I have a MS I 3.0 running 440's low's on a 95 ford probe 2.0 I have gotten it to start several times, but every time I start it it back fires and runs way too rich. I has back fired so bad that it blew the guts out of my cat! I have tried to turn down the fuel in VE 1 to all 25 % and even turned the Req fuel from 7.6 to 1.0 !!! And still it backfires and runs rich. The O2 reading is eratic, It jumps from lean to rich. The car will not stay running, so I have to modulate the throttle to keep it running.
MY PWM is 30% is this right for lows and a 3.0 MS???
Please Help...
HELP!! Pig rich and I can't lean it out!
Forum rules
Forum rules
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
Forum rules
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
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Bernard Fife
- Super Squirter
- Posts: 1009
- Joined: Mon Feb 16, 2004 3:15 pm
I have gotten it to run a little better, the O2 is still eratic I have the fuel set the correct setting of 7.6 Req fuel. But when I go to autotune it gives me a message like, autotune out of tuning area... . What need to be changed so I can run autotune.
Also, I have the stock ignition until I have a handle on the fuel.
I am running MSnSE with 29q2
Has anyone ever had a problem with there drivers going wacky with the battery charger hooked up while starting, and then working fine with it taken off? I am just checking to see if I am losing my mind, or if it is a coincidence??
Also, I have the stock ignition until I have a handle on the fuel.
I am running MSnSE with 29q2
Has anyone ever had a problem with there drivers going wacky with the battery charger hooked up while starting, and then working fine with it taken off? I am just checking to see if I am losing my mind, or if it is a coincidence??
PLEASE HELP!!!
I have tried again today to no avial! This sucks... I have tuned an Apexi before and it was super easy!
Today I ran it with 4.5 Req. fuel with the VE turned to 4-5% in the bins that I was using, and it did not back fire but two or three times. But what I don't get is that the fuel calculator gives me 7.6 Req. fuel and I have turned way down and still the 02 bounces off of 15:1-19:1 and the thing is back firing and caughing. When I hit the accelerator the engine does not respond, so I have to hold it down for a while just to get it to rev.
I am still getting that error in autotune that it is outside the window. I do not see why. The green dot for autotune is right inside the VE bins.
This MS is pissing me off...
Here is my latest LOG. Will someone please respond to my problem?
Today I ran it with 4.5 Req. fuel with the VE turned to 4-5% in the bins that I was using, and it did not back fire but two or three times. But what I don't get is that the fuel calculator gives me 7.6 Req. fuel and I have turned way down and still the 02 bounces off of 15:1-19:1 and the thing is back firing and caughing. When I hit the accelerator the engine does not respond, so I have to hold it down for a while just to get it to rev.
I am still getting that error in autotune that it is outside the window. I do not see why. The green dot for autotune is right inside the VE bins.
This MS is pissing me off...
Here is my latest LOG. Will someone please respond to my problem?
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Bernard Fife
- Super Squirter
- Posts: 1009
- Joined: Mon Feb 16, 2004 3:15 pm
FSTurbo,
You should NOT uses a battery charger while cranking, this results in an incredibly noisy power supply to MegaSquirt.
You are not resetting, however, which is good.
You are showing a LOT of accel events, and this is messing up your pulse widths. They jump from 1.8 to 4.8 and back, which will make it impossible to tune. That's why the mixture is so rich.
To fix this, you need to increase the accel thresholds (MAPdot threshold and/or TPSdot threshold). Try at least 100 kPa/sec or 25%/sec or even much higher (double, for example). Set the decel fuel amount to 100% (meaning no cut) until you get the idle sorted.
Also, turn off the EGO correction at idle (set 'EGO active above RPM' to > 1800) until you get this sorted. That will let the changes you make actually have an effect.
Once you reset the above, you will probably have to return to your original req_fuel value.
When tuning the idle, warm the engine up then tune the VE table around idle to make the MAP kPa as low as you can get it.
Your posts fall under #2 here: http://www.msefi.com/viewtopic.php?t=16456, most of this info is here: http://www.megamanual.com/v22manual/mtune.htm, which may be why people were slow to respond.
Lance.
You should NOT uses a battery charger while cranking, this results in an incredibly noisy power supply to MegaSquirt.
You are not resetting, however, which is good.
You are showing a LOT of accel events, and this is messing up your pulse widths. They jump from 1.8 to 4.8 and back, which will make it impossible to tune. That's why the mixture is so rich.
To fix this, you need to increase the accel thresholds (MAPdot threshold and/or TPSdot threshold). Try at least 100 kPa/sec or 25%/sec or even much higher (double, for example). Set the decel fuel amount to 100% (meaning no cut) until you get the idle sorted.
Also, turn off the EGO correction at idle (set 'EGO active above RPM' to > 1800) until you get this sorted. That will let the changes you make actually have an effect.
Once you reset the above, you will probably have to return to your original req_fuel value.
When tuning the idle, warm the engine up then tune the VE table around idle to make the MAP kPa as low as you can get it.
Your posts fall under #2 here: http://www.msefi.com/viewtopic.php?t=16456, most of this info is here: http://www.megamanual.com/v22manual/mtune.htm, which may be why people were slow to respond.
Lance.
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Mike Braddock
- MegaSquirt Newbie
- Posts: 10
- Joined: Sun May 21, 2006 10:11 am
- Location: FL
FS,
Not to sounds terse, but most of your questions are answered in the excellent technical documentation that has been written for installing and tuning the MS EFI and is available for download on the main part of this site (Lance linked to it). It is intended to guide new users (like you and me) through these basic questions and teach us a logical order in which to proceed. It appears you either have either not read the manuals or need to review them since you don't understand the basics about idle tuning, warmup enrichment, EGO closed-loop control or Autotune. Again, I am not trying to be rude, but you're asking everyone to tell you the SAME information that is listed here in several places. Please take some time to read this info first and then ask questions about what you don't understand. If you can't read directions, then you should probably pay someone to do the tuning for you so you don't become so frustrated. Or return to the Apexi system with which you claim to understand better. By the way, why are you using 440 cc/min injectors on your Probe? What is your target HP goal?
Mike
Not to sounds terse, but most of your questions are answered in the excellent technical documentation that has been written for installing and tuning the MS EFI and is available for download on the main part of this site (Lance linked to it). It is intended to guide new users (like you and me) through these basic questions and teach us a logical order in which to proceed. It appears you either have either not read the manuals or need to review them since you don't understand the basics about idle tuning, warmup enrichment, EGO closed-loop control or Autotune. Again, I am not trying to be rude, but you're asking everyone to tell you the SAME information that is listed here in several places. Please take some time to read this info first and then ask questions about what you don't understand. If you can't read directions, then you should probably pay someone to do the tuning for you so you don't become so frustrated. Or return to the Apexi system with which you claim to understand better. By the way, why are you using 440 cc/min injectors on your Probe? What is your target HP goal?
Mike
I did what you said in regards to turning the accell enrichments off, and the o2 to not active below 2000, (I set it to 3000 for right now).
I got the car to run only a small amount better, but it still on occasion it backfires and I CANNOT get the mixture down.
Today, I put new plugs in it (Old one were covered in black soot) started it, after it died multiple times (while trying to adjust the warmup wizard to keep it running). I got the engine up to temperature (160-170 F) I began to try to lean it out. First I put all the bins I was currently using to between 10-20%. I then started adjusting the req. fuel, starting at 7.6 until I got to 1.5 Req. Fuel. It was still running rich, and was so rich that the O2 was reading 19.4:1
Here are what I set them too:
EGO active above 3000 RPM, 160 F
MS KPa/s
Accel enrichment: 1 300
2 300
2.9 300
3.9 300
Map dot threshold 0.0
Accel time 0.2
Decel fuel amount% 100
Cold accel mult% 150
Thanks for the help, JS
In response to the nice person who was giving advice, you make to many asumptions about what I know, and have read.
I got the car to run only a small amount better, but it still on occasion it backfires and I CANNOT get the mixture down.
Today, I put new plugs in it (Old one were covered in black soot) started it, after it died multiple times (while trying to adjust the warmup wizard to keep it running). I got the engine up to temperature (160-170 F) I began to try to lean it out. First I put all the bins I was currently using to between 10-20%. I then started adjusting the req. fuel, starting at 7.6 until I got to 1.5 Req. Fuel. It was still running rich, and was so rich that the O2 was reading 19.4:1
Here are what I set them too:
EGO active above 3000 RPM, 160 F
MS KPa/s
Accel enrichment: 1 300
2 300
2.9 300
3.9 300
Map dot threshold 0.0
Accel time 0.2
Decel fuel amount% 100
Cold accel mult% 150
Thanks for the help, JS
In response to the nice person who was giving advice, you make to many asumptions about what I know, and have read.
After thinking about my last tune. I think I might be running it too lean. Because a backfire generally means that there is a lean condition. I know from what I have read that if you go to rich it will show lean on the o2. I assumed this is my problem because I could smell the richness of the exhaust. But I assume this rich smelling exhaust was the effect of the VE Table having some rich areas??
Any thoughts on my hypothisis
Any thoughts on my hypothisis
