with temperature? has anyone replaced the thermal sensor? what about the one on the bottom of the radiator? mine is disconnected.

THe one at the bootom of the Rad I believe is a cold start feature, or warm up. I think it hold the idle high for a few seconds till the water hits a cetain temp. Mine is coupled. I have a Koyo Rad and it did not come with the bung for that sensor.
Old 07-22-07, 02:38 PM
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i have a koyo and it has the bung for it.. atleast the radiator says koyo but it doesnt look like a real koyo its jdm crap prolly but it has the bungs. would unplugging that do anything. wheres the sensor for the temp. gauge?
Old 07-22-07, 02:54 PM
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Originally Posted by boost_its_what_for_dinner
i have a koyo and it has the bung for it.. atleast the radiator says koyo but it doesnt look like a real koyo its jdm crap prolly but it has the bungs. would unplugging that do anything. wheres the sensor for the temp. gauge?
No need to unplug it.

The factory temp gauge Sensor is on the drivers side block above the Trailling top plug.

Last edited by The Wankler; 07-22-07 at 02:59 PM.
Old 07-22-07, 07:07 PM
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The biggest problem:

is it a Rtek problem or a CAR problem.

If its Rtek problem what actions will they take. I can see it being a car problem...but its odd that NO one can figure it out.

All I know is something happens before the secondaries come on. Something critical at this point is suppose to happen or not happen.
Old 07-22-07, 07:09 PM
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Originally Posted by rogrx7
The biggest problem:

is it a Rtek problem or a CAR problem.

If its Rtek problem what actions will they take. I can see it being a car problem...but its odd that NO one can figure it out.

All I know is something happens before the secondaries come on. Something critical at this point is suppose to happen or not happen.
They are working on the Secondary Trasition stumble if not mistaken. I, and a couple others, are having a differnet isuue.
Old 07-22-07, 07:22 PM
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As far as I'm concerned, the hesitation at 3800 rpm is nothig BUT a car problem and nothing else. Period.

This hesitation below 3000 rpm *sounds* a lot like someone has removed fuel at that general range and has it so lean it *hesitates*. I never experience it at all so I can't say for sure ...since I don't have it. I sounds like more fuel needs to be ADDED at that particular range of rpms.

And I never bought into the RTEK suggestion to lower the transition point for the secondarys. Not a believer in that at all.
Old 07-22-07, 07:33 PM
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I do not have the transition problem.

It is a missfire/fuel/air type of problem. I have not chnged my fuel. And I have added, with no change. It is something wierd.


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