Enormous problem, bigger headache.
#1
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Thread Starter
Join Date: Dec 2008
Location: Hamilton, Ontario
Posts: 89
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Enormous problem, bigger headache.
93 Eunos Roadster(same as miata)
Manual Trans
1.6 Automatic 9:1 comp engine(stock)
MS1, using the recommended HR-10 hi res firmware
Using tunerstudio, but will use anything at this point.
Wells TPS mod, done as writeup shows....
t25 Sr20det redtop turbo unit
AEM xx-4100 wideband with guage
afm delete
GM AIT sensor, wired properly
F/P jumped properly.
90 RX7 NON TURBO Hi imp. 460cc injectors.
v mount IC setup, with surge tank, rad cap welded closed on rad
ms running as standalone(on its own)
Now, The issue is,
BTW, according to whom i bought my ms from, brain checked it all and made the harness, aswel.
https://www.miataturbo.net/showthrea...ght=megasquirt
The car LEAAAAANS out hardcore, idling. like 14...15.16.5......17....19....
over the span of maybe 10 secs.
What the **** is wrong?!?!?!! I cant figure this out. Im trying to get it so i caqn move the car at least. Ive had some handy folks have a look already, and one guy got itto idle by richening the ve fuel table up hardcore(like redic) so it stays around 14ish, but it goes up and down.(13-15.5)
Ive tried everything. basemaps, none have worked, at all.
Someone Please help me!
(ps, ive combined my threads into one lovely condensed "my car is fucked"thread. )
Anyone?
Manual Trans
1.6 Automatic 9:1 comp engine(stock)
MS1, using the recommended HR-10 hi res firmware
Using tunerstudio, but will use anything at this point.
Wells TPS mod, done as writeup shows....
t25 Sr20det redtop turbo unit
AEM xx-4100 wideband with guage
afm delete
GM AIT sensor, wired properly
F/P jumped properly.
90 RX7 NON TURBO Hi imp. 460cc injectors.
v mount IC setup, with surge tank, rad cap welded closed on rad
ms running as standalone(on its own)
Now, The issue is,
BTW, according to whom i bought my ms from, brain checked it all and made the harness, aswel.
https://www.miataturbo.net/showthrea...ght=megasquirt
The car LEAAAAANS out hardcore, idling. like 14...15.16.5......17....19....
over the span of maybe 10 secs.
What the **** is wrong?!?!?!! I cant figure this out. Im trying to get it so i caqn move the car at least. Ive had some handy folks have a look already, and one guy got itto idle by richening the ve fuel table up hardcore(like redic) so it stays around 14ish, but it goes up and down.(13-15.5)
Ive tried everything. basemaps, none have worked, at all.
Someone Please help me!
(ps, ive combined my threads into one lovely condensed "my car is fucked"thread. )
Anyone?
#3
Junior Member
Thread Starter
Join Date: Dec 2008
Location: Hamilton, Ontario
Posts: 89
Total Cats: 0
I should split the grounds for the wideband? I have the ground tied into the ground wire in the harness that goes to the ecu.
So in other words
ground aem to floor
ground aem to harness
ground to ecu(in harness ground to ecu)
So in other words
ground aem to floor
ground aem to harness
ground to ecu(in harness ground to ecu)
#6
Here was my msq. 1.6, stock, 2560R, fmic, stock coils, ~440cc injectors, high imp, still had the fan switched by the stock sender on front of head, stock fuel pressure/pressure regulator, 93 octane, 1.6 IAC. It idled well, fairly conservative timing map iirc, ran a little fat on the big end. Probably could have used a little cold start tuning.
This msq should work to at least get you started, etc. Common disclaimers apply, I am not responsible for you blowing up your engine, etc. You probably shouldn't get into much boost without some tuning.
I would wonder about your wbo2 indicating that lean condition, because mine starts at stoic then climbs to 20+ without exhaust running past it. Did you calibrate it, etc? Is this the same way it behaves without the engine running?
This msq should work to at least get you started, etc. Common disclaimers apply, I am not responsible for you blowing up your engine, etc. You probably shouldn't get into much boost without some tuning.
I would wonder about your wbo2 indicating that lean condition, because mine starts at stoic then climbs to 20+ without exhaust running past it. Did you calibrate it, etc? Is this the same way it behaves without the engine running?
#7
Also, what do your cold start/afterstart enrich look like? Maybe the map is really lean, and it's only at stoic when it first starts because it's in cold/after start, then once it gets out of cold/after, it leans out as per the map. When you try to richen it up, does it stink like rich/shoot soot out of the exhaust?
I don't think the ground alone would cause it to indicate so funky, that would just give you the usual non-matching wbo2 gauge v MS logging numbers.
I don't think the ground alone would cause it to indicate so funky, that would just give you the usual non-matching wbo2 gauge v MS logging numbers.
#8
One more thing. I think in the exhaust constants menu make sure your gego or whatever the closed loop wbo2 settings are called, you set the lower rpm limit to above your idle speed, or the MS will attempt to adjust mixture based on o2 feedback, and it can lead to some instability. You should at least have this in open loop while you are still twiddling with the base map, and put it in closed loop if you want if/when your idle mixture is stable and idle is solid.
#9
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Thread Starter
Join Date: Dec 2008
Location: Hamilton, Ontario
Posts: 89
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so these are the issues
the car starts and runs once it is out of the afterstart enrichment it starts to lean out
Ive maxxed out the ve table in the area of where it idles to get it to idle beyond 30 secs but it is very irregular afrs are bouncing all over seems to cycle every 10 seconds lean then rich
ive tryed disabling the autotune function it makes no difference
I got the timing setup properly i used a timing light and got it dead on, did it by adjusting the fixed angle
so it idles rough and its searching, tryed unplugging the Bac/Iacv samething i cannot get a smooth idle out of it
a light blip on the gas results in fuel cut dead lean but will stumble back to an idle i tryed to use the accel enrichment function but it made almost no difference even maxed out
at this point i'm thinking the unit is cooked, bad fuel pump, bad injectors or a wiring gremlin
ive played around with the req fuel setting i had it up to 12-14 then i could make the map look kinda normal but it would run the same way
the data logs are attached
(this is Tracktestedmiatas friend)
the car starts and runs once it is out of the afterstart enrichment it starts to lean out
Ive maxxed out the ve table in the area of where it idles to get it to idle beyond 30 secs but it is very irregular afrs are bouncing all over seems to cycle every 10 seconds lean then rich
ive tryed disabling the autotune function it makes no difference
I got the timing setup properly i used a timing light and got it dead on, did it by adjusting the fixed angle
so it idles rough and its searching, tryed unplugging the Bac/Iacv samething i cannot get a smooth idle out of it
a light blip on the gas results in fuel cut dead lean but will stumble back to an idle i tryed to use the accel enrichment function but it made almost no difference even maxed out
at this point i'm thinking the unit is cooked, bad fuel pump, bad injectors or a wiring gremlin
ive played around with the req fuel setting i had it up to 12-14 then i could make the map look kinda normal but it would run the same way
the data logs are attached
(this is Tracktestedmiatas friend)
#15
Dude, what?
Forget about the tps for now. What is the deal with your spark angle flatlining? In megatune, open your msq and click on spark, then spark settings, and make sure your fixed angle is -10. If it's not -10 the ms will not use your spark map, it'll just provide fixed timing at whatever number you provide there. I thought you said you set base timing. I almost guarantee you didn't do that correctly.
Hey, and did you even try my msq? I'd bet you'd get a runner with that one. I have the desire to help you and berate you at the same time. I will interject my next post to you with belittlement.
Forget about the tps for now. What is the deal with your spark angle flatlining? In megatune, open your msq and click on spark, then spark settings, and make sure your fixed angle is -10. If it's not -10 the ms will not use your spark map, it'll just provide fixed timing at whatever number you provide there. I thought you said you set base timing. I almost guarantee you didn't do that correctly.
Hey, and did you even try my msq? I'd bet you'd get a runner with that one. I have the desire to help you and berate you at the same time. I will interject my next post to you with belittlement.
#16
Correct me if I'm wrong here, but wasn't there something funky about the 93 miata's and its fuel or ignition? I wanna say it was the california cars had something different than the other cars. Maybe this applies to his also. There's a mod that has to be done to the 93 ms's to get them to work.
#17
Here's the 93 and MS thread:
https://www.miataturbo.net/megasquirt-18/warning-before-you-add-ms-your-93-miata-32367/
https://www.miataturbo.net/megasquirt-18/warning-before-you-add-ms-your-93-miata-32367/
#19
Go through the steps and explain how you set the base timing. Did you select fixed timing and then adjust the CAS? Did you leave CAS alone and tweak spark angle? CAS could be bad if no advance is ocurring after you set MS to use spark map.
For clarity, My fixed angle is 10 degrees, not -10 in tunerstudio. Then I adjust the CAS until my timing mark lines up with the number 10.
Alternately, you can adjust the spark angle in tunerstudio instead of moving the CAS.
For clarity, My fixed angle is 10 degrees, not -10 in tunerstudio. Then I adjust the CAS until my timing mark lines up with the number 10.
Alternately, you can adjust the spark angle in tunerstudio instead of moving the CAS.
#20
^Funny thing is, in his msq the fixed angle is at -10, so the MS SHOULD be responding based on the spark map, and not at a fixed angle.
You forgot to mention that you have to set the fixed angle back to -10 after you set the base timing, otherwise it will be "fixed" at +10, or whatever you set with the CAS.
You forgot to mention that you have to set the fixed angle back to -10 after you set the base timing, otherwise it will be "fixed" at +10, or whatever you set with the CAS.