Help with tuning the upgraded Greddy T-19 Turbo
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Joined: Apr 2007
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From: VA Beach
the issue is when the dizzy signal spikes to "15k" the ecu revlimits and cuts fuel. shut off your revlimiter entirely and the bucking will probably turn into a less violent hiccup.
obviously thats not the best way to fix this though, lol
you didnt answer my question about the injectors...?
my problem only occured at specific PW's and rpm's, its possible that with the smaller wheel you never hit a PW that causes the issue. its also possible that in 1st you dont stay at that PW for enough cycles to cause a problem. i could rev out to 7k in any gear as long as i was at part throttle/partial boost. at full boost i would hit a specific PW/current load from the injectors and it would freak out. this was like 2 yrs ago so i dont have any logs to show you, sorry.
Btw I was running 470cc 323 GTR lo-z injectors when this problem occurred. i swapped out for some 360cc GTX hi-z injectors that I had and the problem was immediately gone. Later I stepped up to 550cc RX7 hi-z injectors, still no problems.
obviously thats not the best way to fix this though, lol
you didnt answer my question about the injectors...?
my problem only occured at specific PW's and rpm's, its possible that with the smaller wheel you never hit a PW that causes the issue. its also possible that in 1st you dont stay at that PW for enough cycles to cause a problem. i could rev out to 7k in any gear as long as i was at part throttle/partial boost. at full boost i would hit a specific PW/current load from the injectors and it would freak out. this was like 2 yrs ago so i dont have any logs to show you, sorry.
Btw I was running 470cc 323 GTR lo-z injectors when this problem occurred. i swapped out for some 360cc GTX hi-z injectors that I had and the problem was immediately gone. Later I stepped up to 550cc RX7 hi-z injectors, still no problems.
Sorry did not answer just did not understand how injectors could be the problem, now I see.
The injectors I have are out of a RX-7 460cc
I'm going for a drive to test the rev-limit theory.
Thanks
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Thread Starter
Joined: Apr 2007
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From: VA Beach
Just thinking and typing, the TP is not reading, so I pulled a data log from November track rental that had a pass logged.
I also thought the TPS on these cars was on and off only? Why did it only move once on this log from 7 volt to 8 volt?
Remember this log is from when it ran great!
I'm confused.
I also thought the TPS on these cars was on and off only? Why did it only move once on this log from 7 volt to 8 volt?
Remember this log is from when it ran great!
I'm confused.
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Thread Starter
Joined: Apr 2007
Posts: 2,010
Total Cats: 52
From: VA Beach
Patsmx5,
Injectors are high ohm injectors from a RX-7 460cc red top.
Grounds are to the back of the fuel rail area where that ground post is. That was what was recommend when I installed Brain's MS.
Samlo1,
Here ya go:
Don't know of it matters but the car still has 100 octane in it from track rental in November.
Injectors are high ohm injectors from a RX-7 460cc red top.
Grounds are to the back of the fuel rail area where that ground post is. That was what was recommend when I installed Brain's MS.
Samlo1,
Here ya go:
Don't know of it matters but the car still has 100 octane in it from track rental in November.
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Joined: Sep 2006
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You've got noise issues, which won't be solved by adjusting the settings. These manifest themselves differently in different logs; sometimes it's a reset, sometimes it's a RPM spike. You will need to get rid of the noise.
I'd start by inspecting the grounds. How is your Megasquirt wired up?
I'd start by inspecting the grounds. How is your Megasquirt wired up?
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Thread Starter
Joined: Apr 2007
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From: VA Beach
You've got noise issues, which won't be solved by adjusting the settings. These manifest themselves differently in different logs; sometimes it's a reset, sometimes it's a RPM spike. You will need to get rid of the noise.
I'd start by inspecting the grounds. How is your Megasquirt wired up?
I'd start by inspecting the grounds. How is your Megasquirt wired up?
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Grounds and noise, didn't I say that earlier? 
Hence why I asked about your grounding. You need to elaborate on it. Note exactly how every ground is ran. Then remove and clean every one, including the big ones, the ones on the PPF, the physical connections at the battery, etc.
Hence why I asked about your grounding. You need to elaborate on it. Note exactly how every ground is ran. Then remove and clean every one, including the big ones, the ones on the PPF, the physical connections at the battery, etc.
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Thread Starter
Joined: Apr 2007
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From: VA Beach
Grounds and noise, didn't I say that earlier? Hence why I asked about your grounding. You need to elaborate on it. Note exactly how every ground is ran. Then remove and clean every one, including the big ones, the ones on the PPF, the physical connections at the battery, etc.
Hence why I asked about your grounding. You need to elaborate on it. Note exactly how every ground is ran. Then remove and clean every one, including the big ones, the ones on the PPF, the physical connections at the battery, etc.Thanks
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Thread Starter
Joined: Apr 2007
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From: VA Beach
Well problem has been solved. And boy do I feel stupid!
Here goes, my car has been down since Nov as some of you knew and I have been working on the Lemons motor for the other car. So in doing the coolant reroute design I wanted to see how much room there was behind the head when the motor was in the car. So I unbolted the coil pack to see the room there, well I bet your guessing the rest.....REMEMBER TO TIGHTEN THE COIL PACK BOLTS!
Brain, should I put back the wheel setting I changed?
Back to tuning......THANKS ALL!
Here goes, my car has been down since Nov as some of you knew and I have been working on the Lemons motor for the other car. So in doing the coolant reroute design I wanted to see how much room there was behind the head when the motor was in the car. So I unbolted the coil pack to see the room there, well I bet your guessing the rest.....REMEMBER TO TIGHTEN THE COIL PACK BOLTS!
Brain, should I put back the wheel setting I changed?
Back to tuning......THANKS ALL!
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Thread Starter
Joined: Apr 2007
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From: VA Beach
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Well, you need to figure out what it was. Though it should be bolted down, it should not affect the performance of the coils. Perhaps you have a wire or connection back there that was being pushed on by the loose coil? I dunno, but I'd find out what's going on.
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