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Old 11-08-2008, 08:44 PM   #1
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Default Third week of MS troubleshooting

I got the car started and it idled! WOW. but after a few mins and it decided to die. Its running VERY rich, here is a log can someone help me out?
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Old 11-08-2008, 09:00 PM   #2
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Post all the info about your car. I don't know what year, what engine, what type of MS, etc. I'm clueless. From the datalog your TPS sensor needs calibrating and you're running really rich.
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Old 11-08-2008, 09:22 PM   #3
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Stock 1994 running a parallel MS1 using the 9495 PNP Base map.
I have NOT set my timing as im having loads of trouble with it. When i keep the car alive at 1k rpm, my timing light says im right at TDC (Not near the factory 10 bracket/plate) . As i adjust the timing on the MS it seems to be working the other way around, the closer it gets to the right setting (10) the worse the engine is running. I really hope i can get this thing sorted out, my turbo kit has been sitting patiently for about a month now.
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Old 11-08-2008, 09:37 PM   #4
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Calibrate your TPS. I'd tell you how to do it, but it's probably different since I have MS2 not MS1. But do this.

You have to get base timing correct. I'm no expert with MS1 though. I know you can turn the CAS to adjust it, so do that to get it to 10* BTDC with the timing light sensor clamped on cylinder 1. (the front most one).

And post your MSQ if you can figure out how. Don't tell me what MSQ your running, and don't link me to where you got it. I already know. Actually POST the one you have on your megasquirt. This way people can go through it and make sure everything looks right. I downloaded the **** to read MS1 just to help people like you.

Are ALL the guages in megatune working? Name the ones that are/are not.

And don't answer half my questions. Don't make me ask 3 more times, etc.
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Old 11-08-2008, 10:08 PM   #5
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TPS has been calibrated and base timing has been set, the car now idles on its own!

Every gauge in megatune is working (RPM, Coolant, pulse, duty cycle, MAP, Air temp, AFR and spark advance) . The AFR gauge is working and reading the same with my gauge but it always highlighted in red, i think this is because im running to rich.

Including a log file of the car idling and the MSQ straight from the MS.

Thank you Pat for all the help!
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Third week of MS troubleshooting-gauges.jpg  
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File Type: xls ITRUNS.xls (59.1 KB, 45 views)
File Type: msq current.msq (35.1 KB, 51 views)
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Old 11-08-2008, 10:24 PM   #6
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Cool. What type of O2 sensor are you running? Have you setup Megatune and Megasquirt for it? Have you calibrated it recently? I doubt it would even run at 7:1 AFR...
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Old 11-08-2008, 10:31 PM   #7
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I am using an LC1 which has be calibrated about a month ago when i first started installing my MS. I have set ms to default lc1 0-.5v and only set the "EGO" to wideband without changing anything else. When i have my stock ecu with no 02 input going to it, the gauge reads 12.5-13 at idle.
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Old 11-08-2008, 10:43 PM   #8
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holy hell, look at the PW and DC, lower your fuel map a ton
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Old 11-08-2008, 10:50 PM   #9
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Originally Posted by bryantaylor View Post
holy hell, look at the PW and DC, lower your fuel map a ton
Wouldnt you think the PNP map should have everything preset to make it run normal? I do not want to "tune" around a problem, but if nothing else works out, i will have to do that.
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Old 11-08-2008, 11:04 PM   #10
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Yeah don't touch the fuel map yet. If it's running "fine" then odds are it is, and the gauge i megatune is just lying. Like I said it wouldn't run at 7:1. You have go into MS configurator and tell it what type of wideband you have. Have you done this? And LC-1's are finiky. Did you wire it up EXACTLY as the directions specified, or did you do what you thought would work? Gotta follow them to the "T" or it won't work right.

Drive it and make a nice long log and post it up.
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Old 11-08-2008, 11:08 PM   #11
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It smells REAL rich. and yes, i have wires going all over the place just to get to the proper ground spots. why would it read low on the MS but read 12.5-13 on a stock ecu at idle?
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Old 11-08-2008, 11:17 PM   #12
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What reads rich on a stock ecu? The gauge in megatune or your gauge for your wideband?

Also, you can go into megatune and at the top click "basic settings">"engine constants 1" and look at your "req fuel" try making that number smaller. IE-if it's 12, make it 11 and see what the wideband reads.
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Old 11-08-2008, 11:31 PM   #13
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Quote:
Originally Posted by patsmx5 View Post
What reads rich on a stock ecu? The gauge in megatune or your gauge for your wideband?

Also, you can go into megatune and at the top click "basic settings">"engine constants 1" and look at your "req fuel" try making that number smaller. IE-if it's 12, make it 11 and see what the wideband reads.
on stock ecu, its the gauge for the wideband, not in MS. Adjusting the require fuel amount does have an effect. im able to get it to about 7.9 afr at about "8" required fuel but when i go lower it goes to 9>10>11>15>22.4 and dies off really fast.
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Old 11-08-2008, 11:35 PM   #14
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I'm gonna guess you need to recalibrate your wideband. It would be the next step if I were you. Try letting the car sit overnight and then recalibrate it in the morning before cranking the engine. Most agree letting is sit long enough will make sure it's "free air" enough in the exhaust pipe. Or remove the sensor and then do it.

If you're lucky some of the MS1 people will chime in and help. There may be some simple common thing you need to do that specific to MS1 I don't know of.
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Old 11-08-2008, 11:40 PM   #15
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Will try that. Just 1 more thing, my MAP reading with the key on without the engine on is at 94, 100 kpa = 14psi, something isnt making sense to me.
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Old 11-09-2008, 03:29 AM   #16
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It is your wideband for 100% sure, Mine did this last week I starterd it and it read 7.8 afr and the car was fine just needed recalibrated

PS: kpa is 97 with key off for me, so it doesn't mean 14 psi
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Old 11-09-2008, 03:35 AM   #17
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Originally Posted by turbobluemiata View Post
It is your wideband for 100% sure, Mine did this last week I starterd it and it read 7.8 afr and the car was fine just needed recalibrated
Lets hope so, ill recalibrate it tomorrow mourning.
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Old 11-09-2008, 03:37 AM   #18
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your KPA would have to be around 194 for 14 psi of boost, also fill out your Signature
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Old 11-09-2008, 10:39 AM   #19
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FWIW, Make sure your ground is on the back of the head with the ecu ground. That screwed me up at first. Then when I got that fixed.

My fuel was crazy rich, even after I straightened the WBO2 issue out. I reflashed my firmware and everything turned out fine.

I did have to lean my table out on Idle, and way richen the cruise. The map isn't perfect, but a very good start.
Good luck.
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Old 11-09-2008, 05:29 PM   #20
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Quote:
Originally Posted by Toddcod View Post
FWIW, Make sure your ground is on the back of the head with the ecu ground. That screwed me up at first. Then when I got that fixed.

My fuel was crazy rich, even after I straightened the WBO2 issue out. I reflashed my firmware and everything turned out fine.

I did have to lean my table out on Idle, and way richen the cruise. The map isn't perfect, but a very good start.
Good luck.
I used the ground that is near the throttle body, which every one says to use. Ive reloaded the firmware a few times. Currently im using the MS Extra.
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